Which of the following contribute to the regulation of gene expression and, ther
ID: 149791 • Letter: W
Question
Which of the following contribute to the regulation of gene expression and, therefore, the regulation of processes in the cell? Select all that apply.
Question 4 options:
The number of RNA polymerase enzymes that are bound to a gene at one time.
The number of promoters in the coding regions of a gene.
The amount of time before an mRNA molecule is degraded.
The amount of time before a protein is degraded.
The number of ribosomes that are bound to an mRNA at one time.
The number of chromosomes in a cell.
Save
The number of RNA polymerase enzymes that are bound to a gene at one time.
The number of promoters in the coding regions of a gene.
The amount of time before an mRNA molecule is degraded.
The amount of time before a protein is degraded.
The number of ribosomes that are bound to an mRNA at one time.
The number of chromosomes in a cell.
Explanation / Answer
Regulation of gene expression in a cell depends on:-
The number of ribosomes that are bound to an mRNA at one time:- In prokaryotes, many ribosomes bind to the mRNA stretch at a time to enhance the rate of translation. Thus polyribosome binding facilitates speedy translation of proteins and thereby regulate gene expression in a certain way.
In case of ,
The number of RNA polymerase enzymes that are bound to a gene at one time:- At a single time only a single frame of the codons get translated, so only a single RNA polymerase can bind to the promoter of that gene at a single time.
The number of promoters in the coding regions of a gene:- A single gene would be under a single promoter in case of eukaryotes, whereas in prokaryotes a single promoter may control multiple genes (Lac Operon), but in the coding regions of a single gene there would not be more than one promoter. In eukaryotes, under a single specific promoter, the gene is transcribed and then undergo alternative splicing to produce mutiple types of proteins if needed.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.