Q431
In photosynthesis, oxygen is liberated during
A.
Hydrolysis of carbohydrates
B.
Breakdown of proteins
C.
Reduction of CO2
D.
Hydrolysis of water
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
In photosynthesis, oxygen is liberated during Hydrolysis of water.Two water molecules are oxidized by the energy of four successive charge-separation reactions of photosystem II to yield a molecule of diatomic oxygen and four hydrogen ions.
The electrons yielded are transferred to a redox-active tyrosine residue that is oxidized by the energy of P680+. In light, the electron acceptor is reduced and oxygen is evolved.