1. Inside our cells, free nucleotides are almost always associated with______.(A)proteins(B)cholesterol(C)CI counterions(D)fatty acids(E) Mg2+ counterions

7.The isoelectronic point of an amino acid is the point where (A)the pKa of the a-carboxylic acid is the same as the pK, of the a-amino group. (B)the a-carboxylic acid is protonated and the a-amino group is unprotonated. (C)the solubility of the amino acid is maximized. (D)the a-carboxylic acid and the a-amino group are both half protonated.(E)the amino acid carries no net electrical charge.

1. Inside our cells, free nucleotides are almost always associated with______.

(A)proteins

(B)cholesterol

(C)CI counterions
(D)fatty acids
(E) Mg²⁺ counterions

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