Which one of the following is catabolized during endogenous metabolism in a batch bacterial cultivation?

Q. Which one of the following is catabolized during endogenous metabolism in a batch bacterial cultivation?

(A) internal reserves

(B) extracellular substrates

(C) extracellular products

(D) toxic substrates

Ans: internal reserves

Solution:

During endogenous metabolism in a batch bacterial cultivation, internal reserves are catabolized. Endogenous metabolism occurs when the extracellular substrates in the culture medium are depleted, and the bacteria start utilizing their internal reserves as a source of nutrients for survival and growth.

In a batch culture, the bacteria are grown in a closed system with a limited supply of nutrients. As the cultivation progresses and the extracellular substrates are consumed, the bacteria may switch to using their internal reserves, such as stored glycogen, lipids, or other intracellular compounds, as an energy source to sustain their metabolic activities.