361. Half-life of free HIV in plasma is________________?
A. 24 hours
B. 6 hours
C. 12 hours
D. 3 months
✅ The correct answer is option 6 hours.
Microbiology MCQs
362. Function of Ig A is________________?
A. Acts as a mucosal barrier for infection
B. Circulating antibody
C. Kills virus infected cells
D. Activates macrophages
✅ The correct answer is option Acts as a mucosal barrier for infection.
363. A mother donated a kidney to her daughter having chronic renal failure, which kind of graft it represents________________?
A. Allo
B. ISO
C. Xeno
D. Auto
✅ The correct answer is option Allo.
364. cAMP reaction is shown by which streptococci ?
A. Group A
B. Group B
C. Group C
D. Group D
✅ The correct answer is option Group B.
365. Steam under pressure in used in ________ sterilization?
A. Pasteurization
B. Autoclave
C. Kochs sterilizer
D. hot air oven
✅ The correct answer is option Autoclave.
366. Sterilisation control for moist heat is “or” The efficacy of the moist heat sterilization technique commonly used to sterlilize laboratory ware and culture media is tested by using_______________?
A. using Bacillus stearo thermo philus
B. Using non-pathogenic strain of clostridium tetani
C. Using chemical indicator
D. Using methylene blue
✅ The correct answer is option using Bacillus stearo thermo philus.
367. Megaloblastic anaemia is caused by_________________?
A. Dog tapeworm
B. Hookworm
C. Fish tapeworm
D. Threadworm
✅ The correct answer is option Fish tapeworm.
368. The virus which causes Aplastic anemia in chronic hemolytic disease is_______________?
A. Adeno
B. Hepatitis
C. EB virus
D. Parvo virus
✅ The correct answer is option Parvo virus.
369. In patients with asthma due to an allergic cause the serum levels of which immunoglobulin increase____________________?
A. IgD
B. IgM
C. IgA
D. IgE
✅ The correct answer is option IgE.
370. Secretory piece of IgA is synthesized in______________?
A. T-cells
B. B-cells
C. Lymph nodes
D. Mucosal epithelium
✅ The correct answer is option Mucosal epithelium.