NLN PAX Exam Science (2026) – 320 Questions on Biology, Chemistry, Physics & Human Anatomy

This document contains approximately 320 expert-verified exam questions and answers for the NLN PAX Science 2026 examination. It provides comprehensive coverage of core science domains tested on the NLN PAX, including chemistry fundamentals (Law of Conservation of Mass, Law of Conservation of Energy, significant figures, scientific notation, atomic number, isotopes, molarity formula, empirical formula, oxidation, ionic and covalent bonding, endothermic vs exothermic reactions), physics principles (Newton’s Laws of Motion, Ohm’s Law, Archimedes’ Principle, kinetic and potential energy, friction, four fundamental forces, convection, thermal radiation), and general physical science concepts such as states of matter, phase changes, precision vs accuracy, and error analysis. Biological sciences are thoroughly addressed, including cell structure (prokaryotic vs eukaryotic), mitosis and meiosis stages (prophase, metaphase, anaphase, telophase, interphase), genetics (genotype, phenotype, homozygous vs heterozygous, Down syndrome—Chromosome 21), microbiology (bacteria, archaea, algae, protozoa, fungi), organ systems (11 total), endocrine and immune systems, nephron function, osmosis and diffusion, and cardiovascular circulation (oxygenated vs deoxygenated blood flow, chambers of the heart, systolic and diastolic pressure). Additional high-yield topics include joints (hinge, pivot, ball-and-socket, saddle), tissues (epithelial, connective, muscle, nervous), ecological principles (population, community, carrying capacity), and core chemistry elements such as magnesium in chlorophyll and nitrogen in light bulbs. The question-and-answer format mirrors the structure and difficulty of the NLN PAX Science section, reinforcing rapid recall, conceptual clarity, and cross-disciplinary integration required for competitive nursing school admission. This resource is especially relevant for: Pre-nursing students preparing for the NLN PAX Applicants to ADN and BSN nursing programs Students reviewing prerequisite biology, chemistry, and physics Allied health program applicants Test-takers seeking comprehensive science review Keywords: NLN PAX science 2026, NLN PAX exam questions, nursing entrance exam science, law of conservation of mass and energy, significant figures scientific notation, Newton laws of motion, Ohm law V equals IR, atomic structure protons neutrons electrons, mitosis and meiosis stages, genotype phenotype genetics, Down syndrome chromosome 21, osmosis and diffusion, endocrine and immune system, nephron kidney function, arteries and veins circulation, systolic diastolic pressure, ionic and covalent bonds, oxidation loss of electrons, states of matter phase changes, bacteria archaea protozoa fungi algae, Archimedes principle buoyancy, molarity formula chemistry