Question

Which pigment is present universally in all green plants?
A. Chlorophyll a
B. Chlorophyll b
C. Chlorophyll c
D. Chlorophyll m

Answer 1

Hint: Green plants contain chlorophyll which is known as the primary photosynthetic pigment. It is present in the chloroplast of plants or photosynthetic bacteria. But the only one pigment which is abundant in nature absorbs sunlight as it has a wide range wavelength for absorption.

Complete answer:
There are various pigments which are responsible for photosynthesis in plants are-
-Carotene- orange in colour.
-Xanthophylls – yellow pigment
-Phaeophyta a- grey-brown pigment.
-Phaeophyta b- yellow-brown pigment
-Chlorophyll a- blue-green pigment
-Chlorophyll b- yellow-green pigment
-Chlorophyll c- red-brown pigment.

These pigments absorb light in different regions of the electromagnetic spectrum.
Chlorophyll b is the pigment present in aerobic photosynthetic organisms. It is not present in anaerobic plants or photosynthetic organisms, hence cannot be considered as the universal pigment.
Therefore, option (b) is incorrect.
Chlorophyll c is the pigment present in marine algae-like red and brown algae. This pigment also does not talk about life other than water.
Therefore, option (c) is not the correct option.
Chlorophyll m is not present in any organism, so this is also not the correct option.
Chlorophyll is called the universal pigment because it is present in all photosynthetic organisms.

Hence, the correct answer is option (A).

Note: The photosynthetic pigments are the primary electron donors in the electron transport chain in eukaryotes as well as proteo-bacteria. Chlorophyll absorbs the blue and the red colour of the electromagnetic spectrum and reflects green colour. It is present in all photosynthetic organisms, hence, known as the universal pigment. Wilstatter, Stoll and Fischer first studied the structure of chlorophyll. It is configured like a tadpole with a porphyrin head and long chain of alcohol ( phytol ).In porphyrin head, four pyrrole rings are linked with methine bridges.