Explain chlorosis and give its cause. Describe the role of copper.
Chlorosis is the condition in which green plants turn yellow. It is caused by the deficiency of elents like N, K, Mg, S, Fe, Mn, Zn and Mo.

Role of copper :

Copper is absorbed as cupric ions (Cu2+). It is essential for the overall metabolism in plants. It is associated with certain enzymes involved in redox reactions.