Biochemistry : Light Reaction Energetics

Study concepts, example questions & explanations for Biochemistry

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Example Questions

Example Question #1 :Photosynthesis

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

Possible Answers:

从absor能量bed light causes the generation of NADH from the electron of water molecules, ultimately setting up a proton gradient

从absor能量bed light causes all of the electrons in the chloroplast to jump to higher energy levels

从absor能量bed light generates NADPH from the electrons of water molecules, ultimately setting up a proton gradient

从absor能量bed light moves the electrons from NADPH to water molecules, ultimately setting up a proton gradient

从absor能量bed light generates NADPH from the electrons of water molecules, ultimately leading to the creation of carbon dioxide

Correct answer:

从absor能量bed light generates NADPH from the electrons of water molecules, ultimately setting up a proton gradient

Explanation:

In photosynthesis, light is absorbed in order to move electrons from water molecules to NADPH. The reduction ofto 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.

Example Question #1 :Light Reactions

光合作用包括上杉达也t phase and a dark phase. The light phase precedes the dark phase and supplies it with__________.

Possible Answers:

Correct answer:

Explanation:

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

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