Explore topic-wise MCQs in Biology.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

Which is false regarding chlorophyll a and b?

A. Chlorophyll b is an accessory pigment
B. Chlorophyll is the main chief pigment
C. Chlorophyll a is more than chlorophyll b
D. Both are present in equal proportion
Answer» E.
Discussion
2.

The size of the chlorophyll molecule is Head: 20 x 20 A°, Tail: 15 A°

A. True
B. False
Answer» C.
Discussion
3.

How many numbers of chlorophyll are present in a photosynthetic unit?

A. 100 – 150
B. 90
C. 200 – 250
D. 300 – 350
Answer» D. 300 – 350
Discussion
4.

What is the empirical formula of chlorophyll b?

A. C55H70O6N4Mg
B. C55H72O5N4Mg
C. C55H79O7N4Mg
D. C55H80O6N5Mg
Answer» B. C55H72O5N4Mg
Discussion
5.

Who found out that the pigment chlorophyll is found in the chloroplast in plant cells?

A. Robert Hill
B. Hugo de Vries
C. Julius Von Sachs
D. C. Van Neil
Answer» D. C. Van Neil
Discussion
6.

Chlorophyll is soluble in water.

A. True
B. False
Answer» C.
Discussion
7.

Methyl group is mainly present in which photosynthetic pigment?

A. Chlorophyll b
B. Xanthophyll
C. Carotenoids
D. Chlorophyll a
Answer» E.
Discussion
8.

Which of the following is the main function of carotenes?

A. Not an accessory pigment
B. Photooxidation
C. Helps in photosynthesis
D. Helps in transpiration
Answer» C. Helps in photosynthesis
Discussion
9.

Which is the correct color matching in chromatogram?

A. Chlorophyll a – yellow-green
B. Chlorophyll b – yellow-orange
C. Xanthophyll – yellow
D. Carotenoids – bright or blue-green
Answer» D. Carotenoids – bright or blue-green
Discussion
10.

Which of the following is not an accessory pigment?

A. Chlorophyll a
B. Bacteriochlorophyll
C. Chlorophyll b
D. Phycobilin
Answer» B. Bacteriochlorophyll
Discussion