Inactive PKA is a tetramer consisting of- 

two regulatory (R) subunits

two catalytic (C) subunits

TLS Online TPP Program

#Id: 5799

#Unit 7. System Physiology – Animal

TLS Online TPP Program

#Id: 8683

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 9042

#Unit 4. Cell Communication and Cell Signaling

Heterotrimeric G proteins directly bind to and are activated by G protein coupled receptors.

TLS Online TPP Program

#Id: 3035

#Unit 3. Fundamental Processes

The clamp associated with the core on the lagging strand dissociates at the end of each Okazaki fragment and reassembles for the next fragment.

TLS Online TPP Program

#Id: 2146

#Unit 9. Diversity of Life Forms

Homoplasy is similarity arrived at via independent evolution.