The number of amino acids that have been found to occur in cells and tissues are:
Correct answer: A. 170
- A. 170
- B. 20
- C. 25
- D. 45
Explanation
About 170 types of amino acids have been found to occur in cells and tissues. Of these, about 25 are constituents of proteins. Most of the proteins are however, made of 20 types of amino acids.
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