Cytotoxic T cells release granules containing the proteins perforin and granzyme-B. 

TLS Online TPP Program

#Id: 1382

#Unit 4. Cell Communication and Cell Signaling

Profilin enhances the exchange of ADP for ATP on G-actin. Cofilin enhances the rate of loss of ADP-actin from the filament (−) end. Thymosin-β4, binds to ATP–G-actin in such a way that it inhibits addition of the actin subunit to either end of the filament.

TLS Online TPP Program

#Id: 6644

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 5508

#Unit 10. Ecological Principles

                                                                                                                                               

TLS Online TPP Program

#Id: 9188

#Unit 11. Evolution and Behavior

There are three basic modes of selection on a quantitative trait.

TLS Online TPP Program

#Id: 9006

#Unit 6. System Physiology – Plant

The signals flow from the chloroplast to the nucleus is retrograde:

plastidial ferrochelatase I catalyzes the synthesis of heme, which in turn regulates the expression of nuclear encoded, chloroplast‐targeted proteins in greening leaves.