
(a)
Interpretation:
A mechanism involved in the conversion of cytosine to uracil in the presence of nitrous acid is to be stated.
Concept introduction:
The base pairing in DNA involves the pairing of cytosine with guanine and adenine with thymine. The base pairing in RNA involves the pairing of cytosine with guanine and adenine with uracil.
(b)
Interpretation:
An explanation corresponding to this conversion being mutagenic upon replication is to be stated.
Concept introduction:
The base pairing in DNA involves the pairing of cytosine with guanine and adenine with thymine. The base pairing in RNA involves the pairing of cytosine with guanine and adenine with uracil.
(c)
Interpretation:
The information regarding the presence of thymine in DNA rather than uracil is given. An explanation corresponding to the easy repairing of mutation of cytosine to uracil that is induced by nitrous acid in DNA than in RNA is to be stated.
Concept introduction:
The base pairing in DNA involves the pairing of cytosine with guanine and adenine with thymine. The base pairing in RNA involves the pairing of cytosine with guanine and adenine with uracil.

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Chapter 23 Solutions
Organic Chemistry, Books a la Carte Edition (9th Edition)
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