Practice question
Question
Cytokinins can exist in plants as all EXCEPT:
Explanation
The right choice is D: Fatty acid esters. In Cytokinin, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Free bases; B) Ribosides; C) Ribotides. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.