U1 snRNA consist of four hairpins, one intron pairing strands and one sm binding domains.

TLS Online TPP Program

#Id: 6708

#Unit 3. Fundamental Processes

Conversion of specific uridine residues to pseudouridine and the addition of methyl groups to the 2′-hydroxyl groups

of specific riboses, that are important for the proper assembly and function of snRNPs in pre-mRNA splicing. 

These modifications occur in Cajal bodies, where they are directed by a class of snoRNA-like guide RNA molecules called scaRNAs (small Cajal body–associated RNAs)

TLS Online TPP Program

#Id: 7114

#Unit 6. System Physiology – Plant

In the absence of ethylene, ETR1 and the other ethylene receptors activate the kinase activity of CTR1. This leads to a repression of the ethylene response pathway, possibly through a MAP kinase cascade. 

The binding of ethylene to the ETR1 dimer results in its inactivation, which causes CTR1 to become inactive.

TLS Online TPP Program

#Id: 9581

#Unit 11. Evolution and Behavior

Carboniferous - First reptile

TLS Online TPP Program

#Id: 2321

#Unit 3. Fundamental Processes

Splice sites are directional in nature. 5’ splice site -the left, or donor, site and the 3’ splice site - right, or acceptor, site.

TLS Online TPP Program

#Id: 9524

#Unit 6. System Physiology – Plant

The amount of direct injury to the plant is low, when these insects serve as vectors for plant viruses they can cause great damage.