IB Biology D2.2 Gene Expression

Front

What is the proteome of a cell?

Back

The full set of proteins expressed in a cell.

Front

How does methylation of the promoter affect gene expression?

Back

Represses transcription.

Front

In bacteria, what is the role of lactose in regulating the lac operon?

Back

It binds to the repressor, allowing transcription to occur.

Front

What is an enhancer?

Back

A DNA sequence that increases transcription.

Front

Which example demonstrates environmental effects on gene expression?

Back

Alteration of methyl tags due to air pollution.

Front

What is gene expression?

Back

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

Front

What is the difference between the genome and the proteome?

Back

The genome is the complete set of DNA in an organism, while the proteome is the full set of proteins expressed by the genome.

Front

What role do transcription factors play in gene expression?

Back

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

Front

What is the function of a promoter in gene expression?

Back

A promoter is a DNA sequence that initiates transcription of a gene.

Front

How does alternative splicing affect gene expression?

Back

Alternative splicing allows a single gene to produce multiple proteins by including or excluding certain sequences.