An example of an antigen that could stimulate naïve B-cell proliferation and differentiation without the help of a T cell would be a(n) ________ molecule from ________.
A) lipopolysaccharide; Proteus vulgaris
B) plasmid DNA; Yersinia pestis
C) protein A; Staphylococcus aureus
D) anthrax toxin; Bacillus anthracis
E) porin protein; Escherichia coli

Question

Quizplus · Accepted Answer

Lipopolysaccharide is a potent stimulator of the immune system and can activate B-cells directly, without the need for T-cell help. Proteus vulgaris is a Gram-negative bacterium that contains lipopolysaccharide in its cell wall. Plasmid DNA, protein A, anthrax toxin, and porin protein are all antigens that require T-cell help to stimulate naïve B-cell proliferation and differentiation.

An Example of an Antigen That Could Stimulate Naïve B-Cell