Which of the following apply to fibronectins? Please select all that apply.

a) They are disulphide linked dimers, with each polypeptide composed of a number of binding domains joined together by short flexible segments.

b) They have an essential role in linking the extracellular matrix to its underlying cells.

c) Like integrins, fibronectins are directly connected to the cytoskeleton.

d) They participate in 'inside out' and 'outside in' signalling mechanisms.

TLS Online TPP Program

#Question id: 15450

#Unit 4. Cell Communication and Cell Signaling

T-cell dependent response requires a signal is provided by an activated T cell, which binds to the B cell through,

a) lipopolysaccharide moiety

b) its antigen receptor 

c) A separate interaction between CD40L on the B cell and CD40 (CD154) on the activated TH cell

d) A separate interaction between CD40 on the B cell and CD40L (CD154) on the activated TH cell

TLS Online TPP Program

#Question id: 15451

#Unit 4. Cell Communication and Cell Signaling

T-cell dependent, B-cell activation require many signals except___

TLS Online TPP Program

#Question id: 15452

#Unit 4. Cell Communication and Cell Signaling

During  activation of B-cell, T cell delivers cytokines and other signals to its partner B cell. Which types of cytokine signals secreted by T-cells?

TLS Online TPP Program

#Question id: 15453

#Unit 4. Cell Communication and Cell Signaling

Activated B cells divide and differentiate into antibody-producing plasma cells, this process occurred in 

TLS Online TPP Program

#Question id: 15454

#Unit 4. Cell Communication and Cell Signaling

B cells migrate to the lymphoid follicles, they are directed by chemokine interaction_________, which is secreted by follicular dendritic cells (FDCs)

TLS Online TPP Program

#Question id: 15455

#Unit 4. Cell Communication and Cell Signaling

Variable region of antibody containing sequence motif DGYW/WRCH, which are responsible for mutation, where R, W, H represented as____