Multiple Choice
How many amino acids are considered essential because they must be obtained from the diet and cannot be synthesized by the human body?
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3. Amino Acids
Essential Amino Acids
Multiple Choice
How many nonessential amino acids are found in humans?
A
9
B
11
C
8
D
20
Verified step by step guidance1
Step 1: Begin by understanding the concept of nonessential amino acids. Nonessential amino acids are those that the human body can synthesize on its own and do not need to be obtained through the diet.
Step 2: Recall that there are 20 standard amino acids used in protein synthesis. These are divided into essential and nonessential amino acids.
Step 3: Essential amino acids are those that must be obtained through the diet because the body cannot synthesize them. Nonessential amino acids, on the other hand, are synthesized by the body.
Step 4: Review the list of nonessential amino acids in humans. There are 11 nonessential amino acids: alanine, asparagine, aspartate, glutamate, glutamine, glycine, proline, serine, tyrosine, cysteine, and arginine (though arginine is conditionally essential in some cases).
Step 5: Compare the options provided in the problem and identify the correct number of nonessential amino acids in humans, which is 11.
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