The dark reactions of photosynthesis are independent of light. However, if plants are deprivedof light, then dark reactions would NOT occur because they need some molecules to proceedwith, which form in the presence of light.These molecules areA. ADP and NADP.B. water and oxygen.C. ATP and NADPH.D. glucose and oxygen
Question
The dark reactions of photosynthesis are independent of light. However, if plants are deprivedof light, then dark reactions would NOT occur because they need some molecules to proceedwith, which form in the presence of light.These molecules areA. ADP and NADP.B. water and oxygen.C. ATP and NADPH.D. glucose and oxygen
Solution
The correct answer is C. ATP and NADPH.
Here's the step by step explanation:
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Photosynthesis consists of two stages: the light-dependent reactions and the light-independent reactions (also known as the dark reactions or the Calvin cycle).
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The light-dependent reactions occur in the thylakoid membranes of the chloroplasts where light energy is converted into chemical energy in the form of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).
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The ATP and NADPH produced in the light-dependent reactions are then used in the light-independent reactions (dark reactions) to convert carbon dioxide into glucose.
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Therefore, even though the dark reactions do not directly require light, they are dependent on the products of the light reactions (ATP and NADPH). Without light, the light-dependent reactions cannot occur, and ATP and NADPH will not be produced. As a result, the dark reactions will not be able to proceed.
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