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TLS Online TPP Program

#Question id: 5718

aneuploids may arise through nondisjunction, the failure of homologous chromosomes or sister chromatids to separate in meiosis. which of following the incorrect about nondisjuction ?

#Unit 8. Inheritance Biology

  1. Meiosis I non-disjunction leads to produce all gamete become aneuploidy

  2. Only Meiosis II non-disjunction leads to produce 50 % gamete become aneuploidy other 50% become normal diploid

  3. Only  Meiosis I non-disjunction leads to produce 50 % gamete n+1 and other 50% become n-1

  4. Either meiosis I or meiosis II nondisjuction  lead to produce aneuploidy gamete.

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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?
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)