Practice Questions

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?

#Section 3: Genetics, Cellular and Molecular Biology

The catalytic subunits, the cyclin-dependent kinases (CDKs), have no kinase activity unless they are dissociated with a regulatory cyclin subunit.
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.
Cyclin-CDK complexes activate or inhibit hundreds of proteins involved in cell cycle progression by phosphorylating or dephosphorylating them at specific regulatory sites.
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: 10808

#Section 6: Plant, Animal and Microbial Biotechnology

Many plants also contain unusual amino acids, called nonprotein amino acids, these Nonprotein amino acids are often very similar to common protein amino acids. Canavanine, for example, is a close analog of_____A______, and azetidine-2-carboxylic acid has a structure very much like that of_____B________.

TLS Online TPP Program

#Question id: 3723

#Section 3: Genetics, Cellular and Molecular Biology

Nick translation is a process for

TLS Online TPP Program

#Question id: 15563

#Section 5: Bioprocess Engineering and Process Biotechnology

How long will it take for the initial concentration of A to fall from 0.20 M to 0.075, if the rate constant for a reaction of zero-order in A is 0.035 mol L^–1 s^–1.

TLS Online TPP Program

#Question id: 3873

#Section 3: Genetics, Cellular and Molecular Biology

The excision (splicing) of many group I introns requires, in addition to the primary transcript RNA: