Splicing of pre-tRNAs is catalyzed by proteins, not by RNAs. 

TLS Online TPP Program

#Id: 8894

#Unit 2. Cellular Organization

Syntelic attachment 

Both kinetochores of a sister chromatid pair can attach to microtubules from the same pole

TLS Online TPP Program

#Id: 8895

#Unit 2. Cellular Organization

Monotelic attachment 

only one kinetochore can attach to microtubules

TLS Online TPP Program

#Id: 8897

#Unit 2. Cellular Organization

Sensing mechanism used by cells to detect incorrect chromosome attachments is based on tension.

TLS Online TPP Program

#Id: 8898

#Unit 2. Cellular Organization

If Amphitelic attachment occur  Microtubules pull kinetochores; cohesins resist this pulling force. The resulting tension leads to the outer kinetochore component Ndc80 being pulled away from the protein kinase Aurora B

TLS Online TPP Program

#Id: 8900

#Unit 2. Cellular Organization

The Aurora protein kinase family members Aurora A and Aurora B and their associated regulatory factors sense kinetochores that are not under tension and sever these microtubule attachments

TLS Online TPP Program

#Id: 8901

#Unit 2. Cellular Organization

Condensin association with chromosomes is facilitated by mitotic CDKs and Aurora B, which phosphorylate histone H2A, allowing condensins to bind chromatin.