Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 44423
TLS Online TPP Program

#Question id: 12182

The cell cycle is controlled by protein kinases that comprise a catalytic subunit and a regulatory subunit. Which of the following statement is correct regarding to these subunits?

#SCPH06 I Botany
  1. The catalytic subunits, the cyclin-dependent kinases (CDKs), have no kinase activity unless they are dissociated with a regulatory cyclin subunit. 
  2. Each CDK can associate with a small number of different cyclins, which determine the substrate specificity of the complex—that is, which proteins it phosphorylates.
  3. Cyclin-CDK complexes activate or inhibit hundreds of proteins involved in cell cycle progression by phosphorylating or dephosphorylating them at specific regulatory sites. 
  4. Proper progression through the cell cycle is governed by activation of the appropriate homodimeric protein kinase complex at the appropriate time.
More Questions
TLS Online TPP Program

#Question id: 8918

#SCPH28 | Zoology

In individual insects of some species, whole chromosomes that carry larval genes are eliminated from the genomes of somatic cells at the time of metamorphosis. A consequence of this occurrence is that
TLS Online TPP Program

#Question id: 3676

#SCPH01 Biochemistry

Which function can be carried out by DNA replication proteins?
TLS Online TPP Program

#Question id: 2072

#SCPH01 Biochemistry

Which of the following structures would decrease the electrochemical gradient across a membrane?
TLS Online TPP Program

#Question id: 12943

#SCPH28 | Zoology

Choose the correct order for the steps involve in Insitu hybridization.
1. Cell permeaabilisation
2. Detection of hybridised probe radioactive.
3. Wash excess probe from section
4. Cell fixation
TLS Online TPP Program

#Question id: 8854

#SCPH28 | Zoology

Which cells in a sponge are primarily responsible for trapping and removing food particles from circulating water?