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2. Individual mononucleotides in a molecule of mRNA are joined together by

  • hydrogen bonds
  • phosphodiester bonds
  • glycosidic bonds
  • peptide bonds

3. A major risk associated with the use of anticoagulants is

  • internal bleeding
  • cardiovascular disease
  • high blood pressure
  • obesity

4. Which of the following shows the reaction catalysed by thromboplastin?

  • prothrombin converted to thrombin
  • thrombin converted to prothrombin
  • fibrinogen converted to fibrin
  • fibrin converted to fibrinogen

5. Thrombin is

  • a soluble plasma protein
  • a clotting factor released by platelets
  • an insoluble protein that forms a mesh to trap red blood cells
  • an enzyme that converts prothrombin into thrombin
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