For each of the following pairs, indicate whether they interact via hydrogen bonds (H) or ionic bonds (I), or do not favorably interact (N). Your answer would be a four-letter string composed of letters H, I, and N only, e.g. HNNI.
( ) ATP and Mg²?
( ) Urea and water
( ) Glucose and the enzyme hexokinase (which uses glucose as a substrate)
( ) A phospholipid tail and inorganic phosphate

Question

For each of the following pairs, indicate whether they interact via hydrogen bonds (H) or ionic bonds (I), or do not favorably interact (N). Your answer would be a four-letter string composed of letters H, I, and N only, e.g. HNNI.
( )	ATP and Mg²?
( )	Urea and water
( )	Glucose and the enzyme hexokinase (which uses glucose as a substrate)
( )	A phospholipid tail and inorganic phosphate

Quizplus · Accepted Answer

ATP is negatively charged and can form ionic bonds with magnesium ions. Urea is highly soluble in water due to its hydrogen-bonding capacity. Similarly, interaction of a polar molecule like glucose with the active site of an enzyme can be mediated by hydrogen bonds and other noncovalent (or even covalent) bonds. In contrast, the fatty acid tails in phospholipids are hydrophobic and do not favorably interact with negatively charged phosphate molecules.

For Each of the Following Pairs, Indicate Whether They Interact