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Format of the DAT

Learn more about the subject areas tested on the DAT

Shahed avatar
Written by Shahed
Updated over 9 months ago

The Dental Admissions Test (DAT) a 4.5-hour exam that is composed of FOUR sections, as shown below:

1. Survey of the Natural Sciences (100 Items) which includes 40 Biology, 30 Chemistry, and 30 Organic Chemistry questions. You are given 90 minutes to complete all 100 questions. 

a. Biology (40 items)

  • Cell and Molecular Biology: origin of life, cell metabolism (including photosynthesis/enzymology), cellular processes, thermodynamics, organelle structure and function, mitosis/meiosis, cell structure, experimental cell biology, biomolecules, and integrated relationships

  • Diversity of Life: Biological Organization and Relationship of Major Taxa (Six-Kingdom, Three-Domain System) – plantae, animalia, protista, fungi, eubacteria (bacteria), archaea, and integrated relationships

  • Structure and Function of Systems: integumentary, skeletal, muscular, circulatory, immunological, digestive, respiratory, urinary, nervous/senses, endocrine, reproductive, and integrated relationships

  • Developmental Biology: fertilization, descriptive embryology, developmental mechanisms, and integrated relationships

  • Genetics: molecular genetics, human genetics, classical genetics, chromosomal genetics, and genetic technology, and integrated relationships

  • Evolution, Ecology, and Behavior: natural selection, population genetics/speciation, population and community ecology, ecosystems, and animal behavior (including social behavior), and integrated relationships

b. General Chemistry (30 items)

  • Stoichiometry and General Concepts: percent composition, empirical formulae, balancing equations, moles and molecular formulas, molar mass, density, and calculations from balanced equations

  • Gases: kinetic molecular theory of gases, Dalton’s, Boyle’s, Charles’s, and ideal gas law

  • Liquids and Solids: intermolecular forces, phase changes, vapor pressure, structures, polarity, and properties

  • Solutions: polarity, properties (colligative, non-colligative), forces, and concentration calculations

  • Acids and Bases: pH, strength, Brønsted-Lowry reactions, and calculations

  • Chemical Equilibria: molecular, acid/base, precipitation, calculations, and Le Chatelier’s principle

  • Thermodynamics and Thermochemistry: laws of thermodynamics, Hess’s law, spontaneity, enthalpies and entropies, and heat transfer

  • Chemical Kinetics: rate laws, activation energy, and half-life

  • Oxidation-Reduction Reactions: balancing equations, determination of oxidation numbers, electrochemical calculations, and electrochemical concepts and terminology

  • Atomic and Molecular Structure: electron con guration, orbital types, Lewis-Dot diagrams, atomic theory, quantum theory, molecular geometry, bond types, and sub-atomic particles

  • Periodic Properties: representative elements, transition elements, periodic trends, and descriptive chemistry

  • Nuclear Reactions: balancing equations, binding energy, decay processes, particles, and terminology

  • Laboratory: basic techniques, equipment, error analysis, safety, and data analysis Organic Chemistry (30 items)

c. Organic Chemistry (30 items)

  • Mechanisms: Energetics and Structure - elimination, addition, free radical, substitution mechanisms, and other mechanisms and reactions

  • Chemical and Physical Properties of Molecules: Spectroscopy (1H NMR, 13C NMR, infrared, and multi-spectra), structure (polarity, intermolecular forces (solubility, melting/ boiling point, etc.), and laboratory theory and techniques (TLC, separations, etc.)

  • Stereochemistry (structure evaluation): Chirality, isomer relationships, and conformations

  • Nomenclature: IUPAC rules and functional groups in molecules

  • Individual Reactions of the Major Functional Groups and Combinations of Reactions to Synthesize Compounds: Alkene/alkyne, aromatic, substitution/elimination, aldehyde/ketone, carboxylic acids and derivatives, and other. For each area listed above, the following sub-areas apply: general, one-step, and multi-step

  • Acid Base Chemistry: Ranking acidity/basicity (structure analysis and pH/pKa data analysis), and prediction of products and equilibria

  • Aromatics and Bonding: Concept of aromaticity, resonance, atomic/molecular orbitals, hybridization, and bond angles/lengths 

2. Perceptual Ability (90 Items) - The Perceptual Ability Test is comprised of six subtests, as listed below. You are given 60 minutes to complete all 90 questions. 

  1. Keyholes (apertures)

  2. Top-Front-End (view recognition)

  3. Angle-Ranking (angle discrimination)

  4. Hole Punching

  5. Cube Counting

  6. Pattern Folding (3D form development)

3. Reading Comprehension (50 items) - The Reading Comprehension Test contains three reading passages on various scientific topics. Prior understanding of the science topics is not a prerequisite to answering the test items. The reading passages require the ability to read, comprehend, and thoroughly analyze basic scientific information. You are given 60 minutes to read the three passages and complete all 50 questions. 

4. Quantitative Reasoning (40 items) - Mathematical Problems including algebra (equations and expressions, inequalities, exponential notation, absolute value, ratios and proportions, and graphical analysis); Data Analysis, Interpretation, and Sufficiency; Quantitative Comparison; and Probability and Statistics. There are also some applied Mathematics (Word) Problems. You are given 45 minutes to complete all 40 questions. Note: a basic four-function calculator is available on the computer screen during this section. 

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