MCAT path · Practice
MCAT practice
Most science questions on the MCAT come in sets after a short research passage with data. These are written the same way: a study, a figure or table, then questions that ask you to read the data, judge the design and reason from what you know. Every miss links to the lesson section that teaches it and comes back for review.
Everything here is original and written for this site; none of it comes from the AAMC or any prep company. Each passage passes a format check, two independent AI solvers from different companies who must agree on the answer, and a separate reviewer who checks it against how the real exam is written. For official practice and a real scaled score, use the AAMC's own materials: AAMC MCAT prep · Fee Assistance Program.
Passages
Biological and Biochemical Foundations
- A new inhibitor of a bacterial phosphatase · Proteins and enzymes · 5 questions ✓ done
- Point mutations and the stability of a small protein · Proteins and enzymes, Biomolecule structure · 5 questions ✓ done
- Why fetal hemoglobin holds oxygen more tightly · Proteins and enzymes, Organ systems · 5 questions ✓ done
- Blood fuels and hormones over five days of fasting · Bioenergetics and metabolism · 5 questions ✓ done
- Respiratory control in fresh and stored mitochondria · Bioenergetics and metabolism · 5 questions ✓ done
- Throttling glycolysis: PFK-1 effectors and NAD+ regeneration in muscle · Bioenergetics and metabolism · 5 questions ✓ done
- Three routes into an epithelial cell · Cells and membranes, Proteins and enzymes · 5 questions ✓ done
- Agonists, an antagonist and desensitization at a Gs-coupled receptor · Nervous and endocrine systems, Proteins and enzymes · 5 questions ✓ done
Chemical and Physical Foundations
- Titrating carnosine, a muscle dipeptide · Water, acids and bases, Biomolecule structure · 5 questions ✓ done
- Purifying a bacterial NADH-dependent dehydrogenase · Separation and purification, Proteins and enzymes · 5 questions ✓ done
Topics
- 1A · Proteins and enzymes 26
- 1B · Genetic information 78
- 1C · Heredity and evolution 78
- 1D · Bioenergetics and metabolism 53
- 2A · Cells and membranes 78
- 2C · Cell division and development 153
- 3A · Nervous and endocrine systems 216
- 3B · Organ systems 168
- 5D · Biomolecule structure 12
- 6A · Sensation and perception 90