Answer the following questions: (i). Why is DNA molecule a more stabl

1.	Answer the following questions: (i). Why is DNA molecule a more stable genetic material than RNA ? Explain.(ii). “Unambiguous”, “degenerate” and “universal” are some of the salient features of genetic code. Explain.
Answer» (i) In DNA, presence of thymine at the place of uracil confers more stability to DNA. In RNA, the −OH group is a reactive group that makes RNA labile and degradable, while its absence in DNA makes DNA chemically less reactive and more stable. (ii) Unambiguous: One codon specifies only one particular amino acid hence it is called unambiguous. Degenerate: Some amino acids are coded by more than one codons hence the code is said to be degenerate. Universal: A particular codon coding for an amino acid is same in all organisms except in mitochondria and protozoa.

Answer the following questions: (i). Why is DNA molecule a more stable genetic material than RNA ? Explain.(ii). “Unambiguous”, “degenerate” and “universal” are some of the salient features of genetic code. Explain.

Answer»

(i) In DNA, presence of thymine at the place of uracil confers more stability to DNA. In RNA, the −OH group is a reactive group that makes RNA labile and degradable, while its absence in DNA makes DNA chemically less reactive and more stable.

(ii) Unambiguous: One codon specifies only one particular amino acid hence it is called unambiguous.

Degenerate: Some amino acids are coded by more than one codons hence the code is said to be degenerate.

Universal: A particular codon coding for an amino acid is same in all organisms except in mitochondria and protozoa.

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