Two different types of microtubule structures can exist, 

one in the T form bound to GTP 

one in the D form bound to GD

TLS Online TPP Program

#Id: 6499

#Unit 3. Fundamental Processes

RNA polymerase II terminates after a short distance; small oligonucleotides of 4–5 nt are unstable; crystal structures of these RNA/DNA hybrids are unordered. Only longer hybrids have proper base pairing. The short RNA products are degraded rapidly. The suggestion is that this abortive initiation is a form of promoter proofreading.

TLS Online TPP Program

#Id: 5002

#Unit 6. System Physiology – Plant

Circadian rhythm in the diurnal movements of Albizia leaves.

TLS Online TPP Program

#Id: 1101

#Unit 2. Cellular Organization

P3 ATPases transports-H+ & Mg+2 

7. P4 ATPases are flippases, transports phospholipids 

PS, PC and PE.

TLS Online TPP Program

#Id: 2937

#Unit 3. Fundamental Processes

DnaA is provided by its response to phospholipids. Phospholipids promote the exchange of ATP with ADP bound to DnaA.

TLS Online TPP Program

#Id: 5911

#Unit 3. Fundamental Processes

Each Okazaki fragment starts with a primer sequence of RNA 10 bases long that provides the 3’–OH end for extension by DNA polymerase