Biology MDCAT MCQs
Cell biology, genetics & physiology MCQs
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Answer: Amylase breaks down starch into simpler sugars to provide energy during germination.
Answer: Auxin promotes cell elongation, apical dominance, and root development.
Answer: Root hairs increase surface area for water and mineral absorption from the soil.
Answer: The epiglottis covers the glottis during swallowing to prevent food from entering the airway.
Answer: Myopia (nearsightedness) is corrected with concave lenses that diverge light before it enters the eye.
Answer: Estrogen and progesterone are the primary hormones regulating the menstrual cycle.
Answer: The skin is the largest organ, covering about 20 square feet in adults and protecting against pathogens.
Answer: The cerebellum coordinates voluntary movements, balance, and posture.
Answer: Semicircular canals detect rotational movement and help maintain equilibrium.
Answer: Hemoglobin is the iron-containing protein in RBCs that binds and transports oxygen.
Answer: The SA node generates electrical impulses that set the rhythm of the heartbeat.
Answer: Transpiration is the evaporation of water from stomata, creating a pull for water transport.
Answer: Oxygen is released as a byproduct when water molecules are split during the light reactions.
Answer: The electron transport chain produces approximately 34 ATP molecules through oxidative phosphorylation.
Answer: Cartilage is a flexible connective tissue found in joints, ears, and the nose.
Answer: Cardiac muscle is involuntary (not under conscious control) and striated, found only in the heart.
Answer: Hemoglobin is a protein inside RBCs, not a separate component of blood.
Answer: Xylem transports water and dissolved minerals from roots to the rest of the plant.
Answer: Pepsin is secreted by chief cells in the stomach and breaks down proteins in acidic conditions.
Answer: The lymphatic system produces and transports lymphocytes to fight infections.