NEETZoologyMolecular Basis of Inheritance
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): During transcription, both the strands of DNA are copied into RNA simultaneously. Reason (R): If both strands act as templates, they would code for RNA molecules with different sequences, complicating the genetic information transfer machinery. In the light of the above statements, choose the most
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
D. (A) is false but (R) is true
Step-by-step solution
Assertion (A) is false because during transcription, only one of the two DNA strands is copied into RNA. Copying both strands would lead to the production of two different RNA molecules simultaneously. Reason (R) is true. It correctly states the biological consequence that prevents both strands from being transcribed: if both strands acted as templates, they would code for RNA molecules with different sequences. This means one segment of DNA would code for two different proteins, which would severely complicate the