Name the element which is the main constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure.

The element which is the main constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure is Magnesium.Magnesium is a central atom of porphyrin head in chlorophyll, maintains ring structure of chlorophyll.Generally, at high concentration of Mg++ (0.001M) ions, the subunits of ribosomes are associated. Below this critical level the subunits get separated.