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WAEC Biology 2010 Question 12

Question 12

Support and Movement

The inorganic components of bone consist of

  1. A.magnesium, sodium and calcium.
  2. B.magnesium, phosphorus and calcium.
  3. C.sodium, phosphorus and calcium.
  4. D.potassium, magnesium and calcium.
Show the answer and explanation

Answer: B (magnesium, phosphorus and calcium.)

Explanation

Bone's hardness comes mainly from calcium phosphate, with some magnesium salts.