NEET 2020 · Class 12

Molecular Basis of Inheritance

Which of the following statements is correct?

  1. (A)Adenine pairs with thymine through one H-bond
  2. (B)Adenine pairs with thymine through one H-bond
  3. (C)Adenine does not pair with thymine
  4. (D)Adenine pairs with thymine through two H-bonds

The NCERT line that answers it

Verbatim line

Adenine forms two hydrogen bonds with Thymine from opposite strand and vice-versa.

Chapter
Molecular Basis of Inheritance
Section
5.1.1 Structure of Polynucleotide Chain
Page
2
Words matched
12 of 12

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 'Adenine forms two hydrogen bonds with Thymine', which directly and conclusively proves option D is correct and distinguishes it from all wrong options.

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