Question

The enzyme that is responsible for most of the DNA synthesis in E. coli is:

• A. DNA Polymerase I
• B. DNA polymerase-II
• C. DNA polymerase-III
• D. RNA polymerase

Hint:

E. coli DNA polymerases:
Pol III: main replicative enzyme.
Pol I: repair, primer removal.
Pol II: repair.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
E. coli has several DNA polymerases.
Each has a specific function in DNA replication.

Step 2: Key Formula or Approach:
No specific formula.
Need to know the roles of DNA polymerases.

Step 3: Detailed Explanation:
DNA polymerase III is the main replicative enzyme.
It is responsible for most of the DNA synthesis.
DNA polymerase I is involved in repair and primer removal.
DNA polymerase II is involved in repair.
RNA polymerase is for transcription.
Thus, DNA polymerase III is responsible for most DNA synthesis.

Step 4: Final Answer:
DNA polymerase III is responsible for most DNA synthesis in E. coli.
Hence, the correct option is (C).