A molecule that can act as a genetic material
must fulfil the following
(i) it should be able to generate its
(ii) It should chemically and
structurally be stable.
(iii) It should provide the
scope for slow changes (mutation) that are required for evolution.
(iv) It should be able to
express itself in the form of Mendelian.
Biochemical differences between
DNA and RNA
(i) Both nucleic acid (DNA and
RNA) are able to direct their duplication proteins fails for the first
(ii) RNA is reactive, it also
acts are catalyst, hence DNA is less reactive and structurally more stable than
(iii) Presence of thymine at the
place of uracil also confers additional stability to DNA,
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