NTS NAT Biology Repeated MCQs 2026 (Solved Past Papers)

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NTS Biology Important MCQs With Answers

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NTS NAT Biology Repeated MCQs 2026 (Solved Past Papers)

Section 1: Cell Biology & Biological Molecules

Focuses on organelles and basic biochemistry.

1. Which organelle is known as the “Powerhouse of the cell”? A) Ribosome B) Mitochondria C) Lysosome D) Golgi Apparatus
2. The basic structural and functional unit of life is: A) Cell B) Tissue C) Organ D) Molecule
3. Ribosomes are responsible for the synthesis of: A) Lipids B) Proteins C) Carbohydrates D) DNA
4. The cell wall of fungi is made up of: A) Cellulose B) Chitin C) Peptidoglycan D) Lignin
5. Which of the following is a non-reducing sugar? A) Glucose B) Fructose C) Sucrose D) Maltose
6. Enzymes increase the rate of reaction by: A) Increasing temperature B) Lowering activation energy C) Increasing activation energy D) Changing pH
7. The fluid mosaic model explains the structure of: A) Cell Wall B) Plasma Membrane C) Nucleus D) Cytoplasm
8. Which ion is essential for the activity of chlorophyll? A) Magnesium (Mg) B) Iron (Fe) C) Calcium (Ca) D) Potassium (K)
9. The process of Glycolysis occurs in which part of the cell? A) Mitochondria B) Cytoplasm C) Nucleus D) Ribosome
10. In DNA, Adenine always pairs with: A) Cytosine B) Guanine C) Thymine D) Uracil

Section 2: Biodiversity (Viruses, Bacteria, Fungi)

Common topics in NTS/FSc Part 1.

11. Viruses are considered as: A) Living organisms B) Non-living crystals C) Borderline between living and non-living D) Prokaryotes
12. The protein coat of a virus is called: A) Capsid B) Envelope C) Capsomere D) Tail
13. Bacteria that can survive without oxygen are called: A) Aerobic B) Anaerobic C) Facultative D) Microaerophilic
14. Which of the following is caused by a virus? A) Tuberculosis B) Hepatitis C) Cholera D) Tetanus
15. Penicillin is obtained from: A) Bacteria B) Fungi (Penicillium) C) Algae D) Virus
16. The scientific name of the onion is: A) Zea mays B) Allium cepa C) Solanum tuberosum D) Cassia fistula
17. Malaria is spread by the bite of: A) Male Anopheles B) Female Anopheles Mosquito C) Culex Mosquito D) Tsetse Fly
18. Which group of plants produces seeds but no fruits? A) Angiosperms B) Gymnosperms C) Pteridophytes D) Bryophytes
19. Bacteria reproduce asexually by: A) Budding B) Binary Fission C) Mitosis D) Meiosis
20. HIV attacks which cells in the human body? A) Red Blood Cells B) Helper T-Lymphocytes (White Blood Cells) C) Platelets D) Liver Cells

Section 3: Human Physiology (Systems)

High weightage section (Digestion, Circulation, Respiration).

21. The digestion of proteins begins in the: A) Mouth B) Stomach C) Small Intestine D) Esophagus
22. The functional unit of the kidney is: A) Neuron B) Nephron C) Alveoli D) Villus
23. Which blood group is known as the “Universal Donor”? A) A+ B) AB+ C) O- D) B-
24. The exchange of gases in lungs takes place in: A) Bronchi B) Trachea C) Alveoli D) Larynx
25. Insulin is secreted by which organ? A) Liver B) Pancreas C) Kidney D) Stomach
26. The longest bone in the human body is: A) Humerus B) Femur C) Tibia D) Radius
27. The gap between two neurons is called: A) Axon B) Dendrite C) Synapse D) Node
28. Which hormone controls the “Fight or Flight” response? A) Thyroxine B) Adrenaline (Epinephrine) C) Insulin D) Glucagon
29. The life span of Red Blood Cells (RBCs) is approximately: A) 60 days B) 120 days C) 180 days D) 10 days
30. Bile is produced by the: A) Liver B) Gallbladder C) Pancreas D) Stomach

Section 4: Genetics & Biotechnology

Essential for understanding inheritance and modern biology.

31. The physical appearance of an organism is called: A) Genotype B) Phenotype C) Allele D) Trait
32. Who is known as the Father of Genetics? A) Darwin B) Lamarck C) Gregor Mendel D) Watson
33. Humans have how many pairs of chromosomes? A) 46 B) 23 C) 22 D) 44
34. PCR stands for: A) Polymerase Chain Repair B) Polymerase Chain Reaction C) Protein Chain Reaction D) Polymerase Cell Reaction
35. A gene is a segment of: A) RNA B) DNA C) Protein D) Fat
36. Down syndrome is caused by: A) Monosomy 21 B) Trisomy 21 C) Trisomy 18 D) Point mutation
37. Which of the following is a vestigial organ in humans? A) Liver B) Appendix C) Pancreas D) Kidney
38. The process of making RNA from DNA is called: A) Translation B) Transcription C) Replication D) Mutation
39. Genetically modified bacteria are used to produce: A) Thyroxine B) Insulin C) Adrenaline D) Hemoglobin
40. The theory of Natural Selection was proposed by: A) Charles Darwin B) Lamarck C) Mendel D) Pasteur

Section 5: Ecology & General Biology

41. The primary source of energy in an ecosystem is: A) Plants B) Sun C) Water D) Air
42. Organisms that feed on dead organic matter are called: A) Herbivores B) Decomposers C) Carnivores D) Producers
43. The “Ozone Layer” protects us from: A) Infrared rays B) Ultraviolet (UV) rays C) X-rays D) Gamma rays
44. Symbiosis where both partners benefit is called: A) Parasitism B) Commensalism C) Mutualism D) Predation
45. Which gas is responsible for Global Warming? A) Oxygen B) Carbon Dioxide (CO2) C) Nitrogen D) Argon
46. The study of tissues is called: A) Cytology B) Histology C) Anatomy D) Physiology
47. Acid rain is caused by oxides of: A) Carbon B) Sulfur and Nitrogen C) Hydrogen D) Magnesium
48. In the food chain, plants are known as: A) Producers B) Consumers C) Decomposers D) Scavengers
49. A group of organisms of the same species living in the same area is a: A) Community B) Population C) Biosphere D) Ecosystem
50. The largest gland in the human body is: A) Liver B) Pituitary C) Thyroid D) Pancreas

1. The scientific study of living is called?
A. Anatomy
B. Biology
C. Geology
D. Zoology
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
2. The word “BIOLOGY” has been derived from_________ word?
A. Latin
B. English
C. Greek
D. French
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
3. According to the modern system of taxonomy, living organisms have been classified into?
A. Three Kingdoms
B. Five Kingdoms
C. Two Kingdoms
D. Six Kingdoms
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
4. Kingdom Protoctista includes____________?
A. Fungi
B. Prokaryotes
C. protists
D. Piantae
[toggle title=”View Answer” state=”close”]Answer: OptionC [/toggle]
5. Kingdom Fungi includes_______________?
A. A cellular, eukaryotic organisms
B. Non-chlorophylls, multicellular eukaryotic organisms
C. Non-chlorophylls, multicellular,thallophytic organisms
D. Chlorophyllus, multicellular, eukaryotic Organisms
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
6. Earthworm is included in_____________?
A. Kingdom Plantae
B. Kingdom Protoctista
C. Kingdom Monera
D. Kingdom Animalia
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
7. The Study of organisms inhabiting the sea and Ocean and the physical and chemical characteristics of their environment is:
A. Social Biology
B. Marine Biology
C. Environmental Biology
D. Fresh Water Biology
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
8. The branch of Biology which deals with the use of data and techniques of engineering & technology concerning living organisms is:
A. Human Biology
B. Environmental Biology
C. Genetics
D. Biotechnology
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
9. The branch in which organism’s life cycle, mode of transmission, and interaction with their hosts are studied is:
A. Anatomy
B. Physiology
C. Parasitology
D. Social Biology
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
10. The molecules of living matter that provide building blocks are mostly based on:
A. Carbon
B. Nitrogen
C. Hydrogen
D. Ammonia
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
11. Severe deficiency of Vitamin D results in __________.
A. scurvy
B. rickets
C. night blindness
D. osteomalacia
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
12. People living in high altitudes (like mountains) usually have a _________.
A. smaller number of Red Blood Cells
B. the lthe arger number of Red Blood Cells
C. smaller number of White Blood Cells
D. larger number of White Blood Cells
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
13. The average adult has a blood volume of about __________ liters.
A. 5
B. 5.5
C. 6
D. 6.5
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
14. The average internal temperature of the human body is __________.
A. 35 oC
B. 36 oC
C. 37 oC
D. 38 oC
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
15. Vitamin __________ is needed for the formation of a light-sensitive pigment in the retina.
A. A
B. C
C. D
D. B complex
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
16. About __________ of the body weight of a mammal is water.
A. 60%
B. 65%
C. 70%
D. 75%
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
17. On wound __________ fight foreign particles, like bacteria.
A. White Blood cells
B. Red Blood Cells
C. Platelets
D. Plasma
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
18. Blood is carried towards the heart by __________.
A. Arteries
B. Capillaries
C. Veins
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
19. __________ is essential for the formation of hemoglobin.
A. Calcium
B. Iron
C. Water
D. Carbohydrates
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
20. ___________ are needed as a source of energy for the vital activities of the body.
A. Calcium
B. Iron
C. Water
D. Carbohydrates
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
21. What is the main purpose of white blood corpuscles
A. To carry nutrients
B. To combat infection
C. To carry oxygen
D. To give strength
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
22. The total volume of blood in a human being is
A. 5-6 litres
B. 3-4 litres
C. 8-10 litres
D. 10-12 litres
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
23. Red blood corpuscles are formed in the
A. Liver
B. Bone Marrow
C. Kidneys
D. Heart
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
24. Blood does not coagulate inside the body due to the presence of
A. Haemoglobin
B. Heparin
C. Fibrin
D. Plasma
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
25. The number of bones in the human body of an adult is approximately
A. 210
B. 250
C. 206
D. 80
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
26. Lungs are situated in the
A. Abdominal cavity
B. Pericardial cavity
C. Buccal cavity
D. Thoracic cavity
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
27. The pancreas secretes
A. Insulin
B. Vitamin A
C. Bile juice
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
28. The seat of memory in the human brain is located in the
A. Medulla oblongata
B. Cerebrum
C. Cortex
D. Cerebellum
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
29. Tibia is bone found in the
A. Skull
B. Arm
C. Leg
D. Face
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
30. The strongest muscle in the human body is found in
A. Hands
B. Buttocks
C. Neck
D. Lungs
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]

31. The main function of the kidney is
A. To control blood pressure
B. To control body temperature
C. To remove waste products from the body
D. To help in the digestion of food
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
32. A gene is a
A. Sleep-inducing drug
B. Unit of heredity
C. A kind of vitamin
D. A type of body cell
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
33. The function of hemoglobin is
A. To transport oxygen
B. Destruction of bacteria
C. Prevention of anaemia
D. Utilization of energy
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
34. A vegetable containing sulfur is?
A. Potato
B. Cabbage
C. Brinjal
D. Pumpkin
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
35. Enzymes help in
A. Respiration
B. Digestion of food
C. Immune system
D. Reproduction
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
36. Ptyalin is an enzyme produced in the
A. Salivary glands
B. Pituitary glands
C. Thyroid glands
D. Pancreas
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
37. Heightened emotion is caused by
A. Pituitary glands
B. Thyroid glands
C. Adrenal glands
D. Salivary glands
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
38. The shortest bone in the human body is
A. Vertebrae
B. Phalanges
C. Stapes
D. Metacarpals
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
39. Lack of ____ causes diabetes
A. Sugar
B. Insulin
C. Calcium
D. Vitamins
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
40. Biopsy is done on
A. Tissues taken from a dead body
B. Tissues taken from a living body
C. Blood from Veins
D. Blood from Arteries
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
41. . Haemodialysis means cleaning of
A. urine
B. blood
C. glomerular filterate
D. coelomic fluid
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
42. Production of sweat and sebum is related with
A. skin
B. liver
C. lungs
D. GIT
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
43. The evaporative cooling in the respiratory tract of dogs is called
A. vasodilation
B. vasoconstriction
C. panting
D. All of these
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
44. Which of the following pathogen type cause disease that can be treated with antibiotics
A. bacteria
B. fungi
C. virus
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
45. Most cell membranes are composed principally of
A. DNA and protein
B. protein and lipids
C. protein and chitin
D. protein and RNA
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
46. Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the
A. concentration of water molecules inside and outside the cell
B. concentration of enzymes on either side of the cell membrane
C. rate of molecular motion on either side of the cell membrane
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
47. Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of
A. diffusion
B. passive transport
C. osmosis
D. active transport
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
48. Proteins are made from amino acids by the process of
A. hydrolysis
B. pinocytosis
C. dehydration synthesis
D. active transport
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
49. Which is an organic compound found in most cells
A. water
B. glucose
C. oxygen
D. sodium chloride
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
50. Which are the four most abundant elements in living cells
A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]

51. Human blood is an example of__________?
A. Organelle
B. Tissues
C. Organic compound
D. Inorganic compounds
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]

52. With different chemical arrangements and the formation Of complex molecules, life emerges on the level of the?
A. Cells
B. Tissues
C. Organs
D. Organ System
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
53. Organelles are_______________?
A. Unicellular structures
B. Multi-cellular structures
C. Sub-cellular structures
D. Non-cellular structures
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
54. Functional unit of DNA Is____________?
A. Nucleus
B. Genes
C. Chromosomes
D. Nucleolus
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
55. Various tissue types combine to make up__________?
A. Cells
B. Organs
C. Organ System
D. Organelles
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
56. Two or more populations of different species living and interacting in the same area form
A. Biosphere
B. Community
C. Population System
D. Ecosystem
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
57. A group of similar cells that perform a specific function is:
A. Organ
B. Tissues
C. Organelle
D. Organ System
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
58. Which of the following is an example of a “molecule”?
A. Chloroplast
B. A Nerve Cell
C. DNA
D. Hydrogen
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
59. A group of very similar interbreeding organisms constitutes?
A. Biosphere
B. Ecosystem
C. Population
D. Species
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
60. Members of one species inhabiting the same form_________?
A. Species
B. Community
C. Ecosystem
D. Population
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
61. Robert Hooke discovered_____________?
A. Nucleus
B. Mitochondria
C. Cell
D. DNA
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
62. Steps Involved in the scientific method are?
A. Hypothesis –>Accumulated data –> observation & experimentation –> conclusion
B. New data —> Conclusion —> Accumulated data —> Observation & experimentation
C. Accumulated data – New data – Observation & experimentation – Hypothesis –> Conclusion
D. Accumulated data —> Hypothesis –> Observation & experimentation —> New data —> Conclusion
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
63. Malaria is associated with___________?
A. Culex Mosquito
B. Culiesta Mosquito
C. Anopheles Mosquito
D. Culex & Anopheles Mosquito
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
64. Biologist ‘Grass’ discovered the life cycle of plasmodium in_______?
A. 1896
B. 1897
C. 1898
D. 1899
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
65. The first antibiotic to be discovered was_____________?
A. Penicillin
B. Cephalosporin
C. Aminoglycosides
D. Erythromycin
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
66. Immunization by vaccination was first introduced by?
A. Fleming in 1945
B. Florey & Chain in 1975
C. Flore & Chain in 1795
D. Edward Jenner in 1795
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
67. The science of growing terrestrial plants in an aerated solution is_________?
A. Hydrodynamics
B. Hydroponics
C. Hydroponics
D. None of them
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
68. An educated guess is called:
A. Accumulated Data
B. Observation
C. Hypothesis
D. Conclusion
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
69. Dolly, the sheep was a highly successful clone from a somatic cell, reported back in________?
A. 1993
B. 1994
C. 1995
D. 1996
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
70. Crop rotation helps in______________?
A. Growth of pathogens
B. Soil Infertility
C. Slowing of growth
D. Eradication of disease
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
71. People living in high altitudes (like mountains) usually have a _________?
A. smaller number of Red Blood Cells
B. The larger number of Red Blood Cells
C. smaller number of White Blood Cells
D. larger number of White Blood Cells
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
72. Which character differentiates living things from non-living organisms?
A. They live in the same ecosystem.
B. They are highly organized and complex made of one or more cells and contain genetic material
C. They are acted upon by the same environment
D. Both a and b
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
73. Which Vitamin is needed for the formation of a light-sensitive pigment in the retina?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. B complex
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
74. The average internal temperature of the human body is __________?
A. 35 oC
B. 36 oC
C. 37 oC
D. 38 oC
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
75. The study of fossils is called?
A. Environmental Biology
B. Historical biology
C. Palaeontology
D. Social biology
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
76. About __________ of the body weight of a mammal is water
A. 60%
B. 65%
C. 70%
D. 75%
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
77. The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by?
A. Molecular biologists
B. Microbiologists
C. Freshwater biologists
D. Social biologist
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
78. On wound __________ fight foreign particles, like bacteria?
A. White Blood cells
B. Red Blood Cells
C. Platelets
D. Plasma
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
79. Synthetic insulin from pork was formed by which technique?
A. Biotechnology
B. Social biological techniques
C. Parasitology
D. Both a and c
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
80. Blood is carried towards the heart by __________?
A. Arteries
B. Capillaries
C. Veins
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
81. The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called?
A. Environmental biology
B. Social biology
C. Human biology
D. Both b and c
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
82. __________ is essential for the formation of hemoglobin.
A. Calcium
B. Iron
C. Water
D. Carbohydrates
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
83. Out of 92 naturally occurring chemical elements how many are considered as bio-elements?
A. 6
B. 16
C. 26
D. 15
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
84. ___________ are needed as a source of energy for the vital activities of the body?
A. Calcium
B. Iron
C. Water
D. Carbohydrates
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
85. Oxygen accounts for ____ % of totals human body mass?
A. 65%
B. 18%
C. 10%
D. 3%
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
86. The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called:
A. An organ
B. A molecule
C. Tissue
D. Both a and c
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
87. Which one of them is a micro-molecule?
A. Polysaccharide
B. Protein
C. Hemoglobin
D. ATP
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
88. A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:
A. An organ
B. An organism
C. A Tissue
D. A Cell
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
89. Haemodialysis means cleaning of____________?
A. Urine
B. Blood
C. Glomerular filterate
D. Coelomic fluid
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
90. In animals coordination is achieved by means of?
A. Nervous system
B. Endocrine system
C. Respiratory system
D. Both A and B
[toggle title=”View Answer” state=”close”]Answer: Option D [/toggle]
91. Production of sweat and sebum is related to?
A. Skin
B. Liver
C. Lungs
D. GIT
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
92. A group of living organisms of the same species living in the same place at the same time is called?
A. Community
B. Population
C. Ecosystem
D. Biome
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
93. The evaporative cooling in the respiratory tract of dogs is called?
A. Vasodilation
B. Vasoconstriction
C. Panting
D. All of these
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
94. Different species of plants and animals living in the same habitat are called?
A. Population
B. Community
C. Biome
D. Habitat
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
95. Which of the following pathogen type cause disease that can be treated with antibiotics?
A. bacteria
B. fungi
C. virus
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
96. A large regional community primarily determined by climate is called?
A. Population
B. Community
C. Biome
D. Habitat
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
97. Most cell membranes are composed principally of?
A. DNA and protein
B. Protein and Lipids
C. Protein and Chitin
D. Protein and RNA
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
98. The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time sequence came from the studies by?
A. Environmental biologist
B. Paleontologist
C. Marine biologist
D. Social biologist
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
99. Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the?
A. Concentration of water molecules inside and outside the cell
B. Concentration of enzymes on either side of the cell membrane
C. Rate of molecular motion on either side of the cell membrane
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
100. It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statements is correct in this respect?
A. Older sediment layers have an equal amount of these radioactive isotopes as that thing ones
B. Older sediment layers have less amount of radioactive isotopes than ofthanhe young ones.
C. Older sediment layers have a greater amount of these radioactive isotopes than that of young ones.
D. Older sediment layers did not have these radioactive isotopes
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
101. Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of
A. Diffusion
B. Passive transport
C. Osmosis
D. Active transport
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
102. An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called?
A. Biome
B. Phyletic lineage
C. Community
D. Population
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
103. Proteins are made from amino acids by the process of ______________?
A. Hydrolysis
B. Pinocytosis
C. Dehydration synthesis
D. Active transport
[toggle title=”View Answer” state=”close”]nswer: Option C[/toggle]
104. Biological sciences have a set methodology and it is based on?
A. Experimental inquiry
B. Esthetic preference
C. Philosophical ideas
D. Imaginations
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
105. Which is an organic compound found in most cells?
A. Water
B. Glucose
C. Oxygen
D. Sodium chhypothesesggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
106. A series of hypotheses supported by the results of many tests is called?
A. Scientific law
B. Theory
C. Data
D. Deduction
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
107. Which are the four most abundant elements in living cells?
A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
108. Which one is not correct for a productive theory?
A. It is predictive
B. It has explanatory power
C. It discourages the suggestion of different hypotheses
D. None of tMendel’soggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
109. Conclusion of Mendel’s work later became a_____________?
A. Scientific hypothesis
B. Theory
C. Scientific law
D. Productive theory
[toggle title=”View Answer” state=”close”later: Option C[/toggle]
110. Starch is converted into maltose by?
A. diastase
B. invertase
C. maltase
D. amylase
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
111. Breeders have developed new and better varieties of food items by using which technique?
A. Pasteurization
B. Hydroponic culture technique
C. Genetic engineering
D. Biological control techniques
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
112. Co-enzyme is often formed from?
A. lipid
B. protein
C. inorganic ion
D. vitamin
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
113. The producion of genetically identical copies of organisms/cells by artificial reproduction is called?
A. Mitosis
B. Replication
C. Cloning
D. Biological control
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
114. Messenger RNA is formed in_________?
A.nucleus
B.chloroplast
C.mitochondria
D.none of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
115. Astronauts may use which technique to grow fruits and vegetables?
A. Tissue culture techniques
B. Cloning
C. Pasterisation
D. Hydroponic culture technique
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
116. Number of chromosomes in E. coli?
A. 1
B. 2
C. 4
D. 6
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
117. Which statement is incorrect for pasteurization?
A. It is used to preserve yogurt and milk
B. It was developed by Louis Pasteur.
C. It involves heating the substance at a high temperature for just a few sec.
D. It can be used to preserve vegetables and meat.
[toggle title=”View Answer” state=”cloGolginswer: Option D[/toggle]
118. Protein factory is___________?
A. nucleus
B. ribosome
C. golgi complex
D. centriole
[toggle title=”Vithe new Answer” state=”close”]Answer: Option B[/toggle]
119. What is the mode of transmission of the Hepatitis virus?
A. Aerosol
B. Parenteral (via blood)
C. Skin penetration
D. Unknown
[toggle title=”View Answer state=”close”]Answer: Option B[/toggle]
120. Smallest disease-causing agents in plants are?
A. virion
B. mycoplasma
C. viroids
D. prions
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
121. Which disease can be controlled by vaccination?
A. Measles
B. Cancer
C. Diabetes
D. Heart att-ack
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
122. The major cell infected by HIV is a lymphocyte .

A. helper-T
B. B
C. Both T and B
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
123. Vaccine was first developed by____________Both
A. Louis PaNonee
B. Edward Jenner
C. Jaber Ibn Hayan
D. Aristotle
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
124. Pigment present in red algae is_____________?
A. fucoxanthin
B. phycocyanin
C. phycoerythrin
D. bilirubin
[toge=”View Answer” state=”close”]Answer: Option C[/toggle]
125. Which disease has been totally eradicated from the world because of effective vaccination?
A. Measles
B. Polio
C. Smallpox
D. Hepatitis
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
126. Nutrition in fungi is___________?
A. PhotosynthetSmallpoxmosynthetic
C. Completely parasitic
D. Absorptive heterotrophs
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
127. Which of the following statements is incorrect about antibiotics?
A. They are used against microorganisms
B. They are always effective against bacteria
C. They are used in diseases like tuberculosis and pneumonia
D. They are derived from bacteria only
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
128. Fungi resemble plants because they lack___________?
A. Cell wall
B. Cytoplasm
C. Centriole
D. Nucleus
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
129. Which treatment is instituted in a cancerous patient?
A. Antibiotic therapy
B. Radiotherapy
C. Gene therapy
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
130. Which is a parasitic plant?
A. cuscuta
B. rose
C. ferns
D. mosses
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
131. Which statement is incorrect for cloning?
A. The nucleus of a fertilized egg is replaced by the nucleus from the cell of a fully developed individual
B. Division of a single egg into one or more separate embryos.
C. The individual is the mirror image of the parent organism
D. It involve methods of reproduction
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
132. True roots absent in_____________?
A. ferns
B. bryophytes
C. gymnosperms
D. angiosperms
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
133. Removal or degradation of environmental pollutants or toxic materials by living organisms is called__________?
A. Integrated disease management
B. Hydroponic culture technique
C. Pasteurization
D. Bioremediation
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
134. The mechanism for ATP synthesis is_____________?
A. Chemosynthesis
B. Photosynthesis
C. Phosphorylation
D. Chemiosmosis
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
135. Which of the following is not a viral disease?
A. Cowpox
B. Mumps
C. Tetanus
D. Smallpox
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
136. Enzyme present in the saliva is_____________?
A. lipase
B. trySmallpoxtyalthe in
D. in,trade
[tthe toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
137. In the human body, 99% of the total mass is formed of_____________?
A. 16 Bio-elements
B. 12 Bio-elements
C. 10 Bio-elements
D. 6 Bio-elements
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
138. Nitrogen is present in___________?
A. carbohydrates
B. proteins
C. lipids
D. carbonates
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
139. Biological organization is_____________?
A. simple
B. advance
C. complex
D. highly complex
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
140. Operculum is present in_____________?
A. bony fish
B. sea fish
C. cartilaginous fish
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]
141. The arrangement of ________ speaks of the division of laboNoneithin a cell.
A. Molecule
B. Subatomic particles
C. Atoms
D. Organelles
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
142. In which animal respiratory surface is found in more than one organ?
A. birds
B. human
C. fish
D. frog
[toggle title=”View Answer” state=”close”]Answer: Option D[/toggle]
143. Communities are ________ collection of organisms?
A. Static
B. Dynamic
C. May be static or dynamic
D. None of these
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
144. The heart is enclosed in a membrane called________?
A. pleura
B. pericardium
C. peritoneum
D. epithelium
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
145. The number of species of organisms currently known to science is?
A. 3500000
B. 35000
C. 2500000
D. 25000000
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
146. From the right ventricle, blood is pushed into?
A. pulmonary trunk
B. brain
C. aorta
D. body
[toggle title=”View the Answer” state=”close”]Answer: Option A[/toggle]
147. What is the branch of biology in which the structure and function of tissues are studied___________?
A. Cell Biology
B. Taxonomy
C. Histology
D. Morphology
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
148. Biometry is the application of_______ in biology.
A. Algebra
B. Statistics
C. Matrix
D. Geometry
[toggle title=”View Answer” state=”close”]Answer: Option B[/toggle]
149. The study of insects is called_________?
A. Immunology
B. Parasitology
C. Entomology
D. Paleontology
[toggle title=”View Answer” state=”close”]Answer: Option C[/toggle]
150. The term biology was introduced in__________ in 1800.
A. Germany
B. Turkey
C. Italy
D. Japan
[toggle title=”View Answer” state=”close”]Answer: Option A[/toggle]