Operons, genetic transfer and mutations

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

• inducer protein

• repressor protein

• activator protein

• structural protein

Operons are found in the cells of which of the following types of organisms?

• prokaryotes (bacteria)
• eukaryotes (plant and animals)
• animals only
• viruses

what is an operon?

• a part of a ribsome

• a long piece of mRNA for several proteins

• a unit of DNA containing linked genes that code for proteins needed to do a specific task

• sequence of DNA needed for DNA replication

What is the name of the stretch of DNA on an operon where RNA polymerase binds to initiate transcription?

• operator

• promoter

• enhancer

• origin

The location of an operon that functions as an "on/off" switch and is where a repressor would bind

• promoter

• repressor

• operator

• structural gene

Which of the following describes an operon that is inactive and becomes activated by a molecule binding to the repressor?

• inducible operon

• repressible operon

Which of the following describes an operon that is active and becomes inactivated by a molecule binding to the repressor?

• inducible operon

• repressible operon

The exchange of DNA from one bacterial cell to another due to bacteriophage infection is

• mutation

• transduction

• transformation

• conjugation

When bacteria take up DNA from the environment (outside the cell) and express that DNA in the bacterial cell, this is

• mutation

• transduction

• transformation

• conjugation

The process when DNA is passed from one bacterial cell to another via a direct connection is

• mutation

• transduction

• transformation

• conjugation