T cells initiate the adaptive immune response by interacting MHC on antigen-presenting cells that have been exposed to pathogens. 

TLS Online TPP Program

#Id: 6998

#Unit 5. Developmental Biology

Numerous adult organs possess adult stem cells, which in most cases are multipotent.

TLS Online TPP Program

#Id: 4711

#Unit 13. Methods in Biology

Common colorimetric and UV absorption assays

TLS Online TPP Program

#Id: 2482

#Unit 13. Methods in Biology

The polymerization of acrylamide is an example of free-radical catalysis and is initiated by the addition of ammonium persulfate and the base N,N,N′,N′-tetramethylenediamine ( TEMED).

TLS Online TPP Program

#Id: 1009

#Unit 5. Developmental Biology

Mammalian sex determination is governed by the gonad-forming genes and by the hormones elaborated by the gonads.

TLS Online TPP Program

#Id: 3213

#Unit 4. Cell Communication and Cell Signaling