Test
micro
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (10)
11- lipid A is a cell wall component of :
- Agram - positive bacteria
- Bgram - negative bacteria
- Cfungi
- Dalgae
22- all of the followings about mesosomes are true except :
- Apresent in prokaryotes
- Blateral type play arole in cell division
- CInvaginations from CM
- Dhigh efficiency of active transport
33- which is the following statement is true concerning fimbriae :
- Amost gram -ve bacteria have aset of fimbraie
- Bpresent only in motile strains
- Conce removed they do not regenerate during cell growth
- Dthey are longer & thicker than flagella
44- the following acts as areceptor site for attractants & repellents :
- Asex pili
- Bcell membrane
- Cflagella
- Dcell wall
55- failure to synthesize CW leads to production of :
- Amycoplasma
- Bspheroplast
- Cnone of the above
- Dall of the above
6positive selection of T cells :
- A(a)cell recognising self Ag are selected to survive
- B(b)cells recognizing foreign MHC are selected to die
- C(c)result in self tolerance
- D(d)occure in Bm
- E(e)cells recognising MHc mol are selected to survive
7positive feed back stimulation of T cells is mediated by
- A(a)IfN gama
- B(b)Il2
- C(c)Cd40l
- D(d)none of the above
8Naive T &B cell lymphocytes are
- A(a)effector cells
- B(b)mature cells befor encoutering Ag
- C(c)present in scondary lymphoid organs
- D(d)all above
- E(e) b&c
9MHC class 2 on Apcs is recognized by t cell through
- A(a)CD8
- B(b)TcR
- C(c)CD 4
- D(d)CD3
- E(e) b&c
10which of following interact with MHC for stabilization
- A(a)CD4
- B(b)CD 3
- C(c)TCR
- D(d)TLRs
Información
- Descripción
- microbiology exam
- Autor
- atbaa2020
- Idioma
- English
- Visitas
- 175
- Etiquetas
- Valoración
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