221. At what temperature blood is stored______________?
A. -4°C
B. 4°C
C. 6°C
D. 8°C

222. Which of the following represents most dangerous situation_____________?
A. Rh+ ve mother, who is bearing 2nd Rh+ ve child
B. Rh+ ve mother, bearing her 2nd + ve child
C. Rh+ ve mother, bearing her 1st Rh – ve child
D. Rh – ve mover, bearing her 1stRh + ve child

223. Histiocytes are_____________?
A. Scavenger cells
B. Allergic cells
C. Released in immunologic response
D. Leukocytes

224. Which of the following agents in not likely to be found in plasma ?
A. Thrombin
B. Fibrinogen
C. Prothrombin
D. Calcium ion

225. 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

226. Life cycle of RBC is_______________?
A. 12 days
B. 90 days
C. 120 days
D. One month

227. IN acute infection which of the following is found_______________?
A. Leucopenia
B. Leukocytosis
C. Neutrophilia
D. Neutropenia

228. T- lymphocytes function to______________?
A. Antibody production
B. Complement activation
C. Lymphokine production and delayed hypersensitivity
D. Immediate hypersensitivity

229. The anticoagulant of choice used in the blood bank is_______________?
A. Calcium oxalate
B. Heparin solution
C. Acid citrate dextrose solution
D. Sodium fluoride

230. Normal myeloid / erythroid ratio is______________?
A. 1:1000
B. 1:5000
C. 1:100
D. 1:50