All of the following are part of an operon except

1. an operator

2. an enhancer

3. structural genes

4. a promoter

Doubtly Asked 30 Oct 2026 NEET UG 2018 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 2. an enhancer

Key idea: A prokaryotic operon has structural genes, a promoter and an operator (and a regulatory gene nearby).

An enhancer is a regulatory DNA sequence of eukaryotic genes, not part of an operon.

Answer: option 2.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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