Of the following, which one causes higher production of food in green plants?
Correct answer: C. Red
- A. Blue
- B. Orange
- C. Red
- D. Violet
Explanation
Red light is absorbed efficiently by chlorophyll and drives photosynthesis at a high rate, especially near the red absorption peak of chlorophyll a. Blue light is also highly effective, so students may choose blue if they remember the two major absorption regions but overlook that red is the expected single choice here.
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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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