Medical School
MCAT practice Practice for the AAMC MCAT with science, psychology, and critical reasoning questions.
13 original sample questions with answers and explanations. This is a short practice set, not a full exam or an official past paper.
1. Which amino acid has a nonpolar, hydrophobic side chain and is commonly found in the interior of globular proteins? Leucine Glutamic acid Lysine Serine
2. A buffer solution resists changes in pH. According to the Henderson-Hasselbalch equation, when the concentration of weak acid equals the concentration of conjugate base, the pH equals: Zero Twice the pKa 14 minus the pKa The pKa of the acid
3. In operant conditioning, a behavior increases when it is followed by the removal of an unpleasant stimulus. This process is called: Positive reinforcement Negative reinforcement Positive punishment Negative punishment
4. A ball is dropped from a height h. Ignoring air resistance, what is its velocity just before hitting the ground? v = √(gh) v = 2gh v = √(2gh) v = gh²
5. The enzyme hexokinase catalyzes the phosphorylation of glucose to glucose-6-phosphate. This reaction is an example of: Group transfer Hydrolysis Oxidation-reduction Isomerization
6. A patient has a mutation affecting the motor neurons in the spinal cord. Which function would most likely be impaired? Perception of pain Voluntary muscle movement Regulation of heart rate Hearing
7. According to sociological theories, the process by which individuals learn the norms and values of their culture is called: Assimilation Stratification Institutionalization Socialization
8. Which organelle is primarily responsible for ATP production through oxidative phosphorylation? Ribosome Golgi apparatus Mitochondrion Lysosome
9. A solution has a hydrogen ion concentration of 10⁻⁹ M. What is the pH of this solution? 5 9 7 14
10. Piaget's concrete operational stage is characterized by the development of: Logical thinking about concrete events Object permanence Abstract reasoning Egocentrism
11. Which structure in the kidney is primarily responsible for filtering blood? Loop of Henle Collecting duct Glomerulus Distal tubule
12. A researcher observes that participants who are offered a reward for completing a task show less interest in the task afterward. This phenomenon is called: Classical conditioning Learned helplessness Cognitive dissonance The overjustification effect
13. In glycolysis, glucose is converted to pyruvate. What is the net yield of ATP per glucose molecule in glycolysis alone? 1 ATP 4 ATP 2 ATP 36 ATP
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