What is transcription unit class 12?

Transcription unit consists of mainly the promoter, the structural gene and the terminator. The promoter is present upstream at the five prime end of the structural gene, and RNA polymerase binds to this region and moves along the DNA strand from three prime to five prime direction and codes for the DNA template.

What is a transcription unit quizlet?

What is a transcription unit? a stretch of DNA that encodes a single RNA molecule and other sequences necessary for transcription.

What is the transcriptional unit of a gene?

The RNA coding region, the main component of the transcription unit, contains the actual exons and introns. The terminator, a sequence of nucleotides at the end of the transcription unit, is transcribed along with the RNA coding region.

What is a transcription simple definition?

Listen to pronunciation. (tran-SKRIP-shun) In biology, the process by which a cell makes an RNA copy of a piece of DNA. This RNA copy, called messenger RNA (mRNA), carries the genetic information needed to make proteins in a cell.

What is transcription in chemistry?

The process by which the genetic information encoded in a linear sequence of nucleotides in one strand of DNA is copied into an exactly complementary sequence of RNA.

What is a transcription unit made up of?

The transcription unit is composed of three regions, promoter, structural gene and the terminator. In the structural gene, there are two strand known as the template strand and the coding strand.

What does a transcription unit start with?

TATA boxstarts
starts with TATA boxstarts with palindrome regions and ends with rho factorstarts with promoter region and ends in terminator regionstarts with C A A T region. Solution : (c) : Transcription unit is the distance between sites of initiation and termination by RNA polymerase . It may include more than one gene.

What is the structure of transcription unit?

There are three components of the transcriptional unit which include a promoter, the structural gene, and a terminator. > Promoter: This is present upstream of the structural gene. It is named by the 5′ end (of the coding strand which is the 3′ end of the template strand).

What is the purpose transcription?

Overview of transcription The goal of transcription is to make a RNA copy of a gene’s DNA sequence. For a protein-coding gene, the RNA copy, or transcript, carries the information needed to build a polypeptide (protein or protein subunit).

What is the process of transcription?

Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template.

What do you mean by a transcription unit explain with a diagram?

(i) Promoter: It is the binding site for RNA polymerase for initiation of transcription. (ii) Structural gene: It codes for enzyme or protein for structural functions. (iii) Terminator: It is the region where transcription ends.