alleryStart learning →Which three substrates does photosynthesis require?
ASunlight, carbon dioxide and water
BSunlight, oxygen gas and glucose
CChlorophyll, oxygen gas and water
DChlorophyll, carbon dioxide and heat
Answer & Solution
Correct answer: A. Sunlight, carbon dioxide and water
1. Photosynthesis is a multi-step process requiring sunlight, carbon dioxide and water as substrates.
2. Carbon dioxide is noted as being low in energy at the point where it enters.
3. Oxygen is released as a product rather than taken in as a substrate.
4. Chlorophyll is a pigment that captures light, so it is machinery rather than a substrate consumed.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.1 Overview of Photosynthesis_
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