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  •  In a DNA molecule     (1)   2’-OH group confers stability to the structure    (2)   2’-OH group is repl

 In a DNA molecule

(1) The 2’-OH group confers stability to the structure.

(2) The 2’-OH group is replaced with an -H group.

(3) There are two strands running parallel in the 5’ to 3’ direction.

(4) Nucleosides form the monomer.

Answers (1)

best_answer

In a DNA molecule,

  1. Incorrect- DNA lacks the 2’-OH group. Its absence gives DNA greater stability than RNA.
  2. Correct - In DNA, the 2’-OH of ribose is replaced with -H, forming deoxyribose. 
  3. Incorrect- DNA strands are antiparallel (one 5’→3’, the other 3’→5’) for proper base pairing.
  4. Incorrect- Nucleotides (not nucleosides) are the true monomers of DNA.

Hence, the correct answer is option 2) The 2’-OH group is replaced with an -H group.

Posted by

Saniya Khatri

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