Question:
Presence of adequate amount of glucose in medium prevents the full expression of genes specifying proteins involved in fermentation of other metabolites in E. coli. This phenomenon is called:
Presence of adequate amount of glucose in medium prevents the full expression of genes specifying proteins involved in fermentation of other metabolites in E. coli. This phenomenon is called:
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Catabolic repression: glucose effect.
Glucose represses lac operon expression.
Mediated by cAMP and CAP.
Glucose represses lac operon expression.
Mediated by cAMP and CAP.
Updated On: Aug 18, 2026
- Catabolic repression
- Anabolic repression
- Catabolic induction
- Anabolic induction
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Gene expression in bacteria is regulated by metabolites.
Glucose has a specific effect on gene expression.
Step 2: Key Formula or Approach:
No specific formula.
Need to understand catabolic repression.
Step 3: Detailed Explanation:
Catabolic repression is the phenomenon where glucose represses the expression of genes.
These genes are involved in the metabolism of other carbon sources.
It is also called glucose effect.
Anabolic repression is not a standard term.
Thus, this phenomenon is catabolic repression.
Step 4: Final Answer:
The phenomenon is catabolic repression.
Hence, the correct option is (A).
Gene expression in bacteria is regulated by metabolites.
Glucose has a specific effect on gene expression.
Step 2: Key Formula or Approach:
No specific formula.
Need to understand catabolic repression.
Step 3: Detailed Explanation:
Catabolic repression is the phenomenon where glucose represses the expression of genes.
These genes are involved in the metabolism of other carbon sources.
It is also called glucose effect.
Anabolic repression is not a standard term.
Thus, this phenomenon is catabolic repression.
Step 4: Final Answer:
The phenomenon is catabolic repression.
Hence, the correct option is (A).
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