TREE PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To produce glucose
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To produce NADPH and ATP
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To use ATP
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To produce RuBP
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Detailed explanation-1: -The primary function of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy (ATP and NADPH) will be used by the Calvin cycle (light independent reaction) to fuel the assembly of sugar molecules.
Detailed explanation-2: -In photosynthesis, the role of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine diphosphate) is to carry the energy of the Calvin cycle that occurs in the absence of light. They are also called light-independent reactions.
Detailed explanation-3: -The light reactions capture energy from sunlight, which they change to chemical energy that is stored in molecules of NADPH and ATP. The light reactions also release oxygen gas as a waste product.
Detailed explanation-4: -During photosynthesis light energy is used to split water, generating O2 and electrons that are then used to produce the ATP and NADPH required for carbon fixation.