Biology Biodiversity Test Online MCQs

Mustansar KhanLast Updated: October 14, 2025

Important Biodiversity Question and Answer

Total Questions:	49
Time Allowed:	25 Minutes
Total Marks:	49
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Biology Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Biology Interview Question Answer Universities Entrance Test

Biodiversity Practice Test Online With Explanation

Please wait...

Page 1 of 2

Uncategorized

1. Which type of virus causes the common cold?

Influenza virus

HIV

Rhinovirus

Rabies virus

2. Which viral disease causes damage to the immune system?

AIDS

Dengue

Measles

Polio

3. Viruses are classified on the basis of:

Color

Number of ribosomes

Type of nucleic acid

Shape and size only

4. Viruses multiply by:

Host-directed replication

Budding

Binary fission

Fragmentation

5. Which of the following best describes HIV?

DNA virus

Plant virus

Non-infectious virus

RNA virus with reverse transcriptase

6. Which of the following best describes a virus?

Prokaryotic organism

Living cell

Acellular infectious agent

Non-living chemical

7. The protein coat of a virus is called:

Envelope

Core

Membrane

Capsid

8. Viruses are considered living when they:

Are in water

Are in crystalline form

Are inside host cells

Are in air

9. Viruses that infect plants are usually:

Retroviruses

Bacteriophages

RNA viruses

DNA viruses

10. The protein coat of a virus is composed of subunits called:

Peptones

Capsomeres

Enzymes

Ribosomes

11. Why are viruses considered obligate parasites?

They are photosynthetic

They are cellular

They require a host to reproduce

They live independently

12. Who discovered the first virus?

Martinus Beijerinck

Robert Hooke

Edward Jenner

Louis Pasteur

13. Which of the following viral diseases can be prevented by a vaccine?

HIV

Measles

Hepatitis B

Common cold

14. Which of the following diseases is NOT caused by a virus?

Tuberculosis

Measles

Influenza

Hepatitis

15. Which virus was the first to be crystallized?

Polio virus

AIDS virus

Tobacco mosaic virus

Influenza virus

16. How is viral RNA replicated in host cells?

By host cell enzymes

By virus itself

It does not replicate

By sunlight

17. The core of a virus contains:

Cytoplasm

Mitochondria

DNA or RNA

Ribosomes

18. Which enzyme is used by retroviruses to make DNA from RNA?

Ligase

RNA polymerase

DNA polymerase

Reverse transcriptase

19. The AIDS virus primarily targets:

Platelets

Red blood cells

B-cells

Helper T-cells

20. Which virus infects bacteria?

Bacteriophage

Retrovirus

Orthomyxovirus

Baculovirus

21. What shape is the tobacco mosaic virus?

Icosahedral

Helical

Complex

Spherical

22. The function of reverse transcriptase is to:

Convert RNA into DNA

Replicate DNA

Convert protein into DNA

Convert DNA into RNA

23. Which virus has both DNA and a lipid envelope?

Herpes simplex virus

HIV

Influenza virus

Polio virus

24. What is the main mode of transmission for HIV?

Sexual contact and blood

Contaminated food

Air

Insect bites

25. Which scientist first observed the mosaic disease in tobacco plants?

Jenner

Dmitri Ivanovsky

Hershey

Louis Pasteur

Page 2 of 2

26. A virus cannot reproduce unless it:

Is inside a host cell

Has nutrients

Is in water

Absorbs sunlight

27. Which part of the virus determines its host specificity?

RNA

Enzyme content

DNA

Capsid proteins or envelope glycoproteins

28. Which of the following structures is absent in viruses?

Nucleic acid

Enzymes

Protein coat

Cell wall

29. Which of these diseases is not caused by a virus?

Chickenpox

Mumps

Tetanus

Measles

30. Which of the following viral diseases is prevented using a vaccine?

Common cold

AIDS

Rabies

Hepatitis B

31. Viral DNA integrated into the host DNA is called:

Episome

Capsid

Provirus

Plasmid

32. Viruses can be seen with:

Compound microscope

Electron microscope

Light microscope

Dissecting microscope

33. How are viruses different from bacteria?

Bacteria are acellular

Viruses have nuclei

Viruses need a host to replicate

Bacteria can’t reproduce

34. The shape of a bacteriophage resembles:

Lunar lander or tadpole

Sphere

Rod

Coil

35. Who was awarded the Nobel Prize for work on the HIV virus?

Louis Pasteur

Jonas Salk

Edward Jenner

Luc Montagnier

36. The outer envelope of some viruses is made of:

Lipid membrane

Cellulose

Peptidoglycan

Protein

37. Which viral disease is sexually transmitted?

Influenza

AIDS

Rabies

Dengue

38. Which virus leads to the disease AIDS?

HBV

HSV

HIV

HPV

39. Viruses are inactive:

At high temperatures

In the presence of light

Outside a host cell

In acidic medium

40. What is the incubation period of HIV before symptoms of AIDS appear?

2–4 months

Immediate symptoms

Several years

1–2 weeks

41. Which component helps the virus to attach to host cells?

Envelope proteins

Capsid

Enzymes

RNA

42. Which virus affects the liver?

Herpes

Hepatitis virus

Polio virus

HIV

43. What type of nucleic acid is found in HIV?

Double-stranded DNA

Double-stranded RNA

Single-stranded DNA

Single-stranded RNA

44. What does the term “virion” refer to?

Complete, infectious virus particle

Viral protein only

Viral genome

Viral toxin

45. Which enzyme do viruses lack?

RNA polymerase

Ribosomes

Helicase

Reverse transcriptase

46. Which type of virus causes cervical cancer?

HTLV

HIV

HPV

HSV

47. The genetic material of a virus can be:

Only RNA

Both DNA and RNA in the same virus

Only DNA

Either DNA or RNA, but not both

48. Which of the following is considered an acellular organism?

Bacteria

Algae

Virus

Fungi

49. Which structure is shared by all viruses?

Mitochondria

Protein coat

Ribosomes

Cell wall

More Related Resources

Punjab 9th Class Biology Chapter 3 ... FBISE 9th Class Biology Chapter 3 B... KPK 9th Class Biology Chapter 3 Bio... 9th Class Biology: chapter 3 Biodiv... NTS NAT Biology Repeated MCQs 2026 ... 11th Class Biology Chapter 1 Biolog... 11th Class Biology Chapter 5 Variet... 11th Class Biology Chapter 8 Fungi ... 11th Class Biology Chapter 1 Introd... 11th Class Biology Chapter 7 Short ...

Can't find what you're looking for? Search below:

Latest Updates

NTS NAT Biology Repeated MCQs 2026 (Solved Past Papers)
PPSC Syllabus for Biology Lecturer 2026 Sample Test Pattern
Punjab 9th Class Biodiversity Chapter 3 Test Online
9th Class Smart Syllabus 2026-26 PECTAA Punjab – Subject-Wise R...
Brunei Darussalam BS and MS Scholarship 2026 Apply Online Eligibi...

Mustansar KhanLast Updated: October 14, 2025

Important Biodiversity Question and Answer

Biodiversity Practice Test Online With Explanation

Uncategorized

More Related Resources

Latest Updates

Mustansar Khan

Leave a Reply Cancel reply