Question

which of the following is the role of calcium in the body.
a it is a component of most organic molecules, in ionic form, it influences the ph of body fluids.
b it is a component of proteins and nucleic acids.
c it is found as a salt in bones and teeth; in ionic form, it is required for muscle contraction, neural transmission.
d it is a major component of both organic and inorganic molecules as a gas, it is essential to the oxidation during which cellular energy is produced
e it is the primary elemental component of all organic molecules.

Explanation:

Calcium is present as a salt in bones and teeth. In its ionic form ($Ca^{2+}$), it plays a crucial role in muscle contraction and neural transmission. Organic molecules mainly contain carbon, hydrogen, oxygen, nitrogen etc. Proteins and nucleic acids do not have calcium as a major component. The gas - essential for cellular energy production is oxygen.

Answer:

C. It is found as a salt in bones and teeth; in ionic form, it is required for muscle contraction, neural transmission