291. During the Window period of patient with AIDS_______________?
A. ELISA IS – ve
B. Western Blot is – ve
C. Both are – ve
D. PCR is – ve
✅ The correct answer is option Both are – ve.
Microbiology MCQs
292. Which of the following statement about P24 antigen of HIV is Not True ?
A. It can be detected during the window period
B. Free P24 antigen disappears after the appearance of IgM response to it:
C. Virus load parallel P24 titre
D. It remains during asymptomatic phase
✅ The correct answer is option It remains during asymptomatic phase.
293. Mycobacterium tuberculosis is differentiated from other atypical mycobacteria by______________?
A. Niacin test
B. AFB staining
C. Pas staining
D. None of the above
✅ The correct answer is option Niacin test.
294. The presence of Which of the following factors in viruses makes protective vaccines a possibility ?
A. Enzymes
B. Protein coat
C. Polysaccharide
D. Lipids
✅ The correct answer is option Protein coat.
295. Which of the following belongs to cell fraction derived vaccine______________?
A. Measles
B. Mumps
C. Rubella
D. Hepatitis B
✅ The correct answer is option Hepatitis B.
296. On a stained slide, clostridium tetani has the appearance of a__________________?
A. Bunch of a
B. Chain of beads
C. Drum stick
D. Safely pin
✅ The correct answer is option Drum stick.
297. The culture media used for cultivation of HSV is_____________?
A. Chocolate agar
B. Robertoson’s cooked-meat broth
C. Chorio allantoic membrane
D. Sabourad’s agar
✅ The correct answer is option Chorio allantoic membrane.
298. Which of the following viruses appears to be involved in the pathogenesis of Kaposi’s sarcoma_____________?
A. Human Herpes Virus 3
B. Human Herpes Virus 1
C. Human Herpes Virus 8
D. Human Herpes Virus 4
✅ The correct answer is option Human Herpes Virus 4.
299. Each of the following viruses possesses an outer lipoprotein envelope except_____________?
A. Varicella Zoster Virus
B. Papilloma Virus
C. Influenza Virus
D. Human immunodeficiency virus
✅ The correct answer is option Papilloma Virus.
300. The immediate type of hypersensitivity in which histamine doses not play a major role is______________?
A. Urticaria
B. Asthma
C. Anaphylaxis
D. Arthus reaction
✅ The correct answer is option Arthus reaction.