CCP Biology Gene Regulation

Front

What is the function of the tryptophan operon in gene regulation?

Back

The tryptophan operon is turned off when tryptophan is added to the growth medium.

Front

What type of control is exhibited when a gene does not transcribe unless activated by an activator?

Back

Positive control.

Front

What are the components involved when a gene is shut off?

Back

A repressor binds to the operator.

Front

What is epigenetic inheritance?

Back

Inheritance of traits by mechanisms not directly involving nucleotide sequence.

Front

What role do repressors play in negative control of gene expression?

Back

Repressors mediate negative control and result in a decrease in the frequency of transcription.

Front

What is the role of an operator in gene regulation?

Back

The operator is the region where a repressor binds to prevent transcription.

Front

Define gene expression.

Back

Gene expression is the process by which information from a gene is used to synthesize functional gene products, typically proteins.

Front

What is the difference between positive and negative control in gene regulation?

Back

Positive control involves activators that enhance transcription, while negative control involves repressors that inhibit transcription.

Front

How does the presence of tryptophan affect the tryptophan operon?

Back

The presence of tryptophan activates the repressor, turning off the operon.

Front

What is the significance of transcription factors in gene regulation?

Back

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