Quiz on Biosynthesis and Storage of Carbohydrates

What is the primary function of glycogen in the liver and muscle?

• Energy storage

• Protein synthesis

• Lipid metabolism

• Vitamin absorption

Which enzyme is responsible for converting Glc-6-P into glucose-1-phosphate during glycogenesis?

• Glycogen synthase

• UDP-glucose pyrophosphorylase

• Glycogen phosphorylase

• Phosphoglucomutase

What is the regulatory enzyme for glycogenesis?

• UDP-glucose pyrophosphorylase

• Phosphoglucomutase

• Glycogen phosphorylase

• Glycogen synthase

Which hormone activates glycogenolysis in the liver during the postabsorptive state?

• Insulin

• Cortisol

• Glucagon

• Epinephrine

What is the primary source of carbon skeletons for gluconeogenesis?

• Lactate

• Glucose

• Sucrose

• Fructose

Which hormone opposes the action of glucagon and stimulates gluconeogenesis?

• Epinephrine

• Insulin

• Glucagon

• Cortisol

What is the function of glucagon in the postabsorptive state?

• Activates glycogenolysis

• Promotes glycogenesis

• Inhibits gluconeogenesis

• Stimulates lipolysis

Which hormone induces glycogenolysis under chronic stressful conditions?

• Insulin

• Glucagon

• Cortisol

• Epinephrine

What is the primary function of muscle glycogenolysis?

• Store vitamins

• Synthesize proteins

• Produce ATP

• Replenish blood glucose

Which hormone activates muscle glycogenolysis through the cAMP-dependent β-adrenergic receptor?

• Glucagon

• Epinephrine

• Insulin

• Cortisol