Biochemistry - MCQ Practice Questions

The branching enzyme in glycogen synthesis catalyzes which type of reaction?

During high-intensity exercise, which carbohydrate provides immediate energy despite low concentration in blood?

Which of the following is NOT a function of glycogen in liver?

A newborn presents with hepatomegaly, lactic acidosis, and hypoglycemia. Enzyme analysis shows deficiency of glucose-6-phosphatase. Which disease is this?

In hereditary fructose intolerance (HFI), which enzyme deficiency causes accumulation of fructose-1-phosphate?

In the pentose phosphate pathway, the oxidative phase generates NADPH. Which metabolic process primarily utilizes this NADPH in fed state?

The Haworth projection of glucose differs from its Fischer projection. Which structural feature is best represented in Haworth projection?

During fasting, which hormonal change directly increases hepatic glycogenolysis?

Which adaptation occurs in liver during prolonged fasting to maintain blood glucose?

A 45-year-old patient with Type 2 diabetes mellitus shows elevated fasting blood glucose (180 mg/dL) but normal HbA1c levels initially. Which carbohydrate metabolism pathway is primarily impaired in this patient's liver?