A. Produced by gram negative bacteria
B. Produced by gram positive bacteria
C. Not secreted outside the cell
D. Cannot be toxoided
✅ The correct answer is option Produced by gram positive bacteria.
Microbiology MCQs
402. Prozone phenomenon is due to______________?
A. Disproportionate antigen antibody levels
B. Excess antigen
C. Excess antibody
D. Hyper immune reaction
✅ The correct answer is option Excess antibody.
403. The major intestinal pathogens which are non-lactose fermenters are_________________?
A. Salmonella
B. Klebsiella
C. Escherichia
D. Paracolons
✅ The correct answer is option Salmonella.
404. Cysticercosis celluosae is caused by_____________?
A. T. Solium
B. Echinococcus granulosus
C. T. Saginata
D. A. nana
✅ The correct answer is option T. Solium.
405. The earliest identifiable cells of T-Cell lineage during maturation are_______________?
A. CD7+ Pro-T-Cells
B. CD5+ Pre-T-Cells
C. CD8+ Pro-T-Cells
D. CD8+ Pre-T-Cells
✅ The correct answer is option CD7+ Pro-T-Cells.
406. The bacterial cell wall has all of the following properties except______________?
A. It consists of a mixed polymer called peptidoglycon
B. It is the structure principally responsible for the reaction of gram staining
C. It is a unique flexible plastic structure
D. It contains D-isomers of amino acids
✅ The correct answer is option It is a unique flexible plastic structure.
407. Human immune deficiency virus is ________________ virus?
A. Rheo
B. Retro
C. Rhabdo
D. Flavi
✅ The correct answer is option Retro.
408. Which of the following is not a pox virus ?
A. Cowpox
B. Molluscum contagiosum
C. Small pox
D. chicken pox
✅ The correct answer is option chicken pox.
409. Gram -ve bacteria stain during gram staining____________?
A. Blue color
B. Red color
C. Green
D. Colorless
✅ The correct answer is option Red color.
410. The distinguishing characteristic of a positive delayed type hypersensitivity skin test is______________?
A. Erythema
B. Necrosis
C. Induration
D. Vasculitis
✅ The correct answer is option Erythema.