Which of the following are not secondary metabolites in plants?
Morphine, codeine
Amino acids, glucose
Vinblastin, curcumin
Rubber, gums
Amino acids and glucose are primary metabolites in plants.
Primary metabolites are compounds that are directly involved in the growth and development of a plant whereas secondary metabolites are compounds produced in other metabolic pathways that, although important, are not essential to the functioning of the plant.