The prospective lens cells secrete paracrine factors that instruct the optic vesicle to form the retina. 

TLS Online TPP Program

#Id: 1918

#Unit 4. Cell Communication and Cell Signaling

Generation of antibodies to T-dependent antigens

TLS Online TPP Program

#Id: 2882

#Unit 3. Fundamental Processes

Initiation at oriC requires the sequential assembly of a large protein complex on the membrane. 

TLS Online TPP Program

#Id: 8078

#Unit 13. Methods in Biology

TLS Online TPP Program

#Id: 7556

#Unit 6. System Physiology – Plant

Cytokinins are defined as compounds that have biological activities similar to those of trans-zeatin. These activities include the ability to do the following:

Induce cell division in callus cells in the presence of an auxin

Promote bud or root formation from callus cultures when in the appropriate molar ratios to auxin

Delay senescence of leaves

Promote expansion of dicot cotyledons

TLS Online TPP Program

#Id: 759

#Unit 3. Fundamental Processes

Four Steps for bacterial transcription

1. Promoter search->closed promoter complex -> open promoter complex

2. Abortive transcription->Promoter Escape->Initiation from +1 TSS 

3. Elongation

4. Termination