81. All the bacteria fix nitrogen except
a. Cyanobacterial
b. E. Coli.
c. Azobacter
d. Rhizobium
82. The principal structural component of the cell wall in bacteria is made up of
a. Simple protein
b. Glycoprotein
c. Peptidoglycan polymer
d. Complex polysaccharide
83. Infected blood products may produce serum hepatitis due to the presence of
a. Hepatitis A Virus
b. Hepatitis B Virus
c. Hepatitis C Virus
d. Bacteriophage
84. The microorganisms that can enter the body only through an injury is
a. Salmonella typhi
b. Clostridium tetani
c. Clostridium botulinum
d. Streptococcus pyrogenes
85. Class 1 MHC antigen are present on
a. All cells of the body
b. Only cells of the immune system
c. Only on leukocyte
d. Only on skin cell
86. The test which is useful for the identification of M. Tuberculosis
a. Haemolysis
b. Fermentation with sugar
c. Gram staining
d. Zeihi-Neelson staining
87. Humoral Immune system mediated by
a. B-Cell of lymphocyte
b. T-Cell of lymphocyte
c. A-Cell of lymphocyte
d. D-Cell of lymphocyte
88. The direct ELISA test requires
a. Known Antibody
b. Known Antigen
c. Patient Antibody
d. Substrate
89. Antibiotic therapy can cure which of the following forms of syphilis?
a. Congenital syphilis
b. Secondary syphilis
c. Primary syphilis
d. Tertiary syphilis
90. The single most important laboratory test for determining the virulence of
staphylococci
a. Mannitol fermentation
b. The catalase test
c. Detection of coagulase
d. Detection fo penicillinase
