Which one of the following is a true statement comparing phospholipids and triacylglycerols (fats and oils)?
A. Both molecules contain a phosphate group.
B. Triacylglycerols may be saturated or unsaturated, but all phospholipids are saturated.
C. Phospholipids are the primary storage form for fats in our bodies.
D. Phospholipid molecules have a distinctly polar "head" and a distinctly nonpolar "tail," whereas triacylglycerols are predominantly nonpolar.
E. In nature, phospholipids occur in fused rings (sterol form), whereas triacylglycerols maintain a straight-chain form.
Ans: D. Phospholipid molecules have a distinctly polar "head" and a distinctly nonpolar "tail," whereas triacylglycerols are predominantly nonpolar.
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