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: 13081

#SCPH06 I Botany

Correct statements about RAPD’s
A. RAPD polymorphism is detected by using oligonucleotides usually more than 10 bases long of random sequences as primers in a reaction.
B. In a strain which has in genomic DNA sequences complementary to the primer oligonucleotide, PCR products will be detected in the gel,
C. Typical RAPD markers show limited variation between parents, especially in naturally inbreeding species.
D. RAPDs are more sensitive than RFLPs to experimental conditions making them more difficult to be consistent and reproducible.
TLS Online TPP Program

#Question id: 20982

#SCPH01 Biochemistry

Which is considered as the most recalcitrant of the BTEX compounds, and of greatest regulatory concern because of its associated health impacts?
TLS Online TPP Program

#Question id: 6957

#SCPH06 I Botany

The effect of grafting an extra piece of notochord into a dorsal position adjacent to pre-somitic mesoderm is
TLS Online TPP Program

#Question id: 18385

#SCPH06 I Botany

Oil is a natural product, has many components and is biodegradable, the different components being degraded at different rates but still oil spills are considered as recalciterants because
TLS Online TPP Program

#Question id: 10786

#SCPH05 I Biotechnology

Alkaloids are usually synthesized from one of a few common amino acids such as___