Question

Is Rhizobium aerobic or anaerobic?

Answer 1

Aerobic respiration:

1. It occurs in the presence of oxygen in the mitochondria.
2. It occurs in plants as well as animals.
3. The complete breakdown of glucose takes place in carbon dioxide and water.
4. 38 ATP molecules are produced as the final product.

Anaerobic respiration:

1. It takes place in the absence of oxygen in the cytoplasm.
2. Incomplete oxidation of food takes place.
3. It occurs in yeasts, certain bacteria, and fungi.
4. During anaerobic respiration, glucose is first broken down to pyruvic acid, and then the further breakdown of pyruvic acid is different in different plants.
5. 2 ATP molecules are produced as the final product.

Rhizobium:

1. Rhizobium is a motile rod-shaped proteobacterium.
2. It is an aerobic, free-living soil organism that infects leguminous plants.
3. It contains a nitrogenase enzyme that fixes nitrogen.
4. However, the nitrogenase enzyme is sensitive to oxygen.
5. Therefore another protein called leghemoglobin is there that controls oxygen levels.