Question

Which of the following acts as electron carrier in both photosynthesis and respiration?

• A. F${}_1$ region
• B. Phytochrome
• C. Cytochrome
• D. Cryptochrome

Answer 1

Answer: (C)

Cytochrome

Cytochrome acts as an electron carrier in both photosynthesis and respiration. Cytochromes are, thus, capable of performing oxidation and reduction. Because the cytochromes (as well as other complexes) are held within membranes in an organized way, the redox reactions are carried out in the proper sequence for maximum efficiency.

Whereas, phytochromes and cryptochromes are photoreceptors, having different functions.

F${}_1$ region is part of the ATP synthase complex and hydrolyzes ATP.

Therefore, the correct answer is option C.