We can represent atoms by listing the number of protons, neutrons, and electrons—for example, 2p+, 2n0, 2e- for helium. Which of the following represents the 18O isotope of oxygen?

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: 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: 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: 15451

#Unit 4. Cell Communication and Cell Signaling

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

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: 15449

#Unit 4. Cell Communication and Cell Signaling

Class switch recombination of B-cell that is generated upon recognition of protein antigens and requires the participation of_____