Classify each amino acid by the chemical properties of its side chain (r group) at ph 7 . select the amino acid that fits best in each category. each amino acid will be selected only once. which amino acid has a positively charged r group? lysine which amino acid has a negatively charged r group? glutamate which amino acid has a neutral polar r group? glutamine which amino acid has a nonpolar aliphatic r group? which amino acid has an aromatic r group?

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.