Multiple choice general knowledge science & technology

What is the main component of bones and teeth?

  1. Calcium carbonate

  2. Calcium phosphate

  3. Calcium sulphate

  4. Calcium nitrate
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B Correct answer
Explanation

Calcium phosphate, specifically in the form of hydroxyapatite, is the primary mineral component of bones and teeth, providing hardness and strength. Bones are about 60-70% mineral (mainly calcium phosphate) and 30-40% organic matrix (collagen). Calcium carbonate is found in seashells, calcium sulfate in gypsum, and calcium nitrate is used in fertilizers.

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