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Question

Which of the following pairs of amino acids are considered as the semi essential amino acids?

A
Lysine, arginine, histidine
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B
Aspartic acid, glutamic acid
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C
Phenylalanine, tyrosine, tryptophan
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D
Arginine, histidine
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Solution

The correct option is C Phenylalanine, tyrosine, tryptophan
Essential amino acids are those that are not synthesized by our body and have to be taken in through the diet. These amino acids include phenylalanine, valine, threonine, tryptophan, isoleucine, methionine, histidine, arginine, lysine and leucine.

Non essential amino acids are those that are synthesized in our body. They include aspartic acid, alanine, glycine, glutamic acid, asparagine, cysteine, glutamine, tyrosine, proline and serine.

Among the ones included under essential amino acids, arginine and histidine are considered to be semi essential amino acids.


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