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Photosynthesis in Higher Plants
Light and Dark Reactions
1 question from 1 paper, each with its answer.
- question
- 1
- paper
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- of Photosynthesis in Higher Plants
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Concepts tested
- ATP and NADPH link the two phases
All Questions
2002 AIPMT 1 question
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In Photosynthesis energy from light reaction to dark reaction is transferred in the form of : -In the light reaction, light energy absorbed by chlorophyll is converted into chemical energy in the form of ATP (by photophosphorylation) and NADPH.
These are used in the dark reaction (Calvin cycle) to reduce $CO_2$ to carbohydrate: 3 ATP and 2 NADPH are used for each $CO_2$ fixed.
ADP is the low-energy form returned to the light reaction; RuDP is the $CO_2$ acceptor; chlorophyll only traps light.
So energy is transferred from the light reaction to the dark reaction in the form of ATP (along with NADPH).