Question

Choose the correct option-

All of the following are part of an operon except?

• A. An operator
• B. An enhancer
• C. Structural genes
• D. A promoter

Answer 1

The correct option is B

An enhancer

The correct option is B.

Explanation of correct option

1. Enhancers are short regions of DNA that, on binding to certain activators increase the transcription of that particular gene.
2. An operon refers to the functional unit of DNA where a group of genes is controlled by a single promoter.

Explanation of incorrect option:

Option A,C,D:

Operons consist of the 3 components- promoter, operator, and structural genes.

Final answer: Enhancer is not a part of an operon.