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Which of the following organic compounds is the main constituent of lecithin?

1. Phosphoprotein
2. Arachidonic acid
3. Phospholipid
4. Cholesterol

Correct answer: Phospholipid

Solution

Lecithin is primarily phosphatidylcholine, which is a phospholipid. Phospholipids are major components of cell membranes and have a phosphate-containing polar head plus nonpolar fatty acid tails.

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