Identify the correct option concerning the absorption spectrum of photosynthesis:
Correct answer: A. Chlorophyll absorbs light mainly in the blue and red regions of the spectrum
- A. Chlorophyll absorbs light mainly in the blue and red regions of the spectrum
- B. Chlorophyll absorbs light mainly in the green region of the spectrum
- C. Carotenoids absorb light only in the red region of the spectrum
- D. The absorption spectrum of chlorophyll and the action spectrum of photosynthesis are completely different
Explanation
The correct statement is Option A: Chlorophyll absorbs light mainly in the blue and red regions of the spectrum. This matches the actual absorption characteristics of chlorophyll, which align closely with the regions where photosynthesis is most efficient. Other options are incorrect because chlorophyll does not absorb green light, carotenoids do not absorb only red light, and the absorption and action spectra are similar, not completely different.
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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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