Question

Which enzyme is responsible for the synthesis of RNA from a DNA template?

• A. DNA polymerase
• B. RNA polymerase
• C. Ligase
• D. Helicase

Hint:

Transcription → RNA polymerase → DNA → RNA.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Transcription is the first step of gene expression, where the information in a DNA sequence is copied into a complementary RNA molecule.
Step 2: Detailed Explanation:
RNA polymerase is the enzyme that carries out transcription.
It binds to the DNA at a promoter site, unwinds the double helix, and adds ribonucleotides (A, U, G, C) to form an RNA strand based on the DNA template.
DNA polymerase is used for DNA replication (DNA to DNA).
Helicase unwinds the DNA strands during replication.
Ligase seals nicks in the DNA backbone.
Step 3: Final Answer:
The enzyme responsible for RNA synthesis is RNA polymerase.