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?

#Unit 2. Cellular Organization

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

#Question id: 11716

#Unit 10. Ecological Principles

Macroecology addresses patterns of range size and population density. Which of the following statements is true?

#Question id: 3375

#Unit 11. Evolution and Behavior

	Evolutionary force		Caused
A	Mutation	i	Increase genetic variation within population
B	Genetic Drift	ii	Decrease genetic variation within population
C	Migration	iii	Decrease genetic variation between population
		iv	Increase genetic variation between population

Which of the following combination is correct?

#Question id: 11016

#Unit 7. System Physiology – Animal

A ventricular depolarization wave when traveling −90° in the frontal plane will cause a large negative deflection in which lead?

#Question id: 864

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one is not the appropriate function of Heat Shock Proteins;

#Question id: 796

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement best describes the distinction between the purposes of the two RNAi pathways within the eukaryotic cell?