Gene Regulation and Expression, and Mutation

Front

Where do mutations occur?

Back

Mutations occur in DNA.

Front

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

Back

Transcription factors.

Front

Genes can be shut off (not expressed) when a ___ binds to the ____.

Back

Repressor binds to the operator.

Front

What does a promoter do?

Back

It allows a gene to be transcribed.

Front

Which of the following best describes a mutagen?

Back

An agent which can change the structure of DNA, causing a mutation.

Front

What is gene regulation?

Back

Gene regulation is the process of turning genes on and off to control gene expression.

Front

What is the role of RNA polymerase in transcription?

Back

RNA polymerase synthesizes RNA from a DNA template during transcription.

Front

Define transcription factors.

Back

Transcription factors are proteins that regulate the transcription of genes by binding to nearby DNA.

Front

What is an operator in gene expression?

Back

An operator is a segment of DNA that a repressor binds to, inhibiting transcription.

Front

What is a corepressor?

Back

A corepressor is a molecule that binds to a repressor and enhances its ability to inhibit transcription.