Statement I: Lecithin is a phospholipid. → True
Lecithin (phosphatidylcholine) is a major component of cell membranes.
Statement II: A fatty acid has a carboxyl group attached to an R group. → True
General structure: R–COOH
R = hydrocarbon chain, –COOH = carboxyl group.
But: Statement II does not explain why lecithin is a phospholipid. It only describes the structure of a fatty acid.
Zwitter ions are ionised species of:
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