Practice question

MCQ

Question

Which of the following statements about the lac operon is correct?

Options

Choose one · Correct answer highlighted

The lac operon is normally active in the absence of lactose. The lac operon is regulated by a repressor protein. Correct The lac operon does not require a promoter sequence. Lactose acts as a repressor in the lac operon.

Explanation

The **lac operon is regulated by a repressor protein**, which prevents transcription in the absence of lactose. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

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