Protein and Amino Acid Metabolism Quiz
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Which amino acid is essential for the synthesis of proteins, antioxidants, and other sulfur-containing compounds in the body?
A. Arginine
B. Tryptophan
C. Methionine
D. Cysteine
Which amino acid is directly involved in the tricarboxylic acid (TCA) cycle as an intermediate?
A. Leucine
B. Glutamate
C. Aspartate
D. Succinyl-CoA
Which amino acid classification includes cysteine and methionine?
A. Polar amino acids
B. Aromatic amino acids
C. Non-polar amino acids
D. Sulfur-containing amino acids
Which category of proteins is responsible for transporting molecules across cell membranes?
A. Enzymes
B. Structural proteins
C. Transport proteins
D. Storage proteins
What is the main function of the protein classification referred to as antibodies?
A. Defense against pathogens
B. Regulation of gene expression
C. Cellular communication
D. Energy production
What is the primary role of ketogenic amino acids in metabolism?
A. Energy production through gluconeogenesis
B. Formation of ketone bodies for energy
C. Conversion to fatty acids for storage
D. Regulation of neurotransmitter synthesis
What is the primary site of protein absorption in the human digestive system?
A. Stomach
B. Esophagus
C. Small intestine
D. Large intestine
How do heat shock proteins protect cells from damage caused by high temperatures?
A. By promoting protein degradation
B. By preventing protein aggregation
C. By inhibiting DNA replication
D. By increasing cellular respiration
What is the role of citric acid in the tricarboxylic acid (TCA) cycle?
A. Converts glucose to amino acids for storage
B. Converts ammonia to urea for excretion
C. Converts amino acids to glucose for energy
D. Converts acetyl-CoA to energy in the form of ATP
What is the primary function of the group of proteins classified as enzymes?
A. Structural support
B. Cell signaling
C. Metabolic reactions facilitation
D. Energy storage
What is the role of the citric acid cycle in amino acid metabolism?
A. Converts urea to ammonia for absorption
B. Converts glucose to amino acids for storage
C. Converts ammonia to urea for excretion
D. Converts amino acids to keto acids for energy
What is the role of pepsin in the process of protein digestion?
A. Breaks down proteins into amino acids in the stomach
B. Facilitates protein absorption in the small intestine
C. Converts amino acids to glucose for energy
D. Assists in protein synthesis in the liver
Which amino acid is known for its role in muscle protein synthesis and recovery?
A. Arginine
B. Leucine
C. Methionine
D. Tryptophan
Which amino acid classification includes histidine and lysine?
A. Polar amino acids
B. Aromatic amino acids
C. Basic amino acids
D. Non-polar amino acids
What is the role of heat shock proteins in cellular stress response?
A. Regulation of gene expression
B. Energy production
C. Protein folding and stability
D. Cellular communication