Radiation Biology Theories Quiz

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Questions and Answers

Which theory suggests that cell damage results when ionising radiation directly hits critical targets within the cell?

  • Cellular Dysfunction theory
  • Direct or Target action theory (correct)
  • Indirect action or Poison Chemical Theory
  • Radiation Absorption theory

What is formed when x-ray photons are absorbed by the water component of a cell according to the text?

  • Toxins
  • Hydrogen peroxide
  • Oxygen radicals
  • Free radicals (correct)

Why do most x-ray photons cause little or no damage to the cell according to the text?

  • They pass through the cell (correct)
  • They cause cellular dysfunction
  • They directly hit DNA
  • They form free radicals

What is the main cause of injury to the irradiated organism based on the text?

<p>Critical damage due to direct hits on DNA (C)</p> Signup and view all the answers

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