The order of transfer of energy is
Correct answer: C. Carotenoids → Chlorophyll b → Chlorophyll a
- A. Carotenoids → Chlorophyll a → Chlorophyll b
- B. Chlorophyll b → Chlorophyll a → Carotenoids
- C. Carotenoids → Chlorophyll b → Chlorophyll a
- D. Chlorophyll a → Chlorophyll b → Carotenoids
Explanation
Option C is correct.The order of energy transfer is carotenoids → chlorophyll b → chlorophyll a.Chlorophyll b absorbs light energy in the blue-green and far-red regions of the spectrum. This energy is then transferred to chlorophyll a, which is the primary pigment involved in photosynthesis.Chlorophyll a then uses this energy to produce ATP and NADPH, two molecules that are essential for photosynthesis.The energy is then transferred to the reaction centre, where the actual chemical reactions of photosynthesis take place.Carotenoids are accessory pigments that help to absorb light energy and transfer it to chlorophyll a. However, they do not directly transfer energy to chlorophyll a. About 50% of energy is initially transferred to chlorophyll b.So, the order of energy transfer is carotenoids → chlorophyll b → chlorophyll a.
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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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