A. complete antigen molecule
B. Hapten
C. Immunogen
D. Smallest antigenic determinant
✅ The correct answer is option Smallest antigenic determinant.
Medical
Seroconversion in HIV infection takes place in______________?
A. 2 weeks
B. 4 weeks
C. 9 weeks
D. 12 weeks
✅ The correct answer is option 4 weeks.
Which of the following characteristics of bacteria is not true?
A. Unicellular
B. Free living
C. Having either DNA or RNA
D. Cell wall containing muramic acid
✅ The correct answer is option Having either DNA or RNA.
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.
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.
In small intestine, cholera toxin acts by______________?
A. ADP – ribosylation of the G regulatory protein
B. Inhibition of adenyl cyclase
C. Activation of GTPase
D. Active absorption of NaCI
✅ The correct answer is option ADP – ribosylation of the G regulatory protein.
Steam under pressure in used in ________ sterilization?
A. Pasteurization
B. Autoclave
C. Kochs sterilizer
D. hot air oven
✅ The correct answer is option Autoclave.
Antigen used in Weil-Felix reaction______________?
A. E.coli
B. Haemophilus
C. Proteus
D. Staphylococcus
✅ The correct answer is option Proteus.
Which is not true about vibrio cholera_________________?
A. It is non-halophilic
B. Grows on simple media
C. Man is the only natural host
D. Cannot survive in extracellular environment
✅ The correct answer is option Cannot survive in extracellular environment.
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.