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Questions and Answers
What indicates damage to cells rich in aminotransferases?
What indicates damage to cells rich in aminotransferases?
Which organ primarily features L-amino acid oxidase activity?
Which organ primarily features L-amino acid oxidase activity?
What is the product of the reaction catalyzed by L-amino acid oxidase?
What is the product of the reaction catalyzed by L-amino acid oxidase?
Which enzyme is primarily responsible for the oxidative deamination of L-glutamate?
Which enzyme is primarily responsible for the oxidative deamination of L-glutamate?
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Which enzyme is considered to have low activity and is found only in liver and kidneys?
Which enzyme is considered to have low activity and is found only in liver and kidneys?
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What is NOT a product of L-amino acid oxidase activity?
What is NOT a product of L-amino acid oxidase activity?
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What role does L-glutamate dehydrogenase play in amino acid metabolism?
What role does L-glutamate dehydrogenase play in amino acid metabolism?
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Which of the following is a key characteristic of L-glutamate dehydrogenase?
Which of the following is a key characteristic of L-glutamate dehydrogenase?
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What is the primary role of L-Glutamate dehydrogenase in amino acid metabolism?
What is the primary role of L-Glutamate dehydrogenase in amino acid metabolism?
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Which process is primarily involved in producing free ammonia from amino acids?
Which process is primarily involved in producing free ammonia from amino acids?
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Which of the following amino acids is specifically acted upon by serine dehydratase?
Which of the following amino acids is specifically acted upon by serine dehydratase?
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What is the end product of the glycine cleavage system?
What is the end product of the glycine cleavage system?
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How do reductive deamination processes mainly occur?
How do reductive deamination processes mainly occur?
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Which method specifically converts glutamine into glutamate?
Which method specifically converts glutamine into glutamate?
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In the process of transdeamination, which sequence of reactions occurs?
In the process of transdeamination, which sequence of reactions occurs?
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Which of the following is not involved in the deamination of amino acids?
Which of the following is not involved in the deamination of amino acids?
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What is the primary anabolic pathway for ammonia following deamination of amino acids?
What is the primary anabolic pathway for ammonia following deamination of amino acids?
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Which compound is primarily responsible for the removal of ammonia in the brain?
Which compound is primarily responsible for the removal of ammonia in the brain?
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What percentage of total urinary ammonia is derived from the degradation of glutamine in the kidneys?
What percentage of total urinary ammonia is derived from the degradation of glutamine in the kidneys?
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Which pathway is quantitatively the most important for ammonia disposal in the liver?
Which pathway is quantitatively the most important for ammonia disposal in the liver?
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What is produced by the deamination of glutamine in the liver?
What is produced by the deamination of glutamine in the liver?
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What role do the kidneys play in ammonia excretion?
What role do the kidneys play in ammonia excretion?
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What effect does liver cirrhosis have on ammonia production in the intestines?
What effect does liver cirrhosis have on ammonia production in the intestines?
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Which enzyme synthesizes glutamine from glutamate and ammonia?
Which enzyme synthesizes glutamine from glutamate and ammonia?
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What is the primary role of transamination reactions in amino acid metabolism?
What is the primary role of transamination reactions in amino acid metabolism?
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Which cofactor is essential for the transamination reaction to occur?
Which cofactor is essential for the transamination reaction to occur?
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Which amino acid serves as the major amino group acceptor in transamination reactions?
Which amino acid serves as the major amino group acceptor in transamination reactions?
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Which of the following is NOT a common characteristic of transaminases?
Which of the following is NOT a common characteristic of transaminases?
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Which amino acids are generally excluded from transamination reactions?
Which amino acids are generally excluded from transamination reactions?
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What is a key outcome of the reactions catalyzed by alanine aminotransferase (ALT)?
What is a key outcome of the reactions catalyzed by alanine aminotransferase (ALT)?
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What does the activity of aminotransferases in plasma generally indicate?
What does the activity of aminotransferases in plasma generally indicate?
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Which two aminotransferases are considered the most important and active in transamination reactions?
Which two aminotransferases are considered the most important and active in transamination reactions?
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What compounds are combined to form carbamoyl phosphate in the urea cycle?
What compounds are combined to form carbamoyl phosphate in the urea cycle?
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How many ATP molecules are expended in the formation of carbamoyl phosphate?
How many ATP molecules are expended in the formation of carbamoyl phosphate?
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Which enzyme catalyzes the conversion of aspartate in the urea cycle?
Which enzyme catalyzes the conversion of aspartate in the urea cycle?
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What is the byproduct produced alongside urea in the urea cycle?
What is the byproduct produced alongside urea in the urea cycle?
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Which step in the urea cycle involves the transformation of argininosuccinate?
Which step in the urea cycle involves the transformation of argininosuccinate?
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What is the primary role of the enzyme ornithine transcarbamoylase in the urea cycle?
What is the primary role of the enzyme ornithine transcarbamoylase in the urea cycle?
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Which overall reaction is represented by the urea cycle?
Which overall reaction is represented by the urea cycle?
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Which compound is transported across the mitochondrial membrane by the ornithine-citrulline antiporter?
Which compound is transported across the mitochondrial membrane by the ornithine-citrulline antiporter?
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During the urea cycle, what happens to fumarate?
During the urea cycle, what happens to fumarate?
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What is generated when arginase acts on arginine in the urea cycle?
What is generated when arginase acts on arginine in the urea cycle?
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