Principle Of Inheritance And Variation Question 358
Question: Assertion : Regulator and operator genes are not associated with constitutive genes. Reason : Constitutive genes need not be repressed.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: A
Solution:
Regulator gene controls the operator gene in cooperation with a chemical compound called inducer present in the cytoplasm.
The regulation gene codes for and produce a protein substance called repressor.
The repressor substance combines with the operator gene to repress its function.
Therefore it is called regulator gene.
The constitutive genes keep on functioning all the time.
They need not be repressed.
Therefore, the regulator and operator genes are not associated with them.
BETA
