Question

Oxysome of mitochondria are concerned with?

• A. Photophosphorylation
• B. Oxidative phosphorylation
• C. Photorespiration
• D. Digestion

Answer 1

The correct option is B

Oxidative phosphorylation

The correct option is B.

Explanation of the correct option:

1. Mitochondrial oxysomes are involved in oxidative phosphorylation which produces ATP..
2. Oxysomes are found in mitochondria's inner membrane.
3. They are also called f0-f1 particles or ATP synthase.
4. Coupling factors are present in an elementary particle's stalk.
5. ATP synthase is present in heads for ATP synthesis.

Explanation of the incorrect option:

Option A:

1. ADP is converted to ATP through the process of photophosphorylation, which uses light energy from photosynthesis.
2. By transferring the phosphate group into the ADP molecule when it is illuminated, energy-dense ATP molecules are created.

Option C:

1. When the enzyme Rubisco oxygenates RuBP, a process known as photorespiration occurs in which some of the energy from photosynthesis is lost.
2. In C3 plants, this mechanism could result in the reduction in photosynthetic yield by decreasing the efficiency of photosynthesis.
3. About 25% of Rubisco reactions result in the oxygenation of RuBP, generating a molecule that cannot be utilized in the Calvin-Benson cycle.
4. A intricate web of enzyme processes called photorespiration transports metabolites between mitochondria, leaf peroxisomes, and chloroplasts.

Option D:

Digestion is known as the breakdown of massive insoluble food particles into tiny water-soluble food particles for absorption into the watery blood plasma.

Final answer: Oxysomes of mitochondria are concerned with oxidative phosphorylation.