Question

A metal present in \[{{B}_{12}}\]is:
A) Aluminium
B) Zinc
C) Iron
D) Cobalt

Answer 1

Hint:As we know that the other name for vitamin \[{{B}_{12}}\] is cobalamin. It is considered as the most important and a complex vitamin of all. The vitamins have the tendency to get synthesised by bacteria so it is commonly present in the animal products. In the physical body two sorts of \[{{B}_{12}}\] are used.

Complete answer:
The \[{{B}_{12}}\]vitamin or the cobalamin vitamin is the complex structure and the largest and most structurally complex vitamin. The vitamins existed in the four near identical chemical forms are the cyanocobalamin, hydroxocobalamin, adenosylcobalamin and methylcobalamin. The chemicals out of them which are used for treating vitamin deficiency are cyanocobalamin and hydroxocobalamin. When these are absorbed by the body they get converted into adenosylcobalamin and methylcobalamin which are the forms which exhibit the physiological activity. All of the vitamins \[{{B}_{12}}\] have a biochemically rare element cobalt positioned within the center of a corrin ring. The vitamin \[{{B}_{12}}\] helps in the formation of red blood cells, bone marrow, in the metabolism of carbohydrates, proteins, fats and in the production of genetic materials. It helps in the synthesis of deoxyribonucleic acid that the DNA.

Hence,the correct option is D.

Note:It also helps in assisting the nervous system mechanism and the cardiovascular mechanisms. The deficiency of vitamin \[{{B}_{12}}\] can cause exhaustion,irritation and shortness of breath. The sole organism which supplies vitamin \[{{B}_{12}}\] is bacteria and archaea. The grain based foods are also prepared by adding vitamin to them.