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Which of the following components is; not; used by both plants and cyanobacteria to carry out photosynthesis?

a. Chlorophyll a
b. Chlorophyll b
c. Carotenoids
d. Phycobilins

1 Answer

4 votes

Final answer:

Chlorophyll b is the component not used by both plants and cyanobacteria to carry out photosynthesis, as cyanobacteria use phycobilins instead.

Step-by-step explanation:

The component not used by both plants and cyanobacteria to carry out photosynthesis is chlorophyll b. Plants and algae have different types of chlorophylls, including chlorophyll a and b. However, cyanobacteria use different accessory pigments called phycobilins instead of chlorophyll b. Although both organisms use chlorophyll a and carotenoids for photosynthesis, the presence of chlorophyll b is unique to plants and some algae, and not found in cyanobacteria.

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