MDCAT 2026 MCQs

A noncompetitive inhibitor binds away from the active site.
It lowers the amount or efficiency of functional enzyme.

The cerebrum contains sensory, motor and association areas.
It supports memory, reasoning and voluntary movement.

Lamarck proposed inheritance of acquired characteristics.
Modern genetics does not support this as a general mechanism.

The hypothalamus integrates homeostatic signals.
It controls autonomic and endocrine responses through the pituitary.

Lamarck proposed inheritance of acquired characteristics.
Modern genetics does not support this as a general mechanism.

The hypothalamus integrates homeostatic signals.
It controls autonomic and endocrine responses through the pituitary.

Lamarck proposed inheritance of acquired characteristics.
Modern genetics does not support this as a general mechanism.

A reflex begins with receptor stimulation and sensory input.
Motor output then activates an effector.

Deamination removes nitrogen from amino acids.
The remaining carbon skeleton can enter glycolysis or the Krebs cycle.

Hydrolysis uses a water molecule to break a covalent bond.
The products receive hydrogen and hydroxyl groups.

Myelin electrically insulates the axon.
Impulses jump between nodes of Ranvier by saltatory conduction.

Fats are more reduced than carbohydrates.
Their oxidation supplies more high-energy electrons to respiration.