Which one of the following is not a carotenoid?
Correct answer: A. Convert light energy into chemical energy
- A. Convert light energy into chemical energy
- B. Protect chlorophyll
- C. Transfer energy
- D. Protect human eye
Explanation
Carotenoids are accessory pigments that have several important roles, including protecting chlorophyll from damage, transferring energy to chlorophyll, and protecting human eyes by absorbing blue light. However, they do not directly convert light energy into chemical energy; this function is primarily performed by chlorophyll and the photosystems within chloroplasts. Thus, the correct answer is the option that states carotenoids do not convert light energy into chemical energy.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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