Light Reaction Energetics - Biochemistry

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Question

In photosynthesis, what is the purpose of absorbing light into chloroplasts?

Answer

In photosynthesis, light is absorbed in order to move electrons from water molecules to NADPH. The reduction of to NADPH is accompanied by the movement of protons across a membrane which sets up a gradient similar to that of oxidative phosphorylation. The protons eventually run through ATP synthase and ATP is formed.

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Question

Photosynthesis consists of a light phase and a dark phase. The light phase precedes the dark phase and supplies it with __________.

Answer

During photosynthesis, the light phase is responsible for creating which the dark phase then consumes as a part of its process. In addition to is used in the dark phase as a high energy substrate to work properly.

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