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14 July, 05:42

Which of these is a regulatory gene?

A. structure of the lac operon. It contains definite structures labeled from A to E. Letter A marks a gen before structural genes.

B. marks a part of the operon that consists of lac Z, lac Y, and lac A genes.

C. indicates a structure that moves along the operon.

D. marks lac l. This part is located before the others in the sequence.

E. indicates a molecule that can bind to structure A.

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  1. 14 July, 06:12
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    Answer:B. Marks a part of the operon that contains lac Z, lac Y and lac A genes

    Explanation: Regulatory genes are which are involved in the controlling of the expression of other genes. So, whether a gene will be expressed is dependent on the presence or absence of these regulatory genes.
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