The most important photosynthetic pigment is ___________?
Correct answer: A. Chlorophyll a
- A. Chlorophyll a
- B. Chlorophyll b
- C. Xanthophyll
- D. Carotenes
Explanation
Chlorophyll a is the primary photosynthetic pigment because it is present in the reaction centres and directly converts light energy into chemical energy. Students often choose chlorophyll b because it also absorbs light, but chlorophyll b is an accessory pigment that transfers absorbed energy to chlorophyll a.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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