Question

Manganese is required in

• A. Nucleic acid synthesis
• B. Chlorophyll synthesis
• C. Photolysis of water during photosynthesis.
• D. Plant cell wall formation.

Answer 1

The correct option is C

Photolysis of water during photosynthesis.

The correct option is C.

Explanation for the correct option:

Option C:

1. The breakdown of the water molecule into hydrogen and oxygen occurs when it is exposed to sunlight.
2. PS-II (p680) absorbs light energy during the first phase of photosynthesis.
3. The electrons in chlorophyll get stimulated and are absorbed by the electron acceptor.
4. During the light reaction of photosynthesis, manganese Mn²⁺ is utilized to photolyze water to create oxygen and electrons.
5. In the lit chloroplast, it is the occurrence of water breaking up into hydrogen and oxygen. It functions as a necessary cofactor.

Explanation of incorrect options

Option A:

Protein synthesis requires nucleic acids.

Option B:

The amino acid glutamate, which is abundant in the chloroplast, is used to make chlorophyll.

Option D:

1. Plant cell walls are made up of a variety of components, the majority of which are polysaccharides.
2. Cellulose, non-cellulosic, and pectic polysaccharides, proteins, phenolic chemicals, and water are all common components of the cell wall.

Final answer : Manganese is required in the photolysis of water during photosynthesis.