Some carotenoids protect chlorophyll from intense light by:
Correct answer: D. Both A and B
- A. Absorbing excessive light energy
- B. Dissipating excessive light energy
- C. Transferring excessive light energy to chlorophyll a
- D. Both A and B
Explanation
Option D is correct.Some carotenoids protect chlorophyll from intense light by both absorbing and dissipating excessive light energy. Carotenoids are a class of organic pigments that are found in plants, algae, and some bacteria. They are responsible for the yellow, orange, and red colors of many fruits and vegetables. Carotenoids are also found in the human body, where they play a role in vision and immunity. In addition to their role in photosynthesis, carotenoids also have a protective role. They can help to protect chlorophyll from damage caused by excess light energy. When chlorophyll absorbs too much light energy, it can become unstable and release free radicals. Free radicals can damage other molecules in the cell, including DNA. Carotenoids can help to quench free radicals, which helps to protect chlorophyll a and other molecules from damage.
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About Bioenergetics
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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