Question

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

• A. DNA polymerase
• B. RNA polymerase
• C. Reverse transcriptase
• D. DNA ligase

Hint:

Transcription (DNA to RNA) = RNA Polymerase.
Replication (DNA to DNA) = DNA Polymerase.
Translation (RNA to Protein) = Ribosomes.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The process of creating an RNA copy from a DNA sequence is known as **transcription**. This is a fundamental part of the central dogma of molecular biology.
Step 2: Detailed Explanation:
- RNA polymerase is the enzyme that binds to a DNA promoter and synthesizes a complementary RNA strand (mRNA, tRNA, or rRNA) by adding ribonucleotides.
- DNA polymerase (Option A) synthesizes DNA from a DNA template during replication.
- Reverse transcriptase (Option C) synthesizes DNA from an RNA template (the reverse of the standard process).
- DNA ligase (Option D) is an enzyme that "glues" DNA fragments together.
Step 3: Final Answer:
RNA polymerase is the enzyme specifically responsible for synthesizing RNA using a DNA template.