Biochemistry Quiz | Biochemistry Short Questions and Answers

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Questions
41 Which of the following has a known association with phenylketonuria?
A Presentation in the second year of life with absence seizures.
B The association of red hair and brown eyes.
C Normal development.
D Musty odour.

Answer: Musty odour.
42 Which of the following is a characteristic feature of familial hypercholesterolaemia?
A Autosomal dominant inheritance
B elevated chylomicrons
C hypertriglyceridaemia
D increased expression of LDL receptors

Answer: Autosomal dominant inheritance
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43 An 16-year-old man presents with polyuria and polydipsia. Which of the following may confirm the diagnosis of diabetes mellitus?
A A random plasma glucose of >7.5 mmol/L
B A finding of 3+ ketonuria
C An HbA1c of 7.0%
D A fasting plasma glucose of 7.5 mmol/L

Answer: A fasting plasma glucose of 7.5 mmol/L
44 Which of the following enzyme defects is associated with a characteristic body odour?
A Phenylalanine aminotransferase
B Galactose0-phosphate-uridyltransferase
C Ornithine transcarbamylase deficiency
D Branched chain ketoacid decarboxylase

Answer: Branched chain ketoacid decarboxylase
45 Which of the following conditions may be detectable by growth monitoring?
A Hyperthyroidism
B Hypothyroidism
C Pseudohypoparathyroidism
D XYY Syndrome

Answer: Hypothyroidism
46 With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT:
A Arterial walls contain cells with LDL receptors.
B Cholesterol is required for the formation of red blood cell membranes.
C Chylomicrons are synthesized in the liver.
D HDL is assembled in the extracellular space.

Answer: Chylomicrons are synthesized in the liver.

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