<p>(a) Write the product when D-glucose reacts with conc.&nbsp;<span class="equation">\(HNO_3\)</span></p>

<p>(b) Amino acids show amphoteric behaviour. Why?</p>

<p>(c) Write one difference between&nbsp;<span class="equation">\(\alpha\)</span>-helix and&nbsp;<span class="equation">\(\beta\)</span>-pleated structure of protein.</p>