Question

Which of the following is required both during photosynthesis and respiration?

• A. Phytochrome
• B. Cytochrome
• C. Chlorophyll
• D. Glucose

Answer 1

The correct option is B Cytochrome

Cytochromes are iron-containing protein. It helps in the generation of ATP by oxidative phosphorylation during photosynthesis and respiration. It helps in the transfer of electrons by oxidation and reduction. The iron present in the cytochrome gets converted into Fe${}^{2+}$ into Fe${}^{3+}$. It also transfers electrons between complex III and complex IV during electron transport chain.

So, the correct answer is option B.