fluorescence occurs in nanoseconds (ns, 10–9 s); however, photochemistry in photosynthetic organisms occurs more rapidly, in picoseconds (ps, 10–12 s). Thus, when the 1,000‐fold more rapid pathway of photochemistry is available, little fluorescence is observed and photosynthesis proceeds with high efficiency. 

TLS Online TPP Program

#Id: 8489

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 1330

#Unit 4. Cell Communication and Cell Signaling

Phospholipase C cleaves PI(4,5)P2, generating two second messengers:  IP3 and DAG

TLS Online TPP Program

#Id: 4630

#Unit 13. Methods in Biology

 Antigen can be detected or measured by a sandwich ELISA .In this technique, the antibody (rather than the antigen) is immobilized on a microtiter well. 
A sample containing antigen is added and allowed to react with the immobilized antibody. After the well is washed, a second enzyme- linked antibody specific for a different epitope on the antigen is added and allowed to react with the bound antigen
After any free second antibody is removed by washing, substrate is added, and the colored reaction product is measured.

TLS Online TPP Program

#Id: 3845

#Unit 5. Developmental Biology

gp 150– help in migration of slug

TLS Online TPP Program

#Id: 2477

#Unit 13. Methods in Biology

Agarose gels are formed  by suspending dry agarose in aqueous buffer, then boiling the mixture until a clear solution forms.