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): In eukaryotes, 5S rRNA is transcribed by RNA polymerase III. Reason (R): RNA polymerase I is responsible for the transcription of all types of ribosomal RNAs. In the light of the above statements, choose the most appropriate answer from the options given below:
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
C. (A) is true but (R) is false
Step-by-step solution
Assertion (A) is true because in eukaryotes, RNA polymerase III is responsible for the transcription of tRNA, 5S rRNA, and snRNAs. Reason (R) is false because RNA polymerase I does not transcribe all types of ribosomal RNAs. It transcribes 28S, 18S, and 5.8S rRNAs, whereas the 5S rRNA is transcribed by RNA polymerase III. Therefore, (A) is true but (R) is false. Answer: (A) is true but (R) is false