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Question

Considering lac operon, match the following:

Column IColumn IIp.Regulatorgenei.Binding site for repressor proteinq.Operator geneii.Code(s)for the protein of the enzymesr.Promoter geneiii.Code(s) for repressor proteins.Structural genesiv.Binding Site for RNA polymerase
 
  1. p-ii, q-i, r-iii, s-iv
  2. p-iii, q-i, r-iv, s-ii
  3. p-iii, q-iv, r-i, s-ii
  4. p-iv, q-i, r-ii, s-iii


Solution

The correct option is B p-iii, q-i, r-iv, s-ii
The regulator gene codes for the repressor protein, while the operator serves as the binding site for this repressor. The promoter is where RNA polymerase binds to, when transcription needs to happen. The structural genes code for the proteins which make up the enzymes needed to digest lactose.

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