能者拿分!谢过了.

题目

能者拿分!谢过了.
1.Structure of the Toll-like receptor shown in Figure 33.1 can be described as a __________.
a) monomer
b) dimer
c) trimer
d) α2β2 tetramer
e) α2β2γ2 hexamer
2.The leucine-rich repeat domain from human TLR-3 is has a(n) __________ β sheet structure.
a) parallel
b) antiparallel
c) mixed
d) cyclic
e) inverted
3.Effector functions of an antibody molecule are carried out by which of its domain(s)?
a) one Fab domain
b) two Fab domains
c) Fc domain
d) Fab and Fc domains together
e) Fab or Fc domain,depending on the particular situation
4.Which of the following incorrectly describes the functionality of the given cell type?
a) B lymphosites:Produce antibodies.
b) cytotoxic T lymphosites:Kill cells that have been invaded by a pathogen.
c) helper T lymphocytes:Stimulate the differentiation and proliferation of B cells and T cells.
d) antigen presenting cells:express class II MHC molecules on th

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