Pertussis toxin, produced by Bordetella pertussis, catalyzes ADP-ribosylation of the  subunit of Gαi, preventing GDP-GTP exchange and blocking inhibition of adenylyl cyclase.

TLS Online TPP Program

#Id: 2025

#Unit 8. Inheritance Biology

Auxotrophs or Mutant bacterial strains can be isolated on the basis of their nutritional requirements.

TLS Online TPP Program

#Id: 1050

#Unit 5. Developmental Biology

Fgf8 is the major active factor in the AER.

TLS Online TPP Program

#Id: 9203

#Unit 11. Evolution and Behavior

Balance natural selection

Balancing selection is a type of natural selection that maintains genetic diversity in a population.

In balancing selection, two or more alleles are kept in balance, and therefore are  maintained in a population over the course of many generations.

TLS Online TPP Program

#Id: 1701

#Unit 4. Cell Communication and Cell Signaling

Neutrophils constitute the majority (50% to 70%) of circulating leukocytes Eosinophils (1%–3%), Basophils (1%), or Mast cells (1%).

TLS Online TPP Program

#Id: 9691

#Unit 4. Cell Communication and Cell Signaling

Movement of the GSVs to the plasma membrane is regulated by two monomeric GTP-binding proteins -RalA and Rab10