Which are regulatory elements involved in the regulation of the lac operon?

The activity of the promoter that controls the expression of the lac operon is regulated by two different proteins. One of the proteins prevents the RNA polymerase from transcribing (negative control), the other enhances the binding of RNA polymerase to the promoter (positive control).

What regulatory genes are associated with lac?

The lac operon contains three genes: lacZ, lacY, and lacA. These genes are transcribed as a single mRNA, under control of one promoter. Genes in the lac operon specify proteins that help the cell utilize lactose.

What are the regulatory elements of the genes?

There are several types of gene regulatory elements, including promoters, enhancers, silencers, and insulators (Figure 1). Promoters are located near a gene’s transcription start site and are where the transcription machinery assembles (for an in-depth review of promoters, see 104, 110).

What is gene regulation in lac operon?

Lac Operon – Regulation of Gene Expression. “Gene regulation can be defined as any kind of alteration in the gene to give rise to a different expression which might result in a change in the synthesized amino acid sequence.”

What are the three important features of the lac operon?

The lac operon consists of three structural genes: lacZ, which codes for β-galactosidase, which acts to cleave lactose into galactose and glucose; lacY, which codes for lac permease, which is a transmembrane protein necessary for lactose uptake; and lacA, which codes for a transacetylase that transfers an acetyl group …

Which among the following are the components of lac operon?

The lac operon consists of 3 structural genes, and a promoter, a terminator, regulator, and an operator. The three structural genes are: lacZ, lacY, and lacA. lacZ encodes β-galactosidase (LacZ), an intracellular enzyme that cleaves the disaccharide lactose into glucose and galactose.

What are lac genes?

What are the 3 elements of gene expression?

Regulation of transcription can be broken down into three main routes of influence; genetic (direct interaction of a control factor with the gene), modulation interaction of a control factor with the transcription machinery and epigenetic (non-sequence changes in DNA structure that influence transcription).

Are regulatory elements?

Regulatory elements are binding sites for transcription factors, which are involved in gene regulation. Cis-regulatory modules perform a large amount of developmental information processing. Cis-regulatory modules are non-random clusters at their specified target site that contain transcription factor binding sites.

Which type of regulation takes place in lac operon by repressor?

Assertion :- Regulation of lac operon by repressor is referred to as positive regulation. Reason : Regulation of lac operon can also be visualized as regulation of enzyme synthesis by its product.

Which is not components of lac operon?

So, the correct answer is ‘primer gene’.