question_answer

Which of the following is not a correct pairing of a macronutrient and the major functions it performs in the life of a plant?

A) Potassium-enzyme activation, water balance, ion balance.

B) Calcium-activity of membranes and cytoskeleton, second messenger.

C) Sulphur-in proteins and coenzymes.

D)  Iron-in active sites of many redox enzymes and electron carriers.