Biological Importance of Magnesium and Calcium

Which of the following alkaline earth metal is found in chlorophyll?

An adult body contains about $25 \mathrm{g}$ of $\mathrm{Mg}$ and $12 \mathrm{g}$ of $\mathrm{Ca}$ compared with only $5 \mathrm{g}$ of iron and $0.06 \mathrm{g}$ of copper.

Recall the amount of magnesium and calcium present in human body compared to other metals.

An adult body contains about $25 \mathrm{g}$ of $\mathrm{Mg}$ and $1200 \mathrm{g}$ of $\mathrm{Ca}$ compared with only _____ of iron and $0.06 \mathrm{g}$ of copper.

An adult body contains about how many grams of calcium?

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is