Which of the following is a component of ETS in mitochondria?

• A. Phytochrome
• B. Plastocyanin
• C. Cytochrome oxidase
• D. Carotenoids

The electron transport system (ETS) in mitochondria is crucial for cellular respiration and energy production. Among the options provided, the correct component of the ETS is:

Correct Answer

C. Cytochrome oxidase is a key enzyme in the electron transport chain, playing a vital role in the final step of electron transfer and ATP production.

Other Options Explained

• A. Phytochrome - This is involved in plant photoreception, not in mitochondrial ETS.
• B. Plastocyanin - This protein is part of the photosynthetic electron transport chain in chloroplasts, not mitochondria.
• D. Carotenoids - These are pigments involved in photosynthesis but do not participate in the mitochondrial ETS.

In summary, cytochrome oxidase is the only component listed that is directly associated with the electron transport system in mitochondria.