Gene Expression

Front

What is gene expression?

Back

Gene expression is the process by which information from a gene is used to synthesize a functional gene product, usually a protein.

Front

What is an operon?

Back

An operon is a cluster of genes under the control of a single promoter, which can be regulated together.

Front

What is a repressible operon?

Back

A repressible operon is a type of operon that is normally active but can be turned off by a repressor molecule.

Front

What is a corepressor?

Back

A corepressor is a small molecule that binds to a repressor protein and activates it, leading to the repression of gene expression.

Front

What role does RNA polymerase play in gene expression?

Back

RNA polymerase is the enzyme that synthesizes RNA from a DNA template during transcription.

Front

What is the difference between muscle cells and nerve cells despite having the same DNA?

Back

Muscle cells and nerve cells express different proteins, which leads to their distinct functions and appearances.

Front

What is a gene?

Back

A gene is a segment of DNA that contains the instructions for making a specific protein.

Front

How do environmental factors influence gene expression?

Back

Environmental factors can affect the regulation of gene expression by altering the activity of transcription factors and other regulatory proteins.

Front

What determines the information in a DNA molecule?

Back

The information in a DNA molecule is determined by the order (sequence) of the nitrogen bases.

Front

What is transcription?

Back

Transcription is the process of copying a segment of DNA into RNA.