Question

72) Antigen presentation by a Dendritic cell or macrophage causes

A) fever

B) clonal selection

C) a drop in antibody production

D) a dangerous drop in blood pressure

E) The end of The World

A= True   B=False

74) Following a second exposure the antibody titre is 1000X higher than the first exposure

75) The response seen is due to toll-like receptors and not memory cells

76) "B" antibodies will be found at high titre following a second exposure to B antigen

Toll like receptors and innate immunity

A) TLR 4       B) TLR 5    C) TLR 9    D) TLR 3

77) Binds viral RNA

78) Binds viral DNA

79) Binds bacterial Flagellin

80) Binds bacterial lipopolysaccharide

Answer 1

72. Antigen presentation (by a dendritic cell or macrophage) is important for triggering the immune response of the body during an infection. It causes B) clonal selection, which then leads to an increase in a diverse antibody population that combats the infection.

74. True. The antibody titre is 1000x higher in the second exposure.

75. False. Though toll-like receptors do help in recognizing the pathogenic molecules, it is the memory cells that are responsible for remembering the first exposure and producing a better response on the second exposure.

76. True. Same reason as 74.

The following do not require an explanation and have only been matched.

77. Binds viral RNA - TLR 3 (D)

78. Binds viral DNA - TLR 9 (C)

79. Binds bacterial Flagellin - TLR 5 (B)

80. Binds bacterial lipopolysaccharide - TLR 4 (A)