Explore topic-wise MCQs in Biochemistry.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

The percentage of light energy fixed in photosynthesis is around ____________

A. 100%
B. 10%
C. 1%
D. 0.1%
Answer» D. 0.1%
Discussion
2.

Who is the first person to study the influence of light during photosynthesis?

A. Blackmann
B. Van Niel
C. J. Ingenhouz
D. Warburg
Answer» D. Warburg
Discussion
3.

Photosynthesis can be described as ____________

A. Reductive, anabolic, endergonic process
B. Reductive, anabolic, exergonic process
C. Oxidative, anabolic, endergonic process
D. Oxidative, catabolic, exergonic process
Answer» B. Reductive, anabolic, exergonic process
Discussion
4.

Light energy is converted to chemical energy in the presence of ____________

A. Chloroplast
B. Ribosomes
C. Mitochondria
D. Stomata
Answer» B. Ribosomes
Discussion
5.

Calvin cycle occurs in ____________

A. Cytoplasm
B. Chloroplast
C. Mitochondria
D. Golgi body
Answer» B. Chloroplast
Discussion
6.

Hydrogen is transferred from the light reaction to the dark reaction in photosynthesis by _____________

A. DPN
B. NAD
C. ATP
D. NADP
Answer» B. NAD
Discussion
7.

What are the favorable conditions for cyclic photophosphorylation?

A. Aerobic and optimum light
B. Aerobic condition only
C. Aerobic and low light intensity
D. Anaerobic and low light intensity
Answer» B. Aerobic condition only
Discussion
8.

Which one of the following is the source of electrons in photosynthesis?

A. Carbohydrates
B. CO2
C. Water
D. NADH
Answer» D. NADH
Discussion
9.

THE_FIRST_PERSON_TO_STUDY_THE_INFLUENCE_OF_LIGHT_DURING_PHOTOSYNTHESIS_IS?$

A. Blackmann
B. Van Niel
C. J. Ingenhouz
D. Warburg
Answer» D. Warburg
Discussion
10.

The percentage of light energy fixed in photosynthesis is around 

A. 100%
B. 10%
C. 1%
D. 0.1%
Answer» D. 0.1%
Discussion
11.

Photosynthesis can be described a?

A. Reductive, anabolic, endergonic process
B. Reductive, anabolic, exergonic process
C. Oxidative, anabolic, endergonic process
D. Oxidative, catabolic, exergonic process
Answer» B. Reductive, anabolic, exergonic process
Discussion
12.

Light energy is converted to chemical energy in the presence of

A. Chloroplast
B. Ribosomes
C. Mitochondria
D. Stomata
Answer» B. Ribosomes
Discussion
13.

Calvin cycle occurs in

A. Cytoplasm
B. Chloroplast
C. Mitochondria
D. Golgi body
Answer» B. Chloroplast
Discussion
14.

Hydrogen is transferred from the light reaction to the dark reaction in photosynthesis by

A. DPN
B. NAD
C. ATP
D. NADP
Answer» B. NAD
Discussion
15.

Favorable conditions for cyclic photophosphorylation are

A. Aerobic and optimum light
B. Aerobic condition only
C. Aerobic and low light intensity
D. Anaerobic and low light intensity
Answer» B. Aerobic condition only
Discussion
16.

Which of the following about Calvin cycle is correct?

A. It is a metabolic pathway by which plants convert CO<sub>2</sub> into pentose sugars as the main product
B. With decrease in light intensity, the enzymes are more reactive
C. Rubisco adds CO<sub>2</sub> to 3-phosphoglycerate
D. It is a metabolic pathway by which plants convert CO<sub>2</sub> and water into carbohydrates
Answer» E.
Discussion
17.

One of the following is the source of electrons in photosynthesis

A. Carbohydrates
B. CO<sub>2</sub>
C. Water
D. NADH
Answer» D. NADH
Discussion
18.

Which of the following statements about thylakoids is false?

A. They contain chlorophyll pigments
B. They contain the photosystems
C. They contain Calvin cycle enzymes
D. They contain the electron transport machinery
Answer» D. They contain the electron transport machinery
Discussion