Question

What does autotrophic nutrition consist of in bacteria?

Answer 1

Autotrophic Nutrition:

The mode of nutrition by which organisms prepare their own food from simple inorganic matter such as water, mineral salts, and carbon dioxide in the presence of sunlight.

Two types of Autotrophic Nutrition:

Photoautotrophic Nutrition:

1. The mode of autotrophic nutrition which takes place in the presence of sunlight is called photoautotrophic nutrition.
2. The green plants are photoautotrophs as produce their own food is called photosynthesis.

Chemoautotrophic Nutrition:

1. The mode of autotrophic nutrition which takes place with the help of chemical energy and without the utilization of sunlight.
2. Many bacteria undergo the oxidation of chemical substances, whether organic or inorganic, to produce chemical energy.

Autotrophic nutrition in bacteria:

1. Autotrophic bacteria produce their own nourishment from inorganic substances.
2. Energy is obtained in this process either from sunlight or chemically through the oxidation of inorganic elements such as iron, sulphur, nitrogen molecules, and so on.
3. Examples of autotrophic bacteria are green sulphur bacteria, purple sulphur bacteria, purple non-sulphur bacteria etc.