Which of the following statements about the l | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) $1$. The $lac$ operon consists of a regulatory gene $(i)$, a promoter $(p)$, an operator $(o)$, and three structural genes $(z, y, a)$.$2$. The ge

Vedclass · Accepted Answer

Gene $i$ is constitutively expressed

Vedclass · Answer

(A) $1$. The $lac$ operon consists of a regulatory gene $(i)$, a promoter $(p)$, an operator $(o)$, and three structural genes $(z, y, a)$.$2$. The gene $i$ codes for the repressor protein of the $lac$ operon. It is constitutively expressed, meaning it is always transcribed at a constant rate regardless of the presence or absence of lactose.$3$. Lactose acts as an inducer. It binds to the repressor protein, preventing it from binding to the operator, which allows transcription to proceed.$4$. Genes $z, y,$ and $a$ are transcribed together as a single polycistronic mRNA under the control of a single promoter, but gene $i$ has its own separate promoter.$5$. Therefore, the statement that gene $i$ is constitutively expressed is correct.

Which of the following statements about the $lac$ operon is correct?

Similar Questions

What effect would you expect if gene expression of the $lac$ operon were completely repressed?

At which level does the regulation of gene expression occur?

Jacob and Monod studied lactose metabolism in $E. coli$ and proposed the operon concept. The operon concept is applicable to:

An environmental agent that triggers transcription from an operon is a:

Given below is the representation of the $lac$ operon of $E. coli$. Identify $I$ and $II$ from the options given below.

$I$ Promoter $II$ $Z$ $Y$ $A$

Vedclass Test Series

Exam Paper Generator

Online Exam Module