BIOCHEM EXAM 4( FINAL)
questions and answers already
graded A+(GUARANTEED
SUCCESS)
1. Deamination of most amino acids in the liver is accompanied by the
conversion of:
A) pyruvate into alanine.
B) glutamate into glutamine.
C) alpha-ketoglutarate into glutamate.
D) nitrogen into urea.
E) oxaloacetate into aspartate. - answer C) alpha-ketoglutarate into
glutamate.
2. Which cofactor is typically required in transamination reactions?
A) pyridoxal-phosphate
B) coenzyme Q
C) biotin
D) thiamin pyrophosphate
E) nicotinamide adenine dinucleotide - answer A) pyridoxal-phosphate
3. Which amino acid can be considered to be both glucogenic and
ketogenic?
A) threonine
B) aspartate
C) leucine
D) isoleucine
E) both threonine and isoleucine - answer E) both threonine and
isoleucine
,4. In which pair of compounds is the second molecule produced by the
deamination of the first molecule?
A) aspartic acid and oxaloacetate
B) glutamine and glutamate
C) alanine and pyruvate
D) All of the answers are correct.
E) None of the answers is correct. - answer D) All of the answers are
correct.
5. Nitrogen from protein is eliminated as what compound in animals?
A) ammonia
B) urea
C) pyrimidine
D) both ammonia and urea
E) both urea and pyrimidine - answer D) both ammonia and urea
6. Which statement is FALSE for uric acid?
A) This compound is produced in humans as a result of high-protein diets.
B) This compound is the major means of nitrogen elimination in birds.
C) This compound is a purine base.
D) This compound is a product of both protein and nucleic acid
catabolism.
E) None of the statements is false. - answer E) None of the statements is
false.
7. Which amino acid is used to transport nitrogen to the liver?
A) alanine
B) asparagine
C) glutamine
D) glutamate
E) both alanine and glutamine - answer E) both alanine and glutamine
, 8. Phenylketoneuria is associated with disorders in the catabolism of
which amino acid?
A) phenylalanine
B) tyrosine
C) tryptophan
D) histidine - answer A) phenylalanine
9. Which compound is NOT transported across the inner mitochondrial
membrane as part of either the urea cycle and aspartate-arginosuccinate
shunt?
A) fumarate
B) aspartate
C) ornithine
D) citrulline
E) neither fumarate nor citrulline - answer A) fumarate
10. Serotonin is produced from the metabolism of which amino acid?
A) valine
B) serine
C) cysteine
D) tyrosine
E) tryptophan - answer E) tryptophan
11. Which compound can be described as glucogenic?
A) leucine
B) isoleucine
C) lysine
D) All of the answers are correct.
E) None of the answers is correct. - answer B) isoleucine
questions and answers already
graded A+(GUARANTEED
SUCCESS)
1. Deamination of most amino acids in the liver is accompanied by the
conversion of:
A) pyruvate into alanine.
B) glutamate into glutamine.
C) alpha-ketoglutarate into glutamate.
D) nitrogen into urea.
E) oxaloacetate into aspartate. - answer C) alpha-ketoglutarate into
glutamate.
2. Which cofactor is typically required in transamination reactions?
A) pyridoxal-phosphate
B) coenzyme Q
C) biotin
D) thiamin pyrophosphate
E) nicotinamide adenine dinucleotide - answer A) pyridoxal-phosphate
3. Which amino acid can be considered to be both glucogenic and
ketogenic?
A) threonine
B) aspartate
C) leucine
D) isoleucine
E) both threonine and isoleucine - answer E) both threonine and
isoleucine
,4. In which pair of compounds is the second molecule produced by the
deamination of the first molecule?
A) aspartic acid and oxaloacetate
B) glutamine and glutamate
C) alanine and pyruvate
D) All of the answers are correct.
E) None of the answers is correct. - answer D) All of the answers are
correct.
5. Nitrogen from protein is eliminated as what compound in animals?
A) ammonia
B) urea
C) pyrimidine
D) both ammonia and urea
E) both urea and pyrimidine - answer D) both ammonia and urea
6. Which statement is FALSE for uric acid?
A) This compound is produced in humans as a result of high-protein diets.
B) This compound is the major means of nitrogen elimination in birds.
C) This compound is a purine base.
D) This compound is a product of both protein and nucleic acid
catabolism.
E) None of the statements is false. - answer E) None of the statements is
false.
7. Which amino acid is used to transport nitrogen to the liver?
A) alanine
B) asparagine
C) glutamine
D) glutamate
E) both alanine and glutamine - answer E) both alanine and glutamine
, 8. Phenylketoneuria is associated with disorders in the catabolism of
which amino acid?
A) phenylalanine
B) tyrosine
C) tryptophan
D) histidine - answer A) phenylalanine
9. Which compound is NOT transported across the inner mitochondrial
membrane as part of either the urea cycle and aspartate-arginosuccinate
shunt?
A) fumarate
B) aspartate
C) ornithine
D) citrulline
E) neither fumarate nor citrulline - answer A) fumarate
10. Serotonin is produced from the metabolism of which amino acid?
A) valine
B) serine
C) cysteine
D) tyrosine
E) tryptophan - answer E) tryptophan
11. Which compound can be described as glucogenic?
A) leucine
B) isoleucine
C) lysine
D) All of the answers are correct.
E) None of the answers is correct. - answer B) isoleucine
