What is genetic induction?

[jə¦ned·ik in′dək·shən] (genetics) Gene activation by a molecule that inactivates a repressor protein and thereby activates transcription of one or more structural genes.

What is induction in molecular biology?

The production of an enzyme in response to the presence of a particular compound, i.e. the inducer, or a condition, e.g. heat. Tags: Molecular Biology.

What is an inducer operon?

In molecular biology, an inducer is a molecule that regulates gene expression. The binding of the inducer to the repressor prevents the repressor from binding to the operator. RNA polymerase can then begin to transcribe operon genes.

What controls induction and repression in gene expression?

Induction and repression are related in that they both focus on the binding of a molecule known as RNA polymerase to DNA . Specifically, the RNA polymerase binds to a region that is immediately “upstream” from the region of DNA that codes for a protein. The binding region is termed the operator.

What is a gene repressor?

A repressor is a protein that turns off the expression of one or more genes. The repressor protein works by binding to the gene’s promoter region, preventing the production of messenger RNA (mRNA).

How do inducers and Corepressors affect gene expression?

Repressors and activators are proteins produced in the cell. Both repressors and activators regulate gene expression by binding to specific DNA sites adjacent to the genes they control. Inducers either activate or repress transcription depending on the needs of the cell and the availability of substrate.

What is the function of an inducer in biology?

An agent capable of activating specific genes. A molecule that inhibits the action of the repressor of an operon, preventing it from freely binding with the operator gene and disabling its function.

Is glucose an inducer?

In the lactose operon of Escherichia coli, the final targets of glucose are the lac repressor and the positive regulator, the complex of cAMP receptor protein (CRP) and cAMP. First, glucose prevents the entry of inducer into the cell, resulting in an increase in the concentration of the inducer-free lac repressor.

What is induction and repression?

Enzyme Induction-Repression Enzyme induction refers to the increase in the amount of enzyme protein as a result of some stimulus, whereas enzyme repression refers to a decrease in enzyme after a stimulus. While common in bacterial enzyme regulation, they are observed less often in animal metabolism.

How is induction used to describe gene expression?

Alternatively, the term induction can be used to describe stimulated increases in the expression of specific genes of cellular organisms. In either case, whether gene or prophage induction, what is occurring is an upregulation in gene expression .

Which is an inducer in the induction process?

Enzyme induction is a process where an enzyme is manufactured in response to the presence of a specific molecule. This molecule is termed an inducer. Typically, an inducer molecule is a compound that the enzyme acts upon. In the induction process, the inducer molecule combines with another molecule,…

Which is an effect of the enzyme induction process?

This effect is known as repression. Enzyme induction is a process where an enzyme is manufactured in response to the presence of a specific molecule. This molecule is termed an inducer. Typically, an inducer molecule is a compound that the enzyme acts upon.

What is the meaning of induction in bacteria?

Note that induction is short for “prophage induction” and that prophage induction can also be described as a genetic switch (as in switch in genetic state from a lysognic cycleto a lytic cycleor, more generally, a productive infection).