Which of the following is an incorrect match of essential element and function? (a) Manganese - Structural component of chlorophyll. (b) Calcium - Component of the middle lamella. (c) Zinc - Enzyme activator. (d) Iron - Component of ferredoxin

 (a) Magnesium is a constituent of the ring structure of chlorophyll. Function of manganese is to activate many enzymes involved in photosynthesis, respiration and nitrogen metabolism. The best defined function of manganese is the splitting of water to liberate oxygen during photosynthesis