Explore topic-wise MCQs in Biology.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

In which process does carbon dioxide join photosynthesis?

A. Oxidation
B. PS I
C. Dark reaction
D. Reduction
Answer» D. Reduction
Discussion
2.

The process by which the pH gradient across the membrane provides energy for the synthesis of ATP is called as ______

A. Phosphorylation
B. Transfusion
C. Diffusion
D. Chemiosmosis
Answer» E.
Discussion
3.

The electrons produced in the photolysis of water enters ______

A. Fe-S protein
B. PS II
C. Plastocyanin
D. Cytochrome a
Answer» C. Plastocyanin
Discussion
4.

_______ accepts the electrons from Pheophytin.

A. Cytochrome f
B. Cytochrome d
C. Plastoquinone
D. Ferredoxin
Answer» D. Ferredoxin
Discussion
5.

In PS II, the last electron acceptor is ______

A. Plastocyanin
B. Ferredoxin
C. Cytochrome b6
D. Cytochrome b12
Answer» B. Ferredoxin
Discussion
6.

_____ is the only product in cyclic photophosphorylation.

A. ADP
B. ATP
C. Hydrogen
D. Oxygen
Answer» C. Hydrogen
Discussion
7.

The name of the scheme given to the transport of electrons is called as _______

A. Z scheme
B. W scheme
C. Y scheme
D. E scheme
Answer» B. W scheme
Discussion
8.

How much hydrogen protons are released by twelve water molecules?

A. 48
B. 6
C. 12
D. 24
Answer» E.
Discussion
9.

Water produces electrons for the reduction reactions of photosynthesis.

A. True
B. False
Answer» B. False
Discussion
10.

The first electron acceptor in photosystem 1 is _____

A. Plastoquinone
B. Cytochrome b
C. A Fe-S protein
D. Water
Answer» D. Water
Discussion
11.

The electron transport system occurs in _____

A. Thylakoid membrane
B. Stroma
C. Cytosol
D. Mitochondria
Answer» B. Stroma
Discussion