Biology: Elements in Living Organisms
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Questions and Answers

What are the four elements common to all living organisms?

  • O, C, H, N (correct)
  • O, C, H, S
  • O, C, H, P
  • O, C, H, F

    • What is the atomic mass of an element?

  • Protons - Neutrons
  • Mass of a single atom
  • Protons + Neutrons
  • Mean of mass number because isotopes occur (correct)

    • Why do atoms in a cell not collide with each other?

  • Because their electrons are negatively charged and repel each other (correct)
  • Because they have the same atomic mass
  • Because they have the same number of protons
  • Because they have the same number of neutrons

    • What is the result of a dehydration synthesis reaction?

    <p>The formation of H2O</p> Signup and view all the answers

    What is the periodic table organized by?

    <p>Atomic number</p> Signup and view all the answers

    What are the four major classes of biological macromolecules?

    <p>Carbohydrates, lipids, proteins, nucleic acids</p> Signup and view all the answers

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