<u>Nitrogen</u> is found in proteins but not in carbohydrates. It is present in all amino acids as it the building block of amino acids.
(by Benjemin)
<em>Enzymes</em><em>-</em><em> </em><em>are</em><em> </em><em>proteins</em><em> </em><em>which</em><em> </em><em>function</em><em> </em><em>as</em><em> </em><em>biol</em><em>og</em><em>ical</em><em> </em><em>catalysts</em><em> </em>
<em>so</em><em>,</em><em> </em><em>the </em><em>answer</em><em> </em><em>is</em><em> </em><em>that</em><em> </em><em>they</em><em> </em><em>are</em><em> </em><em>proteins</em><em>.</em>
Both represent physical weathering.
<span>If some of the people chose to drink the water from the supplying line broken without boiling, they are in risk to get ill due to the presence of bacteria. Boiling water is a safe measure to kill most bacteria and should be used to avoid diseases caused by bacteria present in contaminated water. </span>
