The Expression of the Tryptophan Operon Is Controlled by

question 26

Multiple Choice

The expression of the tryptophan operon is controlled by

• A)a repressor that is active when it binds to tryptophan.
• B)an activator that turns the operon on by binding to DNA.
• C)a repressor that is active when it is alone.
• D)a repressor that is inactive when it binds to lactose.

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Definitions:

Hypothetical Syllogism

A form of logical argument where two conditional statements lead to a conclusion if the first condition is true, then the conclusion follows.

Modus Ponens

A form of logical argument that concludes a certain consequent from a single premise in the form "If P, then Q" and P, therefore Q.

Modus Tollens

A form of deductive argument in logic that, if the implication is true, then denies the consequent to conclude the denial of the antecedent.

Proposition

A declarative sentence that can be evaluated as true or false, conveying a statement or assertion.