Medical Mcqs

For heparin which of the following is ?
  • (A)  Inhibits conversion of fibrinogen to insoluble fibrin
  • (B)  Interferes with action of thrombin
  • (C)  Is released by macrophages
  • (D)  Is released by mast cells
T- lymphocytes function to______________?
  • (A)  Antibody production
  • (B)  Complement activation
  • (C)  Lymphokine production and delayed hypersensitivity
  • (D)  Immediate hypersensitivity
Hemoglobin has______________?
  • (A)  Four polypeptide chains, 2α, 1β,1Υ chain
  • (B)  Four heme molecules and four polypeptide chains
  • (C)  Four heme molecules, 2α and 2β chains
  • (D)  One heme and one globin molecule