Practice Questions

TLS Online TPP Program

#Question id: 12482

The Rb protein has been called the “master brake” of the cell cycle. How the Rb protein acts as a cell cycle brake?

#Unit 2. Cellular Organization

Rb bound to E2F and function as transcriptional repressors because Rb recruits chromatin-modifying enzymes that promote deacetylation and methylation of specific histone lysines, causing chromatin to assume a condensed, transcriptionally inactive form.
S phase CDKs and mitotic CDKs maintain Rb protein in the phosphorylated state throughout the S, G2, and early M phases.
Rb bound to E2F and promotes ubiquitinylation of E2F and inhibits chromosomal segregation.
Rb bound to E2F and promotes acetylation which prevents unloading of cohesins.

More Questions

TLS Online TPP Program

#Question id: 3639

#Unit 3. Fundamental Processes

Replication of a bacterial chromosome normally starts at a fixed point called:

TLS Online TPP Program

#Question id: 23466

#General Aptitude

Statement— Should new big industries be started in Mumbai?

I) Yes. It will create job opportunities.

II) No. It will further add to the pollution of the city.

TLS Online TPP Program

#Question id: 19208

#Unit 12. Applied Biology

Nicotinic acid detection in whole cell biosensor can be done using

TLS Online TPP Program

#Question id: 9249

#Unit 9. Diversity of Life Forms

Which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex?

TLS Online TPP Program

#Question id: 19336

#Unit 12. Applied Biology

Which one of the following biosensors is used for therapeutic applications?