Exam 14: Gene Regulation in Bacteria

A riboswitch only affects translation of an operon.

Allosteric regulation is accomplished by

For these questions, match the following to its appropriate letter. Use each letter only once. A) lacI gene product B) Operator C) Allolactose D) Lac operon E) Trp operon F) Tryptophan -Repressible

Which of the following encode polycistronic mRNA? Check all that apply.

How many promoters are in an operon?

In the lac operon, the operator site is recognized by an activator protein.

A deletion in an operon removes the terminator. How will that affect the transcript that is produced from the operon?

Constitutive genes are those that have constant levels of expression.

The form of regulation that involves a physical change in the shape of an enzyme is called allosteric regulation.

In Jacob, Monod, and Pardee's experiment, what would have been the conclusion if all four tubes produced a yellow color when b-ONPG was added?

Enzymes involved in metabolism are most likely regulated via ________.

In Jacob, Monod, and Pardee's experiment, how many functional copies of lacI were there in the merozygote?

Operons that code for catabolic enzyme systems are typically regulated by repressors.

For these questions, match the following to its appropriate letter. Use each letter only once. A) lacI gene product B) Operator C) Allolactose D) Lac operon E) Trp operon F) Tryptophan -Cis-acting element

What is the gene responsible for attenuation in the trp operon?

What would be the result if the U-rich sequence after the fourth stem loop in the trp operon was replaced by a UG-rich sequence?

The regulation of protein function is called ________.

Negative transcriptional regulation is conducted by activator proteins.

The regulation of the CAP complex using cAMP is an example of inducible genetic regulation.

Translational regulatory proteins recognize specific areas of what molecule?