UTRs are found both before the start codon (5-prime UTR) and after the stop codon (3-prime UTR) and are essential for efficient translation.
Question 202 of 668
📘 CLASS XII
In the Lac Operon, the regulator gene (i gene) codes for?
The 'i' gene (inhibitor) codes for the Repressor protein which binds to the operator to block transcription in the absence of an inducer.
Question 203 of 668
📘 CLASS XII
Lactose functions as an Inducer by binding to the?
Lactose (allolactose) binds to the Repressor protein, causing a conformational change that prevents the repressor from binding to the operator, thus turning the operon on.
Question 204 of 668
📘 CLASS XII
The gene 'lac Z' codes for which enzyme?
The lac Z gene codes for Beta-galactosidase, which hydrolyzes lactose into glucose and galactose.
Question 205 of 668
📘 CLASS XII
The gene 'lac Y' codes for which enzyme?
The lac Y gene codes for Permease, which increases the permeability of the bacterial cell to lactose.
Question 206 of 668
📘 CLASS XII
The gene 'lac A' codes for which enzyme?
The lac A gene codes for Transacetylase.
Question 207 of 668
📘 CLASS XII
The Lac Operon is an example of?
It is an inducible system because it is normally off but can be induced (turned on) by the presence of lactose.
Question 208 of 668
📘 CLASS XII
Which molecule serves as the inducer in the Lac Operon?
Lactose (or Allolactose) acts as the inducer that inactivates the repressor.
Question 209 of 668
📘 CLASS XII
The Human Genome Project (HGP) used two major approaches: ESTs and?
The two approaches were Expressed Sequence Tags (identifying expressed genes) and Sequence Annotation (sequencing the whole genome and assigning functions).
Question 210 of 668
📘 CLASS XII
Approximately how many genes were estimated to be in the human genome by HGP?
The HGP found approximately 30,000 genes, which was much lower than the earlier estimates of 80,000-140,000.
