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TLS Online TPP Program

#Question id: 10494

Sucrose is an osmotically active solute in guard cells, One implication of these osmoregulatory features is that stomatal opening & closing is associated with which of the following given statements?

#Unit 6. System Physiology – Plant
  1. Closing of stomata is associated with a decrease in sucrose content primarily and then opening of stomata associated with K+ uptake
  2. opening of stomata is primarily associated with K+ uptake, and closing of stomata is associated with a decrease in sucrose content
  3. opening of stomata is primarily associated with a decrease in sucrose content and closing of stomata is associated with K+ uptake
  4. opening of stomata is primarily associated with ions uptake and closing of stomata is associated with a increase in sucrose content
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TLS Online TPP Program

#Question id: 15848

#Unit 4. Cell Communication and Cell Signaling

viruses frequently expose unique chemical structures only during their replication inside host cells. Many of these can be detected via intracellular receptors that bind exposed chemical moieties while still inside the host cell. This can trigger an immediate antiviral response in the infected cell that blocks further virus replication. At the same time, this initiates the secretion of chemical warning signals sent to nearby cells to help them guard against infection (a neighborhood watch system!). virus is not recognised which receptor?
TLS Online TPP Program

#Question id: 15847

#Unit 4. Cell Communication and Cell Signaling

Pathogen-associated molecular patterns (or PAMPs) are common foreign structures that characterize whole groups of pathogens. It is these unique antigenic structures that the immune system frequently recognizes first. Animals, both invertebrates and vertebrates, have evolved to express several types of cell surface and soluble proteins that quickly recognize many of these PAMPs; a form of pathogen profiling. For example, encapsulated bacteria possess a polysaccharide coat with a unique chemical structure that is not found on other bacterial or human cells. White blood cells naturally express a variety of receptors, collectively referred to as pattern recognition receptors (PRRs), that specifically recognize these sugar residues, sugar residues is recognised by?
TLS Online TPP Program

#Question id: 15530

#Unit 4. Cell Communication and Cell Signaling

The activity of already differentiated effector and memory T cells is maintained by a receptor which are generally expressed on the memory and effector T cells. 
TLS Online TPP Program

#Question id: 15529

#Unit 4. Cell Communication and Cell Signaling

When does the T-cell anergy occur?
TLS Online TPP Program

#Question id: 15528

#Unit 4. Cell Communication and Cell Signaling

The B7 family of protein interact  with distinct receptor present on the T-cells, 
TLS Online TPP Program

#Question id: 15527

#Unit 4. Cell Communication and Cell Signaling

CD4 and CD8 T cells leave the thymus and enter the circulation as resting cells in which stage of the cell cycle?