Tn other words、 an adenine forms one member of a pair on either chain, then on
these assumptions the other member must be thymine : eimilarly for guanine and
ytosine. The sequence of bases on a single chain does not appear to be restricted in
any way. However, only specific pairs of bases can be formed, it follows that 計 the
Sequence of bases on one chain is given, then the sequence on the other chain js
automatically determined.
Tt has been found experimentally that the ratio of the amounts of adenine to thymine。
and the ratio of guanine to cytosine, are always very close to unity for deoxyribose
nucleic acid.
