Question

Which one of the following has magnesium?

• A. Vitamin-B
• B. Chlorophyl
• C. Haemocyanin
• D. Carbonic anhydrase

Answer 1

Answer: (B)

Chlorophyl

Answer 2

Formula of chlorophyll is $C_{55}H_{72}Mg N_2O_6$ . So Mg is present in chlorophyll. It is the green colouring matter of leaves and
green stems. Vitamin- $B_{12}$ contains cobalt, haemocyanin contains copper