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        <div id="content-top1">Page 27 - 11-Bio-2 Biological Molecules</div>
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    <pre style="white-space:pre-line"><code>2. Biological Molecules  eLearn.Punjab

Fig. 2.15 Model of DNA. Double helical structure of DNA proposed by Watson & Crick (b). A hypothetical sequence of nucleotides (on
the left side) shows hydrogen bonding between the complementary bases. Note a double boud between A and T, and triple bond
between C and G (a).

The amount of DNA is fixed for a particular species, as it depends upon the number of chromosomes.
The amount of DNA in germ cells (sperms and ova) is one half to that of somatic cells (Table 2.3).

                                                      27 V: 1.1</code></pre>
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