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Question

How many of the 20 amino acids are essential amino acids for an adult human?
  1. 6
  2. 9
  3. 12
  4. 10

A
12
B
10
C
6
D
9
Solution
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Essential amino acids cannot be made by the body. As a result, they must come from the food. there are nine amino acids which humans cannot synthesize as phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine and histidine.
Therefore, the correct answer is option B.

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