Practice question

The right choice is B: Phenylpropanoids. In PSS- Sec G- Sec metabolites, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Terpenoids; C) Alkaloids; D) Glucosinolates. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.