ReNEET 2026 · Biology · Q167Molecular Basis of InheritanceIn our bank: Exact match · 98%
Which of the following enzymes synthesizes precursor mRNA?
- A.RNA polymerase I
- B.RNA polymerase II✓
- C.RNA polymerase III
- D.DNA polymerase
Correct Answer
(B) RNA polymerase II
Solution & Explanation
In eukaryotes RNA polymerase II transcribes the precursor of mRNA — the heterogeneous nuclear RNA (hnRNA). (RNA pol I makes rRNAs; RNA pol III makes tRNA, 5S rRNA and snRNAs.)
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