Which of the following is not a part of DNA? (CSS 2012 General Science & Ability Paper)

Ribose
Adenine
Thymine
None of these

Nucleotides that make the DNA strands contain deoxyribose sugar, phospate molecule and one nitrogenous base out of adenine, guanine, thymine and cytosine. Uracil is never a part of nucleotide of DNA.
  • Ribose sugar is not a component of DNA. RNA constitutes ribose sugar which is a carbon sugar and is a monosaccharide.
  • In DNA, Adenine, Guanine, Thymine and Cytosine are present whereas in RNA, Adenine, Guanine, Thymine and Uracil are present.

Also check: Which of the following is the part of DNA? (CSS 2012 General Science & Ability Paper)

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