Precision will be reduced, but yield will be increased

Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.

In blue white screening insertional activation of Beta-D-galactosidase will give rise to

TLS Online TPP Program

#Question id: 15447

#Unit 4. Cell Communication and Cell Signaling

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

I) T1 cell

II) T2 cell

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;

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: 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: 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?