Multiple choice

Sulphur content of protein is

  1. 50-55%

  2. 0-4%

  3. 6-7.3%

  4. 19-24%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sulphur content of proteins is approximately 0-4%. Only two amino acids contain sulphur: cysteine (~2.3% S) and methionine (~3.2% S). Since these constitute a small fraction of total amino acids, the overall sulphur percentage in proteins is very low, making option B correct.

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