Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

Cyclic photophosphorylation has both photosystem I and II.

A. True
B. False
C. May be True or False
D. Can't say
Answer» C. May be True or False
Discussion
2.

Which of the following Vitamins act as an electron acceptor in light dependent photosynthesis?

A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer» E.
Discussion
3.

During photosynthesis, how many chlorophyll molecules are required to produce one oxygen molecule?

A. 1000
B. 2000
C. 2500
D. 3000
Answer» D. 3000
Discussion
4.

What is photophosphorylation?

A. Addition of phosphate without light
B. Removal of phosphate without light
C. Addition of phosphate with light
D. Removal of phosphate with light
Answer» D. Removal of phosphate with light
Discussion
5.

Who discovered photophosphorylation?

A. D David
B. D Benjamin
C. D Arnon
D. D Robert
Answer» D. D Robert
Discussion
6.

Which of the following is a facultative CAM plant?

A. Century plant
B. Corn
C. Maize
D. Common ice plant
Answer» E.
Discussion
7.

How many molecules of ATP and NADPH₂ are used in synthesis of one glucose molecule?

A. 30 ATP and 10 NADPH₂
B. 10 ATP and 30 NADPH₂
C. 30 ATP and 12 NADPH₂
D. 12 ATP and 30 NADPH₂
Answer» D. 12 ATP and 30 NADPH₂
Discussion
8.

Which of the following protein is disrupted due to the disorder in photophosphorylation reaction?

A. C1
B. D1
C. H1
D. K1
Answer» C. H1
Discussion
9.

The inactivation of photosynthesis is known as photo inhibition.

A. True
B. False
C. May be True or False
D. Can't say
Answer» B. False
Discussion
10.

Who discovered C3 cycle?

A. Melvin Calvin
B. Kolliker
C. Robert Brown
D. Rudolph Markus
Answer» B. Kolliker
Discussion
11.

Which of the following is an example of C3 plants?

A. Sugarcane
B. Cactus
C. Wheat
D. Corn
Answer» D. Corn
Discussion
12.

In the conversion of ADP to ATP by the enzyme ATP synthase, which reaction helps in the movement of H⁺ across the membranes?

A. Redox reaction
B. Oxidation reaction
C. Chemiosmosis
D. Redox reaction
Answer» D. Redox reaction
Discussion
13.

C3 plants grown in cold climates.

A. True
B. False
C. May be True or False
D. Can't say
Answer» B. False
Discussion
14.

Calvin cycle occurs in the cytoplasm of the cell.

A. True
B. False
C. May be True or False
D. Can't say
Answer» C. May be True or False
Discussion
15.

What is the final product of the Calvin cycle?

A. Sedoheptulose
B. Erythrose
C. Glucose
D. Ribose
Answer» D. Ribose
Discussion
16.

How many ATP molecules are required to produce one molecule of glucose?

A. 18
B. 15
C. 12
D. 9
Answer» B. 15
Discussion
17.

Which of the following enzyme is used to fix CO₂ through Calvin cycle?

A. Ribose -1, 5- bisphosphate carboxylase
B. Ribulose -1, 6- bisphosphate carboxylase
C. Ribose -1, 6- bisphosphate carboxylase
D. Ribulose -1, 5- bisphosphate carboxylase
Answer» E.
Discussion
18.

Identify the following compound.

A. Ru5P
B. RuBP
C. R5P
D. Rpi
Answer» C. R5P
Discussion
19.

Identify A and B from the below figure.

A. A – Lumen; B – Thylakoids
B. A – Thylakoids; B – Lumen
C. A – Stroma; B – Grana
D. A – Grana; B – Stroma
Answer» C. A – Stroma; B – Grana
Discussion
20.

Photon of light of higher wavelength has _____________ energy.

A. higher
B. lower
C. intermittent
D. dissipated
Answer» C. intermittent
Discussion
21.

Which types of molecules are synthesized in light-independent (dark) reactions?

A. proteins
B. glycolipids
C. carbohydrates
D. nucleic acids
Answer» D. nucleic acids
Discussion
22.

Energy absorbed from sunlight is stored as chemical energy in which of the following biomolecules?

A. ATP, ADP
B. ATP, NADPH
C. NAD, FAD
D. NADH2, ATP
Answer» C. NAD, FAD
Discussion