Carbohydrate Metabolism — MCQs

Which of the following is a fructosan?

Which among the following enzymes is an allosteric inhibitor of the TCA cycle?

A 3-year-old girl presents with a history of fussy eating since weaning, particularly when fruit is part of her diet. She becomes cranky, sweats, and displays dizziness and lethargy after consuming meals containing fruit. Her mother has observed that these symptoms resolve when fruit is excluded from her diet. What is the most likely underlying cause of the problems the girl exhibits when eating fruit?

What is the first step in the liver's metabolism of fructose?

The hexose monophosphate shunt occurs in all of the following except?

Which metabolic pathway can utilize propionic acid?

Two sisters are diagnosed with hemolytic anemia. Their older brother was previously diagnosed with the same disorder. Two other brothers are asymptomatic. The mother and father are second cousins. Deficiency of which of the following enzymes would be most likely to cause this disorder?

What is the rate-limiting step of glycogenolysis?

A newborn presents with severe acidosis, vomiting, hypotonia, and neurologic deficits. Serum analysis reveals elevated levels of lactate and alanine. These observations suggest a deficiency in which of the following enzymes?

In the citric acid cycle, the reaction which produces succinyl CoA also forms carbon dioxide. Which enzymic step is key to this process?