NDA2019General AbilityGeneral ScienceActual
Tooth enamel is made up of which one of the following calcium compounds ?
Options
- ACalcium carbonate
- BCalcium sulphate
- CCalcium hydroxide
- DCalcium phosphate
Correct answer
D. Calcium phosphate
Step-by-step solution
Tooth enamel is the hardest, most highly mineralized substance in the body. It forms the outer, most visible layer of each tooth. Enamel is composed of hydroxyapatite, a mineral compound of calcium and phosphate Enamel plays a very important role in protecting teeth from decay. Tooth enamel forms a strong barrier that shields the inner layers of teeth from the effects of acids and plaque.