Question

Can you match terms related to operons to their definitions? Drag the terms on the left to the appropriate blanks on the right to complete the sentences.

a. Operon

b. Promoter

c. Repressor

d. Regulatory Proteins

e. Operator

f. Co-repressor

g. Inducer

A(n) blank is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway.

The blank is/are arranged sequentially after the promoter.

A(n) blank is a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate site.

A(n) blank codes for a protein, such as a repressor, that controls the transcription of another gene or group of genes.

Regulatory proteins bind to the blank to control the expression of the operon.

A(n) blank is a protein that inhibits gene transcription. In prokaryotes, this protein binds to the DNA in or near the operator.

A(n) blank is a specific small molecule that binds to a bacterial regulatory protein and changes its shape so that it cannot bind to an operator, thus switching an operon on.

Answer 1

An operon is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins. The operator is a specific nucleotide sequence in DNA that binds RNA polymerase. A repressor is a protein that binds to the operator to inhibit gene transcription.

Step-by-step explanation:

An operon is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins. The operator is a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA.

A repressor is a protein that binds to the operator to inhibit gene transcription. The operon can be switched on by an inducer, a small molecule that binds to a bacterial regulatory protein and prevents it from binding to the operator.