Retroviral Vectors Retroviruses have RNA genomes that are used as templates for reverse transcriptase to synthesize a DNA copy that can be inserted into the host cell genome.

TLS Online TPP Program

#Id: 7550

#Unit 6. System Physiology – Plant

In the absence of gibberellin, the DELLA proteins positively regulate GID1, GA20ox, and GA3ox (plus signs), and negatively regulate GA2ox (minus sign). Conversely, both bioactive gibberellin and the GID1 receptor enhance DELLA repressor degradation (plus signs), while GA2ox blocks DELLA repressor degradation (minus signs).

TLS Online TPP Program

#Id: 710

#Unit 3. Fundamental Processes

Deletion of dat causes initiation to occur more frequently. This significantly increases the amount of DnaA available to the origin

TLS Online TPP Program

#Id: 9379

#Unit 11. Evolution and Behavior

Caused of behaviour

Proximate causes - The subject of cell biology, neurobiology, and many other biological disciplines

Ultimate causes - Their historical causes, especially the action of natural selection

TLS Online TPP Program

#Id: 952

#Unit 5. Developmental Biology

In sea urchins, the acrosome reaction is initiated by sulfate-containing polysaccharides in the egg jelly.

TLS Online TPP Program

#Id: 10521

#Unit 4. Cell Communication and Cell Signaling