Light Reaction Energetics

Biochemistry · Learn by Concept

Help Questions

Biochemistry › Light Reaction Energetics

1 - 2
1

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

CORRECT

0

0

0

0

Explanation

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.

2

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

The energy from the absorbed light generates NADPH from the electrons of water molecules, ultimately setting up a proton gradient

CORRECT

The energy from the absorbed light moves the electrons from NADPH to water molecules, ultimately setting up a proton gradient

0

The energy from the absorbed light generates NADPH from the electrons of water molecules, ultimately leading to the creation of carbon dioxide

0

The energy from the absorbed light causes all of the electrons in the chloroplast to jump to higher energy levels

0

The energy from the absorbed light causes the generation of NADH from the electron of water molecules, ultimately setting up a proton gradient

0

Explanation

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.