In a phospholipid molecule, the head:

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D Rationale: The head of a phospholipid molecule is hydrophilic and located on the outer side of the bilayer.

The hydrophobic nature pertains to the tails, which repel water, while the head's attraction to water defines its hydrophilic property. The inner side of the bilayer is composed of the hydrophobic tails, which serve to shield from water. Therefore, stating that the head is hydrophobic or is on the inner side contradicts the fundamental structure of phospholipids, which positions the hydrophilic heads outward to interact with the aqueous environment.

HESI A2 Biology Practice Test

In a phospholipid molecule, the head:

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