Which of the Following Is Least Likely to Be Observed $\beta$

question 37

Multiple Choice

Which of the following is least likely to be observed in a nonmutant bacterial cell?

• A) Presence of \(\beta\)-galactoside transacetylase at a high concentration when \(\beta\)-galactoside is present at a low concentration
• B) Production of \(\beta\)-galactoside transacetylase at very low levels in the absence of lactose
• C) Production of \(\beta\)-galactoside transacetylase at very low levels when glucose is abundant
• D) Production of \(\beta\)-galactoside transacetylase at high levels when lactose is at a high concentration and glucose is not available
• E) Presence of both \(\beta\)-galactoside transacetylase and \(\beta\)-galactoside in very low concentrations

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Definitions:

Lac Repressor

A protein that binds to the lac operon and inhibits the metabolism of lactose in bacteria.

RNA Polymerase

An enzyme responsible for synthesizing RNA molecules from DNA templates, playing a crucial role in gene expression and regulation.

Promotor

A region of DNA that initiates transcription of a particular gene, crucial for regulating gene expression.

Genetic Code

The set of rules by which information encoded in genetic material (DNA or mRNA sequences) is translated into proteins by living cells.