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5 Written questions

5 Matching questions

  1. organic molecule
  2. isotopes
  3. pentose
  4. atomic mass
  5. thymine (T)
  1. a type of base in DNA paired with adenine
  2. b atoms of the same element that differ in the number of neutrons
  3. c molecules of life, always contain carbon and hydrogen
  4. d the sum of protons and neutrons in an atom
  5. e 5 carbon sugar

5 Multiple choice questions

  1. substance that cannot be broken down to simpler substances with different properties by ordinary chemical means
  2. a chemical or a combination of chemicals that keeps pH within normal limits
  3. a single chain of amino acids
  4. when two atoms share electrons in such a way that each atom has an octet of electrons in the outer orbital
  5. if the number of carbon atoms in a molecule is low then a carbohydrate is a simple sugar

5 True/False questions

  1. emulsificationsubatomic particle with a negative charge

          

  2. lipidsubstances that release hydrogen ions (H+)^2 when they dissociate in water

          

  3. disaccharideif the number of carbon atoms in a molecule is low then a carbohydrate is a simple sugar

          

  4. monomera simple organic molecule that exists individually or can link with other monomers to form a polymer

          

  5. starchhave a backbone of four fused carbon rings

          

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