NEET 2024 · Class 12

Molecular Basis of Inheritance

Which of the following statement is correct regarding the process of replication in E.coli?

  1. (A)The DNA dependent DNA polymerase catalyses polymerization in one direction that is 3' → 5'
  2. (B)The DNA dependent RNA polymerase catalyses polymerization in one direction, that is 5' → 3'
  3. (C)The DNA dependent DNA polymerase catalyses polymerization in 5' → 3' as well as 3' → 5' direction
  4. (D)The DNA dependent DNA polymerase catalyses polymerization in 5' → 3' direction

The NCERT line that answers it

Verbatim line

The DNA-dependent DNA polymerases catalyse polymerisation only in one direction, that is $5' \rightarrow 3'$ .

Chapter
Molecular Basis of Inheritance
Section
5.4.2 The Machinery and the Enzymes
Page
11
Words matched
12 of 15

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'DNA-dependent DNA polymerases catalyse polymerisation only in one direction, that is 5' → 3'', which directly matches option D and distinguishes it from all other options.

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