Target Exam

CUET

Subject

Biology

Chapter

Molecular Basis of Inheritance

Question:

Observe the given figure and answer the question.

RNA polymerase III is responsible for the transcription of which of the following?

Options:

tRNA, rRNA, mRNA

tRNA, 5srRNA, snRNA

5srRNA, tRNA, mRNA

snRNA, rRNA, 5srRNA

Correct Answer:

tRNA, 5srRNA, snRNA

Explanation:

The correct answer is Option (2) - tRNA, 5srRNA, snRNA

In eukaryotes, there are at least three RNA polymerases in the nucleus (in addition to the RNA polymerase found in the organelles). There is a clear cut division of labour. The RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs). The RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).