Statement A: All amino acids involved in protein synthesis are called essential amino acids.
Statement B: A cell has only 20 different types of amino acids.

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Statement A is correct and B is incorrect.

Both statements A and B are incorrect.

Statement A is incorrect and B is correct.

Both statements A and B are correct.

answer is B.

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Detailed Solution

Only certain amino acids involved in protein synthesis and not synthesized by human body but obtained through diet are called essential amino acids. These are Arginine, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenyl Alanine, Threonine, Tryptophan and Valine. The remaining 10 are called non-essential amino acids involved in protein synthesis. There are more than 20 different types of amino acids in a cell.

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