Biology Bio-Energetic Test Online Mcqs

Maan AliLast Updated: October 14, 2025

Important Biology Bio-energetic 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

Biology Bio-energetic Practice Test Online With Explanation

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Medical Subject

1. The interior of thylakoid apace is also called a ?
Enteron
Coelom
Cavity
Lumen

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2. Which wavelengths are mainly absorbed by chlorophyll ?
Red and indigo
Green and blue
Violet and orange
Violet blue and orange red

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3. The presence of free oxygen made possible the evolution of ?
Respiration
Photosynthesis
Man
Dark reactions

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4. Thylakoid membranes are involved in ATP formation by ?
Chemiosmosis
Oxidative phosphorylation
Chemosynthesis
Osmosis

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5. The pigments found in the thylakoid membranes are ?
All of these
Chlorophyll
Xanthophyll
Carotenoids

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6. Which equation of photosynthesis is correct one ?

A=6CO 2 + 12H 2 O + Light→C₆ H₁₂ O₆ + 6O₂ + 6H₂ O
B=6CO₂ + 6H₂ O + Light→C₆ H₁₂ O₆ + 6O_{2

C=Both of these}
A
C
B

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7. The number of chlorroplasts in each mesophyll cell ranges from ?
60-80
20-100
20-40
20-60

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8. Process of photosynthesis is almost exactly opposite to ?
Aerobic respiration
Anaerobic repiration
Combustion
Fermentation

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9. Oxygen released during photosynthesis comes from ?
Carbian dia axcide
soil
Haydrogen
Atmosphere

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10. Which wavelengths are least absorbed by chlorophyll ?
Violet and yellow
Orange and indigo
Blue and red
Green and yellow

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11. Magnesium is an important nutrient ion in green plants as it is an essential component of ?
Chlorophyll
Cell sap
Glucose
Protein

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12. The number of chloroplastis in a square millimeter of leaf surface is about ?
0.5 million
Half a million
5 lac
All of above

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13. Thylakoid sacs are stacked in columns called ?
Stroma
Piles
Grana
Lamellae

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14. The products of photosynthetic light reaction are ?
ATP and NADH
ATP and FADPH
ATP and NADPH
ATP and NAD

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15. Which statement about chlorophyll is not true ?
It contains terminal carbonyl group
It contains porphyring ring
It contains phytol tail
It contains magnesium

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16. Which statement about photosynthesis is not correct ?

A=CO₂ and H₂ O are used
B=Take place in light and dark
C=Light energy absorbed by chlorophy
D=Occurs in almost all the green parts of Plant
D
A
B
C

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17. What is not correct of photosynthesis ?
None of these
It uses water
It uses oxygen
It occurs during day time

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18. Loght can work in photosynthesis only if it is ?
Absorbed
Reflected
Transmitted
Refracted

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19. Chlorophyll contains magnesium in which part ?
Hacme portion
Phytol tail
Porphyrin
Pyrrole ring

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20. The principles of energy transformations in living systems is called ?
THermodynamics
Bioenergetics
Biophysics
Biochemistry

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21. Spectrophotometer is used to measure ?
Absorption of water
Absorption of blue light
Absorption of different wavelengths
Absorption of carbon

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22. The color of chlorophyll b is ?
Orange red
Yellow and green
Blue and green
Orange green

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23. Which part of plant captures light energy ?
Stomata
Mesophyll cell
Plastids
Choroplast

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24. What is unrelated to light reactions ?
NADPH is produced in it
It can occur in dark
ATP is produced in it
It can occur in light only

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Uncategorized

25. Photosynthesis takes place in:
Nucleus
Chloroplasts
Mitochondria
Ribosomes

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26. Which gas is released during photosynthesis?
Carbon dioxide
Oxygen
Nitrogen
Methane

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27. The term "oxidative phosphorylation" refers to:
ATP production using energy from electrons and oxygen
Glucose oxidation
ATP formation during glycolysis
Electron transfer without ATP

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28. Which process produces the most ATP in cellular respiration?
Fermentation
Krebs cycle
Glycolysis
Electron transport chain

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29. The light-dependent reactions of photosynthesis occur in:
Thylakoid membrane
Cytoplasm
Inner membrane
Stroma

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30. Non-cyclic phosphorylation produces:
ATP and NADPH
Only ATP
Oxygen only
Glucose

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31. Which pigment is primarily responsible for absorbing sunlight?
Chlorophyll-a
Chlorophyll-b
Carotene
Xanthophyll

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32. What is photolysis?
Breakdown of glucose
Absorption of sunlight
Splitting of water using light
Fixation of carbon dioxide

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33. Which of the following is produced during anaerobic respiration in muscles?
Ethanol
Carbon dioxide
Lactic acid
Pyruvate

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34. Chloroplast encloses a dense fluid filled region called ?
Grana
Stroma
Matrix
Cytosol

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35. In glycolysis, one glucose molecule is broken down into:
Two lactate molecules
One acetyl-CoA
Two pyruvate molecules
Two carbon dioxide molecules

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36. Which stage of photosynthesis does not require light?
Photophosphorylation
Photolysis
Light-dependent reaction
Calvin cycle

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37. What is the main site of the electron transport chain?
Cytoplasm
Mitochondrial matrix
Golgi apparatus
Inner mitochondrial membrane

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38. In the Calvin cycle, which molecule is fixed to form sugars?
Water
Oxygen
Carbon dioxide
Glucose

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39. Cyclic phosphorylation produces:
NADPH
Oxygen
Glucose
ATP

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40. Which process occurs in the absence of oxygen?
Anaerobic respiration
Glycolysis
Aerobic respiration
Electron transport chain

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41. How many ATP molecules are used in the Calvin cycle to form one glucose?
36
12
18
6

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42. The net gain of ATP molecules in glycolysis is:
1
4
8
2

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43. Which molecule is the final electron acceptor in aerobic respiration?
Carbon dioxide
NAD⁺
Water
Oxygen

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44. What is the role of water in photosynthesis?
Reduces glucose
Releases carbon dioxide
Absorbs light
Provides electrons and protons

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45. Where does the Calvin cycle take place?
Cytoplasm
Mitochondrial matrix
Thylakoid membrane
Stroma of chloroplast

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46. How many ATP molecules are produced from one glucose molecule in aerobic respiration?
10
18
24
32–38

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47. The first stable compound in the Calvin cycle is:
RuBP
ATP
PGAL
PGA (3-phosphoglyceric acid)

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48. What is the primary product of the light-dependent reaction?
Glucose
Oxygen
ATP and NADPH
Pyruvate

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49. Which of the following occurs in the cytoplasm?
Glycolysis
Krebs cycle
Electron transport chain
Oxidative phosphorylation

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50. Which factor does not directly affect the rate of photosynthesis?
Temperature
Light intensity
CO₂ concentration
Oxygen concentration

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Maan AliLast Updated: October 14, 2025

15 Comments

Saba kanwal says:

September 12, 2022 at 8:17 pm

Very helpful

ZaheerAhmed says:

October 1, 2021 at 9:18 am

Best of luck

uziiiiiii says:

August 29, 2021 at 1:51 pm

dono kay leyay hotaa hay

Basit Shah says:

April 6, 2021 at 10:12 pm

I got 100% test was so simple

Noor says:

December 7, 2020 at 10:14 pm

Activation energy lazmi hoti he hr rxn k lie

Alpha says:

October 25, 2020 at 4:28 pm

67%

Salman says:

August 5, 2020 at 3:57 pm

There are 10 steps involved in glycolysis and iron is more essential than magnesium to avoid chlorosis

Ezat kakar says:

August 28, 2017 at 8:15 pm

Litle bit goog.

1. Laveeza muheeb says:
  
  September 12, 2022 at 7:18 pm
  
  Even best way to remember these mcqss…..
  
2. sunum says:
  
  October 28, 2022 at 12:11 pm
  
  energy isnot requirs in exergonic rxn
  
fozia says:

July 21, 2017 at 6:25 pm

endergonic k lye to energy chahye lkn exergonic k lye to ni

1. uziiiiiii says:
  
  August 29, 2021 at 1:43 pm
  
  dono ka leya hota hay
  
2. Muhammad Iqbal says:
  
  April 5, 2022 at 4:30 pm
  
  agreed me b isi pe confuse ta
  
3. Abid says:
  
  September 13, 2022 at 8:17 pm
  
  Initiation energy is required for all the reaction
  
4. Hasrat says:
  
  September 13, 2022 at 8:58 pm
  
  Activation energy ke bat horai hay

Important Biology Bio-energetic Question and Answer

Biology Bio-energetic Practice Test Online With Explanation

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