Biochemistry Quiz#24 Amino Acid Metabolism and Urea Cycle

1. A newborn screening test reveals elevated levels of phenylalanine. Further testing confirms a diagnosis of phenylketonuria (PKU). Which of the following enzymes is deficient in this patient? 

Question 1 of 5

2. A child presents with sweet-smelling urine and developmental delay. Which of the following conditions is most likely responsible for these symptoms? 

Question 2 of 5

3. A patient complains of joint pain and is observed to have darkening of the urine upon standing. Which enzyme is deficient in this patient's condition? 

Question 3 of 5

4. A patient presents with high levels of ammonia in the blood and a decreased ability to produce urea. Which of the following parts of the urea cycle is most likely affected in this patient? 

Question 4 of 5

5. Which of the following is a common method by which ammonia is transported in the blood from peripheral tissues to the liver for detoxification? 

Question 5 of 5


 

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