The order in which the amino-acids are placed within the polypeptide determines the tertiary structure and therefore the function of the given protein. Amino acids have different functional groups like methyl(CH3), phenyl(C6H5). Those functional groups can interact with molecules like glucose determining reactions, the proteins that catalyze reactions are called enzymes. Other functional groups of amino acids can be the sulfate groups. For example, insulin has 2 polypeptide chains(Chain A has 21 amino acids, and chain B, 30). Between the two polypeptide chains, 2 disulfide bonds form altering its shape.
Answer:
<em>The</em><em> </em><em>fi</em><em>rst</em><em> </em><em>option</em>
Explanation:
<em>The</em><em> </em><em>cell</em><em> </em><em>membrane</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>st</em><em>r</em><em>u</em><em>c</em><em>t</em><em>u</em><em>r</em><em>e</em><em> </em><em>that</em><em> </em><em>forms</em><em> </em><em>the</em><em> </em><em>surf</em><em>ace</em><em> </em><em>of</em><em> </em><em>a</em><em> </em><em>cell</em><em> </em><em>separating</em><em> </em><em>it's </em><em>contents</em><em> </em><em>from</em><em> </em><em>the</em><em> </em><em>out</em><em>side</em><em> </em><em>world</em><em>.</em>
Explanation:
Atoms involved in covalent bonding do not separate into ions. Ionic and covalent bonds differ in the degree of sharing of the electron densities between them. Covalent bonds share the electrons more equally and are stronger. Ionic bonds share the electrons very unequally and can be broken into ions
