DENDROLOGY

TREE PHYSIOLOGY

PHOTOSYNTHESIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is produced by the photolysis of two water molecules?
A
O2 + 4H+ + 4e-
B
O2 + 4H+ + 2e-
C
1/2 O2 + 2H+ + 2e-
D
1/2 O2 + 2H+ + 4e-
Explanation: 

Detailed explanation-1: -Due to the photolysis of water Nascent oxygen is evolved in the lumen of thylakoid. If 2 Molecules of water is splitted then OXYGEN GAS is produced.

Detailed explanation-2: -Water is an important raw material for photosynthesis. During the light reaction, light energy is utilized. By using light energy, water is split to form oxygen, and hydrogen and electron are released. This is known as the photolysis of water.

Detailed explanation-3: -PHOTOLYSIS OF WATER IS A POWERFUL SUPPLIER OF OXYGEN. As a primary and (after the emergence of photosynthesis) additional source of oxygen, the photolytic decomposition of water molecules into atoms or ions of hydrogen and oxygen is subject to analysis.

Detailed explanation-4: -It is the splitting of water molecules in the presence of light into a proton, electron, and oxygen. It occurs in the lumen of thylakoid sacs. Protons are used to reduce NADP and electrons are fed to photosystem II.

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