10. What is the rule for the
pairing of nitrogen-containing
bases in the DNA molecule?
And in the RNA? Is this last
question appropriate?

Gap-fill exercise

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The rule for the pairing of nitrogen
containing bases of the
chains that form the molecule is
pyrimidine base binds to base,
under the condition that (T)
binds to (A) and (C)
binds to (G).

In RNA there is no between
nitrogen-containing bases. That is
because is formed of only one
chain; differently, DNA is
formed of two chains. It is therefore
correct to question base pairing in RNA.