Nucleotide 1 is the transcription start site and nucleotide

Nucleotide # 1 is the transcription start site and nucleotide #626 is the transcription termination site. What is transcription? What is the name of the enzyme complex that performs transcription? How does this enzyme complex know that nucleotide #1 (A) above is the beginning of the gene (the transcription start site)? Write the sequence of the first 10 nucleotides in the mRNA molecule produced by transcription.

Solution

Answer=

A] Transcription= It is afirst step of gene expression in which a particular segment of DNA is copied into RNA ( mRNA) by enzyme RNA polymerase is called as transcription

B] Enzyme complex that performs trancription is = RNA polymerase

C] The sequence of DNA needed forRNA polymerase bind to template is called as promoter

DNA sequence of promoter region is recognised by RNA polymerase

some strong promoters have an AT rich sequences located in upstream region

D] sequence of first 10 nucleotides produced by transcription

example= T A A T G A G C T A DNA STRAND

A U U A C U C G A U RNA STRAND