Determine the correctness or otherwise of the following Assertion (a) and the Reason (r): Assertion: Isopropylthiogalactoside (IPTG) is a gratuitous inducer of lactose operon. Reason: Gratuitous inducers are chemical analogs which behave like natural inducers but they do not serve as substrate for the enzymes that are subsequently synthesized. Options: (A) both (a) and (r) are true and (r) is the correct reason for (a) (B) both (a) and (r) are true but (r) is not the correct reason for (a) (C) (a) is true but (r) is false (D) (a) is false but (r) is true
Determine the correctness or otherwise of the following Assertion (a) and the Reason (r):
Assertion: Isopropylthiogalactoside (IPTG) is a gratuitous inducer of lactose operon.
Reason: Gratuitous inducers are chemical analogs which behave like natural inducers but they do not serve as substrate for the enzymes that are subsequently synthesized.
Options:
(A) both (a) and (r) are true and (r) is the correct reason for (a)
(B) both (a) and (r) are true but (r) is not the correct reason for (a)
(C) (a) is true but (r) is false
(D) (a) is false but (r) is true
Answer
Answer: (A) both (a) and (r) are true and (r) is the correct reason for (a)
Explanation: IPTG is indeed a gratuitous inducer of the lactose operon, and gratuitous inducers are chemical analogs that mimic the natural inducer but are not substrates for the enzymes produced.
Sourav
