Which of these best describes the structure of lipids?
Lipids are built from building blocks called amino acids.
Lipids are chains or rings of carbon atoms bonded to oxygen or hydrogen.
Lipids are composed of units containing a sugar molecule, a nitrogen-containing base, and a phosphate group.
Lipids have a portion of the molecule that is water-soluble and a portion that is water-insoluble.
Be alert for words like better, best, most, main, major, and primary/primarily in questions. They indicate that there might be other answers that could work, but the correct answer is the one that is the best of the choices given.
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