AP Biology Regulation and Gene Expression

What does a promoter do?

• it allows a gene (or genes) to be transcribed
• it creates a DNA segment
• it is another word for ribosomes
• it is another word for RNA

An operon consists of all the the following EXCEPT

• operator
• promoter
• regulatory gene
• genes of the operon (gene cluster)

A protein that binds to the operator and blocks the RNA polymerase

• regulator
• repressor
• activator
• corepressor

The "on/off" switch for an operon is called the

• promoter
• repressor
• operator
• gene

A small molecule that binds to a repressor and makes it ACTIVE is a

• repressor
• regulator
• activator
• corepressor

A small molecule that binds to the repressor and makes it INACTIVE is a

• corepressor
• inducer
• promoter
• operator

When something sticks to the DNA to turn off gene expression, this is considered:

• negative control
• positive control
• regular control
• unleaded control

When a gene is transcribed when turned on by activator that sticks to DNA or changes the shape of a molecule already attached, it is considered _____ control

• positive

• negative

• "out of"

• ground

Two types of negative control are

• repressible & inducible
• repressible & active
• active & inactive
• repressible & corepressible

Inducible negative control is when the gene cluster is transcribed when there is the ____ of a specific molecule from a metabolic pathway.

• presence
• absence