Practice Questions

TLS Online TPP Program

#Question id: 10708

Which of the following statements is a likely explanation for why invasive species take over communities into which they have been introduced?

#Unit 10. Ecological Principles

Invasive species are less efficient than native species in competing for the limited resources of the environment.
Invasive species are not held in check by the predators and agents of disease that have always been in place for native species.
Invasive species have a higher reproductive potential than native species.
Invasive species come from geographically isolated regions, so when they are introduced to regions where there is more competition, they thrive

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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_____

TLS Online TPP Program

#Question id: 15448

#Unit 4. Cell Communication and Cell Signaling

Stimulation of a single B cell would result in the generation of a clone of cells having_____

TLS Online TPP Program

#Question id: 15447

#Unit 4. Cell Communication and Cell Signaling

During development two types of B-cells will be formed:-

Some features about T1 and T2 cells given in below;

a) Maturity achieve

b) Found in blood circulation

c) Presence of Immunoglobulin IgM high and IgD low

d) Expressing CD21 and CD23

e) Cell expressing BAFF-R, Which bind with BAFF survival factor

Match the cell with their correct features;