2024 Re-NEET Molecular Basis of InheritanceEukaryotic RNA polymerases Medium Question 22 of 200 in Molecular Basis of Inheritance

Given below are two statements: Statement I: In eukaryotes there are three RNA polymerases in the nucleus in addition to the RNA polymerase found in the organelles. Statement II: All the three RNA polymerases in eukaryotic nucleus have different roles. In the light of the above statements, choose the correct answer from the options given below:

A Statement I is correct but Statement II is incorrect
B Statement I is incorrect but Statement II is correct
C Both Statement I and Statement II are correct
D Both Statement I and Statement II are incorrect

The answer is C.

Solution

Eukaryotes have three nuclear RNA polymerases (I, II, III) in addition to the RNA polymerase found in organelles (mitochondria/chloroplast), so Statement I is true. RNA polymerase I transcribes rRNAs, RNA polymerase III transcribes tRNA and other small RNAs, and RNA polymerase II transcribes precursor of mRNA — each has a distinct role, so Statement II is also true.

Concept Eukaryotic RNA polymerases

Molecular Basis of Inheritance in past papers

200 questions from this chapter have appeared across 27 exam years.