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

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

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

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

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

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

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7. 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}
B
C
A

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

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

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

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

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

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

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

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

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

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

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

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

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

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21. 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
C
B
A
D

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

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

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

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Uncategorized

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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48. Cyclic phosphorylation produces:
ATP
NADPH
Glucose
Oxygen

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

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50. Photosynthesis takes place in:
Chloroplasts
Ribosomes
Nucleus
Mitochondria

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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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