Question

The metal present in Vitamin ${B_{12}}$ is.
A) Magnesium.
B) Cobalt.
C) Copper.
D) Zinc.

Answer 1

Hint: We know that Vitamin ${B_{12}}$ is also mentioned as cobalamin, because it contains a metal ion (cobalt). This makes it the most important and most complex vitamin of all. The vitamin can only be synthesized by bacteria and thus is especially present in animal products. Two sorts of Vitamin ${B_{12}}$ are utilized in the physical body.

Complete answer:
Now, we see the structure of Vitamin ${B_{12}}$ is,

As we know that the Vitamin B12, also called cobalamin, It is the largest and most structurally complex vitamin. The vitamin exists in four near-identical chemical forms,
-Cyanocobalamin
-Hydroxocobalamin
-Adenosylcobalamin
-Methylcobalamin.
Cyanocobalamin and hydroxocobalamin are used to treat vitamin deficiency; once absorbed by the body they're converted into adenosylcobalamin and methylcobalamin, which are the forms that have physiological activity. All sorts of Vitamin ${B_{12}}$ contain the biochemically rare element cobalt positioned within the center of a corrin ring.
Therefore option B is correct.

Additional Note:
Functions of Vitamin ${B_{12}}$ :
We have to remember that the Vitamin ${B_{12}}$Contributes to the formation of red blood cells and bone marrow, the metabolism of carbohydrates, fats and proteins and therefore the production of genetic materials. It also assists nervous and cardiovascular mechanisms and plays a task in DNA synthesis.
Deficiency:
We must remember that the deficiency of this vitamin may cause anemia, exhaustion, irritation, depression, shortness of breath, difficulty walking, amnesia, mood swings, disorientation, dementia and constipation. This is often estimated to affect 10-15% of people over the age of 60. This is often a result of malfunction of the stomach, pancreas or intestine of elderly people, decreasing adsorption of the vitamin.

Note:
We must know that the sole organisms to supply Vitamin ${B_{12}}$ are certain bacteria and archaea. Most omnivorous people obtain enough Vitamin ${B_{12}}$ by consuming animal-sourced foods, including meat, fish, fowl, milk and eggs. Grain-based foods are often prepared by having the vitamin added to them.