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TLS Online TPP Program

#Question id: 61

Which of the following correctly describes chemical equilibrium?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Forward and reverse reactions continue with no net effect on the concentrations of the reactants and products.

  2. Concentrations of products are higher than the concentrations of the reactants.

  3. There are equal concentrations of products and reactants while forward and reverse reactions continue.

  4. There are equal concentrations of reactants and products, and the reactions have stopped.

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TLS Online TPP Program

#Question id: 33701

#Unit 2. Cellular Organization

Select all correct options 
A. Satellite DNA has a very short repeating sequence and no coding function.
B. Satellite DNA occurs in small blocks that can have distinct physical properties.
C. Satellite DNA is often the major constituent of facultative heterochromatin.
TLS Online TPP Program

#Question id: 19691

#Unit 13. Methods in Biology

The QT interval of an electrocardiogram (ECG) includes the  
TLS Online TPP Program

#Question id: 2832

#Unit 2. Cellular Organization

Reporter genes are used to

a. express enzymes that are not easily assayed in cell extracts.

b. express enzymes that are easily assayed in cell extracts.

c. characterize DNA control elements.                     

d. characterize reporter plasmids.
TLS Online TPP Program

#Question id: 31054

#Unit 4. Cell Communication and Cell Signaling

Active Raf subsequently phosphorylates activation loop of MEK on one or two:
TLS Online TPP Program

#Question id: 31359

#Unit 13. Methods in Biology

Which of the following microscopy uses photoswitchable fluorophores that can be switched between a "on" (fluorescent) and "off" (dark) state, allowing only a small subset of molecules to be illuminated at a time, enabling precise localization of each individual molecule.