PLANT PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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give electrons to ATP synthase
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give electrons to chlorophyll
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are used to make sugar in the Calvin cycle
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combine with oxygen to make glucose
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Detailed explanation-1: -Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts). This illustration shows that ATP and NADPH produced in the light reactions are used in the Calvin cycle to make sugar.
Detailed explanation-2: -They are full of energy. Energy in the form of glucose. The energy from sunlight is briefly held in NADPH and ATP, which is needed to drive the formation of sugars such as glucose. And this all happens in the Calvin cycle.
Detailed explanation-3: -In photosynthesis, light energy is used to transfer electrons from chlorophyll to nicotinamide adenine dinucleotide phosphate (NADPH) in photosystem I and produces ATP (Figure 5). This metabolic energy is used to fixate CO2 in the light-independent reactions of photosynthesis (Calvin cycle).
Detailed explanation-4: -Figure 5.14 Light-dependent reactions harness energy from the sun to produce ATP and NADPH. These energy-carrying molecules travel into the stroma where the Calvin cycle reactions take place.
Detailed explanation-5: -ATP and NADPH produced by the light reactions are used in the Calvin cycle to reduce carbon dioxide to sugar. The Calvin cycle is similar to the Krebs cycle in that the starting material is regenerated by the end of the cycle. Carbon enters the Calvin cycle as CO2 and leaves as sugar.