Q. What is the fate of excess amino acids in the body?
-
A.
Stored as proteins
-
B.
Converted to glucose
-
C.
Converted to fatty acids
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D.
Excreted unchanged
Solution
Excess amino acids are typically converted to glucose through gluconeogenesis or stored as fat.
Correct Answer:
B
— Converted to glucose
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Q. What is the primary function of branched-chain amino acids (BCAAs)?
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A.
Energy production
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B.
Protein synthesis
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C.
Hormone regulation
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D.
Neurotransmitter synthesis
Solution
Branched-chain amino acids (leucine, isoleucine, and valine) primarily promote protein synthesis and muscle recovery.
Correct Answer:
B
— Protein synthesis
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Q. What is the primary site of amino acid metabolism in the body?
-
A.
Liver
-
B.
Kidney
-
C.
Muscle
-
D.
Intestine
Solution
The liver is the primary site for amino acid metabolism, where transamination and deamination occur.
Correct Answer:
A
— Liver
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Q. What is the role of glutamine in the body?
-
A.
Energy source
-
B.
Nitrogen transport
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C.
Hormone production
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D.
Antioxidant
Solution
Glutamine serves as a major nitrogen transporter in the body, playing a key role in nitrogen metabolism.
Correct Answer:
B
— Nitrogen transport
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Q. Which amino acid is a precursor for the neurotransmitter serotonin?
-
A.
Tyrosine
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B.
Tryptophan
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C.
Phenylalanine
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D.
Glutamate
Solution
Tryptophan is the amino acid precursor for serotonin, a key neurotransmitter in mood regulation.
Correct Answer:
B
— Tryptophan
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Q. Which amino acid is a precursor for the synthesis of catecholamines?
-
A.
Tyrosine
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B.
Glutamine
-
C.
Glycine
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D.
Asparagine
Solution
Tyrosine is the precursor for catecholamines such as dopamine, norepinephrine, and epinephrine.
Correct Answer:
A
— Tyrosine
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Q. Which amino acid is considered essential and must be obtained from the diet?
-
A.
Alanine
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B.
Glutamine
-
C.
Lysine
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D.
Serine
Solution
Lysine is an essential amino acid that cannot be synthesized by the body and must be obtained through diet.
Correct Answer:
C
— Lysine
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Q. Which amino acid is involved in the urea cycle?
-
A.
Arginine
-
B.
Cysteine
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C.
Methionine
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D.
Histidine
Solution
Arginine plays a crucial role in the urea cycle, which detoxifies ammonia by converting it to urea.
Correct Answer:
A
— Arginine
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Q. Which amino acid is known for its role in collagen synthesis?
-
A.
Proline
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B.
Arginine
-
C.
Cysteine
-
D.
Serine
Solution
Proline is a key amino acid involved in the synthesis of collagen, an important structural protein in connective tissues.
Correct Answer:
A
— Proline
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Q. Which process involves the removal of an amino group from an amino acid?
-
A.
Transamination
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B.
Deamination
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C.
Decarboxylation
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D.
Condensation
Solution
Deamination is the process of removing an amino group from an amino acid, resulting in the formation of ammonia.
Correct Answer:
B
— Deamination
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