APBio Unit 6 Test Review Part 2

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

• regulator
• repressor
• activator
• corepressor

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

• transcription factors
• topoisomerase
• regulatory genes
• activators

What is the name given to part of a DNA molecule that codes for a protein?

• Glucose
• Chromosome
• Gene
• Phosphate

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform completely different?

• The two different cells become mutated
• The proteins expressed in each cell are different
• They actually have different DNA in the two types of cells.
• The genome of the different cells changes

The process through which cells become specialized in structure and function is

• Transcription
• Gene Expression
• Differentiation 
• RNA Interference

What role do homeobox genes play in cell differentiation?

• They cut double-stranded loops into microRNA.
• They attach to a cluster of proteins to form a silencing complex, which binds to and destroys certain RNA.
• They block certain gene expression.
• They code for transcription factors that activate other genes important in cell development and differentiation.

Two types of negative control are

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

Protein synthesis takes place in two parts:

• Transcription then translation
• Replication then transcription
• Translation then transcription
• Replication then translation

What type of operon is the trp (tryptophan) operon?

• inducible
• repressible
• positive control
• promoible

The lac operon is referred to as a(n) __________ operon.

• inducible

• repressible

• audible

• inaudible