NLN PAX Science Exam (2026) – 150 Questions on Biology, Chemistry, Physics & Human Physiology

This document contains approximately 150 exam-style multiple-choice questions with 100% correct verified answers for the NLN PAX Science Exam 2026. It comprehensively reviews high-yield topics across biology, chemistry, physics, and human anatomy and physiology, closely aligned with nursing entrance exam standards. The content includes cellular processes (diffusion, osmosis, mitosis differences in plants vs mammals, cell plates), genetics and population biology (Hardy-Weinberg equilibrium, entropy, enzyme optimal temperature in Kelvin), microbiology (blue-green algae nitrogen fixation), and organ systems (kidney function, medulla role in breathing, cerebral cortex in memory). The document also covers chemistry fundamentals such as emulsions (mayonnaise), nonpolar covalent bonds (O₂), phase changes (liquid to gas heat absorption), heterogeneous mixtures, carbon dioxide identification via limewater reaction, and unit equivalencies (calories and joules). Physics principles and measurement concepts are integrated alongside applied health science topics including urinalysis findings (glucose and protein presence), smoking-related emphysema, vitamin deficiencies (Vitamin A and night blindness), clotting mechanisms (thromboplastin release from ruptured platelets), and neurological structures (axon function). The structured question-and-answer format mirrors the NLN PAX Science section, reinforcing conceptual understanding, rapid recall, and interdisciplinary application necessary for competitive nursing school admission. This resource is especially relevant for: Pre-nursing students preparing for the NLN PAX ADN and BSN program applicants Allied health entrance exam candidates Students reviewing prerequisite biology, chemistry, and physics Test-takers seeking targeted science practice questions Keywords: NLN PAX science exam 2026, nursing entrance exam science questions, Hardy Weinberg equilibrium, second law of thermodynamics entropy, enzyme optimal temperature Kelvin, diffusion and osmosis biology, nonpolar covalent bond O2, phase change liquid to gas endothermic, heterogeneous mixtures definition, Pap test cervix detection, cerebral cortex memory, medulla breathing control, kidney filtration function, smoking emphysema risk, vitamin A night blindness, nitrogen fixation blue green algae, thromboplastin blood clotting, calorie and joule equivalence, carbon dioxide limewater test, plant cell plates mitosis