Home
Class 12
BIOLOGY
Assertion : In lac operon, a polycistron...

Assertion : In lac operon, a polycistronic structural gene is regulated by a common promoter and regulater.
Reason: It is an example of negative cotrol of transcription initiation.

A

Both Asseration and Reason are true , reason is the correct explanation of assertion

B

Both Assertion and Reason are true, Reason is not the correct explanation of assertion.

C

Assertion is true , Reason is false .

D

Both Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
b
Promotional Banner

Topper's Solved these Questions

  • MOLECULAR GENETICS

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (Answer the following )|29 Videos

  • MOLECULAR GENETICS

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (Answer the following )|29 Videos

  • MICROBES IN HUMAN WELFARE

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (ANSWER THE FOLLOWING)|19 Videos

  • ORGANISMS AND POPULATION

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (IV. Answer the following) |4 Videos

Similar Questions

Explore conceptually related problems

In the lac operon, the structural genes are switched off when

How many structural genes are located in lac operon of E.Coli?

Assertion: Insulin forms hormone receptor complex which regulate gene expression. Reason: Insulin is a peptide hormone which can easily pass cell membrane to interact with hormone-receptor complex.

Assertion : Lac operon is a repressible operon. Reason : The product of gene activity stops the activity of the said gene.

The questions below consists of statements of an Assertion and Reason. Use the following key to choose appropriate answer. If both assertion and reason are correct and reason is the correct explanation of the assertion If both assertion and reason are correct, but reason is not the correct explanation of the assertion If assertion is correct, but reason is incorrect If both assertion and reason are incorrect: Assertin : Both the strands of DNA can be copied during transcription. Reason : The two strands of the DNA in the structural gene of a transcription unit have same polarity.

Assertion : Beating a person with a scale or stick is an example for how momentum is converted into force. Reason : If 'm' is the mass of the scale 'v' is the velocity of the scale (movement), this 'mv' changes, from the initial point to the final point (i.e. hand or body) with respect to time As we know (mv)/(t)=ma((V)/(t))=ma=F This is how momentum is converted into force.

Gene regulation governing lactose operon of E.coli that involves the lac I gene product is

Assertion (A) : Codominace is an example for intragenic interaction Reason (R) : Interaction take place between the alleles of same gene

Assertion (A) : Pleiotropic gene affects multiple traits Reason (R ) : ABO blood group is an example for Pleiotropism