Multiple choice

Which of the following helps in blood clotting?

  1. Calcium

  2. Boron

  3. Chlorine

  4. Chromium (Cr)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The soluble protein, fibrinogen,in blood plasma is converted into insoluble fibrin, thus preventing blood loss through cuts, etc. Calcium is required for the clotting. 

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