Metabolism & Bioenergetics MCAT Practice Questions
13 board-style MCAT questions in Biological & Biochemical Foundations (B/B). Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- MCAT · hard1. A 25-year-old woman with a positive urine pregnancy test presents with lower abdominal pain and vaginal bleeding at 7 weeks gestation. Pelvic ultrasound reveals an empty intraut…
- MCAT · medium2. A 34-year-old woman presents with progressive muscle weakness, fatigue, and dyspnea on exertion over the past 6 months. Serum lactate is elevated at rest. Muscle biopsy shows ra…
- MCAT · medium3. A biochemistry student measures enzyme activity for phosphofructokinase-1 (PFK-1), a key regulatory enzyme in glycolysis, under varying concentrations of ATP and AMP. The studen…
- MCAT · medium4. A researcher studying cellular respiration observes that a patient's mitochondria have a defect in Complex III of the electron transport chain. This defect prevents proper elect…
- MCAT · medium5. A 3-year-old boy presents with hepatomegaly, failure to thrive, and recurrent hypoglycemic seizures despite frequent feeding. Laboratory studies show severe fasting hyperlactemi…
- MCAT · medium6. A 58-year-old man with newly diagnosed pancreatic adenocarcinoma is enrolled in a clinical trial testing a novel glutaminase inhibitor. Baseline imaging shows a 4 cm tumor with…
- MCAT · medium7. A 34-year-old woman with a history of progressive fatigue and heat intolerance presents to her physician. Laboratory studies reveal elevated resting metabolic rate and thyroid f…
- MCAT · medium8. A clinical biochemist notes that a patient with Type 2 diabetes exhibits elevated basal glucose production despite high blood glucose and insulin levels. Liver biopsy reveals in…
- MCAT · medium9. A 34-year-old woman with type 2 diabetes mellitus presents for routine laboratory evaluation. Her fasting glucose is 156 mg/dL and HbA1c is 8.2%. The biochemistry team explains…
- MCAT · medium10. A cell biologist studying metabolic regulation observes that when a hepatocyte is treated with a compound that directly activates AMP-activated protein kinase (AMPK), fatty acid…
- MCAT · medium11. A 3-year-old boy is brought to the emergency department with altered mental status and severe diaphoresis 30 minutes after consuming apple juice at a family gathering. Vital sig…
- MCAT · medium12. A 24-year-old male sprinter performs a maximal 400-meter sprint. During the first 10 seconds, muscle phosphocreatine is depleted. He continues sprinting for an additional 50 sec…
- MCAT · medium13. A 34-year-old woman presents with progressive fatigue, dyspnea on exertion, and muscle weakness over 3 months. Laboratory studies show normal fasting glucose and lactate levels.…