Which Compound Can Be Synthesized by Plants but NOT by Humans

Question

Which compound can be synthesized by plants but NOT by humans? A) linoleate [18:2($\Delta$^9,12)] B) palmitate (16:0) C) phosphatidylcholine D) pyruvate E) stearate (18:0)

Accepted Answer

Linoleate is an essential fatty acid that must be obtained from the diet or synthesized by plants. Humans cannot synthesize linoleate, but it is found in some vegetable oils and meats from animals that have consumed linoleate in their diet. Palmitate, phosphatidylcholine, pyruvate, and stearate can all be synthesized by both plants and humans.