TLS Online TPP Program

#Id: 2384

#Unit 3. Fundamental Processes

More than 90% of the genes expressed in mammals are alternatively spliced

TLS Online TPP Program

#Id: 6349

#Unit 8. Inheritance Biology

Dosage compensation

Equalization in males and females of the amount of protein produced by X-linked genes.

Each female cell one of the two X chromosome becomes inactive. Which X chromosome is inactivated is random.

The Xist (X inactive specific transcript) gene located on the X chromosome, in required for inactivation. 

TLS Online TPP Program

#Id: 10329

#Unit 4. Cell Communication and Cell Signaling

Binding of the extracellular TCR domain to a MHC-peptide complex triggers activation of ZAP70 protein tyrosine kinases attached to the cytosolic domains of the two adjacent ζ chains. 

TLS Online TPP Program

#Id: 1748

#Unit 4. Cell Communication and Cell Signaling

Expression of class II molecules by B cells is down-regulated by IFN- .

TLS Online TPP Program

#Id: 565

#Unit 2. Cellular Organization

Molecules that induce enzyme synthesis but are not metabolized are called gratuitous inducers such as IPTG