Biochemistry Practice Quiz

Which of the following best describes the carbohydrate classification of lactose?

• Monosaccharide

• Disaccharide

• Polysaccharide

• Oligosaccharide

Which of the following foods is the best example of a complex polysaccharide?

• White sugar

• Honey

• Starch

• Galactose

Which of the following carbohydrate classifications includes dietary fiber?

• Soluble polysaccharides like pectin

• Disaccharides like sucrose

• Monosaccharides like glucose

• Oligosaccharides like raffinose

Which of the following best explains why glucose is preferred as the primary energy source?

• It is stored in muscles only

• It directly enters glycolysis for ATP production

• It is not absorbed in the intestine

• It cannot cross the cell membrane

A nurse screens a patient for diabetes. The fasting blood glucose level is 160 mg/dL. Which of the following best classifies this result?

• Normal

• Impaired fasting glucose

• Diabetes mellitus

• Hypoglycemia

A patient becomes sweaty and shaky after skipping breakfast. A glucometer reading shows 45 mg/dL. Which of the following best describes this clinical finding?

• Hypoglycemia

• Normal fasting glucose

• Impaired glucose tolerance

• Hyperglycemia

Which of the following is the end product of aerobic glycolysis?

• Pyruvate

• Lactate

• Acetyl-CoA

• Citrate

A premature infant has low enzyme activity in glycolysis, leading to hemolytic anemia. Which of the following glycolytic enzymes is commonly deficient?

• Hexokinase

• Pyruvate kinase

• Phosphofructokinase

• Enolase

A patient with atherosclerosis is advised to reduce dietary cholesterol. Which lipid is most associated with arterial plaque formation?

• High-density lipoprotein (HDL)

• Low-density lipoprotein (LDL)

• Triglycerides

• Phospholipids

Which of the following represents the net ATP yield per glucose molecule in glycolysis?

• 2 ATP

• 4 ATP

• 6 ATP

• 8 ATP