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Which food is the best example of an incomplete protein source (i.e., lacking one or more essential amino acids in sufficient amounts)?
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3. Amino Acids
Essential Amino Acids
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Foods from plant sources usually provide which type of protein with respect to essential amino acid content?
A
Incomplete protein (limiting in one or more essential amino acids)
B
Complete protein (contains all essential amino acids in adequate amounts)
C
Protein that contains only nonessential amino acids
D
Protein that contains only essential amino acids
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Understand the definition of essential amino acids: these are amino acids that the human body cannot synthesize and must be obtained from the diet.
Recognize that a 'complete protein' contains all essential amino acids in adequate amounts necessary for human nutrition.
Know that 'incomplete proteins' lack one or more essential amino acids, making them limiting in those amino acids.
Recall that most plant-based foods provide proteins that are incomplete because they often lack sufficient amounts of one or more essential amino acids.
Conclude that foods from plant sources usually provide incomplete proteins, which are limiting in one or more essential amino acids.
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