Cryptochromes under blue light causes

1.Suppression of hypocotyl elongation

2.Promotion of cotyledon expansion

3.Membrane depolarization

4.Inhibition of petiole elongation

5.Anthocyanin production

6.Circadian clock entrainment

TLS Online TPP Program

#Id: 2434

#Unit 3. Fundamental Processes

The efficiency of a rut site increases with the length of the C-rich/G-poor region.

TLS Online TPP Program

#Id: 2435

#Unit 3. Fundamental Processes

Rho is a member of the family of hexameric ATP-dependent helicases. Each subunit has an RNA-binding domain and an ATP hydrolysis domain. 

TLS Online TPP Program

#Id: 2436

#Unit 3. Fundamental Processes

Rho has an N-terminal, RNA-binding domain and a C-terminal ATPase domain. A hexamer in the form of a gapped ring binds RNA along the exterior of the N-terminal domains. The 5’ end of the RNA is bound by a secondary binding site in the interior of the hexamer.

TLS Online TPP Program

#Id: 2437

#Unit 3. Fundamental Processes

The initial form of rho is a gapped ring, but binding of the RNA converts it to a closed ring.

TLS Online TPP Program

#Id: 2438

#Unit 3. Fundamental Processes

Rho needs to translocate along RNA from the rut site to the actual point of termination.

TLS Online TPP Program

#Id: 2439

#Unit 3. Fundamental Processes

The coupling between transcription and translation has important consequences for rho action. Rho must first have access to RNA upstream of the transcription complex and then moves along the RNA to catch up with RNA polymerase.