Gene Regulation and Expression 24

Front

What is the role of lactase in E. Coli?

Back

Lactase is an enzyme that E. Coli uses to digest lactose.

Front

Define gene expression.

Back

Gene expression is the process by which the instructions in DNA are converted into a functional product, typically a protein.

Front

What happens to the lac operon when lactose is present but glucose is absent?

Back

The lac operon is activated, leading to the production of lactase.

Front

What is the function of a repressor in gene regulation?

Back

A repressor inhibits gene expression by slowing down transcription.

Front

Which cells in an organism share the same DNA sequence?

Back

All cells in an organism, except for red blood cells, contain the same DNA sequence.

Front

What is the lac operon?

Back

The lac operon is a set of genes in E. Coli that are involved in the metabolism of lactose.

Front

How does glucose affect the lac operon?

Back

When glucose is present, the lac operon is repressed, preventing the production of lactase.

Front

What is transcription in the context of gene expression?

Back

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

Front

What is the difference between transcription and translation?

Back

Transcription is the synthesis of RNA from DNA, while translation is the process of synthesizing proteins from RNA.

Front

What is an operon?

Back

An operon is a cluster of genes under the control of a single promoter, functioning together in a regulatory manner.