Measurement of phytoplankton production, take sample of phytoplankton suspended in two bottles in lake. One bottle (D) is dark in colour but second bottle (L) light in colour. After some time productivity measure as follow Where Lo –oxygen concentration in light bottle, Do –oxygen concentration in Dark bottle, Io –oxygen concentration in bottle before incubation    

A)  Lo- Do                     B) Lo- Io  C) Io- Do

TLS Online TPP Program

#Question id: 14881

#Unit 4. Cell Communication and Cell Signaling

The paradigmatic adult stem cell niche, contains several cell types that coordinate HSC development, including in column I and column II

TLS Online TPP Program

#Question id: 14882

#Unit 4. Cell Communication and Cell Signaling

In bone marrow, stem cells are committed to different lineages. Factors that stimulate colonies of these different lineages are interleukin-3 (multi-CSF), IL-7,  granulocyte- macrophage colony stimulating factor (GM-CSF) and granulocyte or macrophage colony- stimulating factor (G-CSF or M-CSF). In a mouse deficient in IL-7 the number of which cells will not be altered

TLS Online TPP Program

#Question id: 14883

#Unit 4. Cell Communication and Cell Signaling

Where is double negative selection is found during T-cell formation?

TLS Online TPP Program

#Question id: 14884

#Unit 4. Cell Communication and Cell Signaling

Which types of cell shows the middle affinity towards the self proteins? 

TLS Online TPP Program

#Question id: 14885

#Unit 4. Cell Communication and Cell Signaling

Mature T cell is found in thymus in

TLS Online TPP Program

#Question id: 14886

#Unit 4. Cell Communication and Cell Signaling

Secondary lymphoid organ provide sites where lymphocytes encounter antigen, become activated, and undergo clonal expansion and differentiation into effector cells, include

a) spleen

b) lymph node

c) mucosa-associated lymphoid tissue

Which of the following are the effector cells of secondary lymphoid organ?