Quiz on Carbohydrate Metabolism

What is the primary source of glucose for energy metabolism?

• Fermentation

• Cellular respiration

• Photosynthesis

• Diet

Which process synthesizes glucose from non-carbohydrate precursors?

• Glycogenesis

• Glycolysis

• Fermentation

• Gluconeogenesis

What is the main function of gluconeogenesis?

• To maintain blood glucose levels

• To store excess glucose

• To break down glycogen

• To produce ATP

Which enzyme is involved in the conversion of pyruvate to oxaloacetate?

• Glycogen phosphorylase

• Pyruvate carboxylase

• Lactate dehydrogenase

• Phosphofructokinase

What is the role of phosphoenolpyruvate carboxykinase?

• To convert oxaloacetate to phosphoenolpyruvate

• To convert glucose to glucose-6-phosphate

• To degrade glucose

• To synthesize glycogen

Which amino acids can enter gluconeogenesis?

• Essential amino acids

• Glucogenic amino acids

• Ketogenic amino acids

• Non-essential amino acids

What is the main regulatory enzyme in glycolysis?

• Fructose 1,6-bisphosphatase

• Glycogen synthase

• Pyruvate kinase

• Phosphofructokinase

What is the primary function of glycogen synthase?

• To break down glycogen

• To convert glucose to pyruvate

• To form α(1→4) linkages in glycogen

• To synthesize glucose

Which hormone primarily stimulates glycogenolysis?

• Cortisol

• Epinephrine

• Glucagon

• Insulin

What is the end product of glycogenolysis?

• Fructose 1,6-bisphosphate

• Glucose 1-phosphate

• Acetyl CoA

• Lactate