Practice question
Question
Alkaloids are characterized by presence of:
Explanation
The right choice is B: Nitrogen. 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) Sulfur; C) Phosphorus; D) Chlorine. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.