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ATDH Cheat Sheet 2026

The 30 highest-yield ATDH facts, distilled from real exam questions. Print it, save it as a PDF, or study it here β€” free, no sign-up.

240 questions
230 min time limit
50% to pass
  1. A disaccharide is a carbohydrate composed of how many monosaccharide units? β†’ Two
  2. In the fluid mosaic model of the cell membrane, what is the primary function of integral proteins? β†’ To transport molecules across the membrane and act as receptors.
  3. The area of a circle with radius 6 cm is approximately: (Use Ο€ β‰ˆ 3.14) β†’ 113.04 cmΒ²
  4. Which statement about aromatic compounds is FALSE? β†’ They readily undergo addition reactions
  5. Solve the following equation for x: (2x + 5) / 3 = 3x - 5 β†’ x = 20/7
  6. Two lines that never intersect and are always the same distance apart are called: β†’ Parallel lines
  7. A triangle has a base of 12 m and a height of 7 m. What is its area? β†’ 42 mΒ²
  8. According to Markovnikov's rule, when HBr adds to an unsymmetrical alkene, where does the bromine atom attach? β†’ To the carbon bearing the fewest hydrogen atoms (more substituted carbon)
  9. The term 'distal' in anatomical directional terminology means: β†’ Farther from the point of attachment or origin
  10. Which of the following compounds is an ester? β†’ CH3COOCH3
  11. Which organelle is responsible for cellular respiration? β†’ Mitochondrion
  12. Which type of reaction joins amino acids together to form proteins? β†’ Condensation (peptide bond formation)
  13. What is the perimeter of a square with a side length of 9 inches? β†’ 36 inches
  14. Which blood vessel carries oxygenated blood away from the heart to the body? β†’ Aorta
  15. What are the products when a carboxylic acid reacts with an alcohol in the presence of an acid catalyst? β†’ An ester and water
  16. Which hormone is secreted by the pancreatic beta cells to lower blood glucose levels? β†’ Insulin
  17. What is the circumference of a circle with a diameter of 10 cm? (Use Ο€ β‰ˆ 3.14) β†’ 31.4 cm
  18. In the geometric shape below, four interior angles are indicated. Which of the labeled angles is the smallest? β†’ Angle B
  19. The Pythagorean theorem states that for a right triangle with legs a and b and hypotenuse c: β†’ aΒ² + bΒ² = cΒ²
  20. The primary function of red blood cells (erythrocytes) is to: β†’ Transport oxygen
  21. Which of the following is a noble gas? β†’ Helium
  22. The fundamental principle that requires the number of atoms of each element to be identical on both sides of a chemical equation is known as: β†’ The Law of Conservation of Mass
  23. Which condition is characterized by a symbiotic association between two species, without harm to either, but with some benefit to both symbionts? β†’ Mutualism
  24. Which might have an RNA genome? β†’ Viruses
  25. The central nervous system (CNS) consists of: β†’ Brain and spinal cord
  26. Peristalsis is a function of which body system? β†’ Digestive system
  27. I know the funny story about my sister is true because she told me themselves. How should the word β€œthemselves” be changed? β†’ herself
  28. A negative feedback mechanism is best described as: β†’ A process that returns the body to homeostasis by opposing a change
  29. What is the area of a rectangle with length 8 cm and width 5 cm? β†’ 40 cmΒ²
  30. Which of the following sentences contains a punctuation error? β†’ After sterilizing the instruments the hygienist prepared the treatment room.
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