Monomeric Ras protein 

(∼170 amino acids) belongs to the GTPase superfamily of

intracellular switch proteins

TLS Online TPP Program

#Id: 2348

#Unit 3. Fundamental Processes

Transcription Is Initiated by RNA Polymerase without the Need for a Primer known as de novo synthesis 

TLS Online TPP Program

#Id: 9199

#Unit 11. Evolution and Behavior

Directional Natural selection

Directional selection favors individuals at one extreme of a phenotypic distribution that have greater reproductive success in a particular environment.

TLS Online TPP Program

#Id: 8811

#Unit 6. System Physiology – Plant

first and second excited singlet states in chlorophyll for a molecule that has two major absorption bands in blue and red.

TLS Online TPP Program

#Id: 9990

#Unit 4. Cell Communication and Cell Signaling

Rho GTPases are the “master builders” of the cell because they can activate an array of kinases and cytoskeletal binding proteins that remodel cytoskeletal elements to alter cell shape and movement

TLS Online TPP Program

#Id: 9300

#Unit 4. Cell Communication and Cell Signaling

Rhodopsin has two components: 

Opsin protein, member of the GPCR A family 

11-cis-retinal light-absorbing pigment