Topic 1.2

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  • Created by: emx99
  • Created on: 06-01-16 21:19

1. the three dimensional structure of a protein is held together by

  • peptide, hydrogen and ionic bonds
  • Disulfide bridges and ester bonds
  • Disulfide bonds, hydrogen and ionic bonds
  • hydrogen, ester and ionic bonds
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2. What is hydrolysis?

  • A reaction in which water is made
  • A bond between carbon atoms
  • A reaction in which bonds are broken by the addition of a molecule of water
  • A reaction in which bonds are broken by the removal of a molecule of water

3. What is a saturated fatty acid?

  • One where each carbon atom is joined to the next one in the chain by a triple ionic bond
  • One where each hydrogen atom is joined to the next one in the chain by a single covalent bond
  • One where each carbon atom is joined to the next one in the chain by a single covalent bond
  • One where each carbon atom is joined to the next one in the chain by a double covalent bond

4. A triglyceride is made up of

  • one glycerol molecule, 3 fatty acid molecules joined to it by disulfide bonds
  • one glycerol molecule, 3 fatty acid molecules joined to it by ester bonds
  • one glycerol molecule, 3 fatty acid molecules joined to it by ionic bonds
  • one glycerol molecule, 3 fatty acid molecules joined to it by hydrogen bonds

5. What is the purpose of phospholipids in the cell surface membrane?

  • They let chemicals in and out of the cell
  • They create the membrane by being arranged in a bilayer with hyrophylic phosphate heads and hydrophiboc lipid tails
  • They create the membrane by being arranged in a bilayer with hydrophobic phosphate heads and hydrophilic lipid tails
  • They protect the membrane

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