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TLS Online TPP Program

#Question id: 12431

Nitrifying bacteria participate in the nitrogen cycle mainly by

#Unit 10. Ecological Principles
  1. Converting nitrogen gas to ammonia.
  2. Releasing ammonium from organic compounds, thus returning it to the soil. 
  3. Converting ammonia to nitrogen gas, which returns to the atmosphere.
  4. Converting ammonium to nitrate, which plants absorb.
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TLS Online TPP Program

#Question id: 32304

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the structure shown

 
TLS Online TPP Program

#Question id: 31051

#Unit 4. Cell Communication and Cell Signaling

Which of the following EGF family Receptors do not undergo ligand-induced internalization?
TLS Online TPP Program

#Question id: 33368

#Unit 1. Molecules and their Interaction Relevant to Biology

At what oxygen concentration will myoglobin be 75% saturated with oxygen, if p50 = 2.8 torr
TLS Online TPP Program

#Question id: 1752

#Unit 4. Cell Communication and Cell Signaling

Dendritic cells can be driven from a resting state to an activated state by the T-cell surface molecule:
TLS Online TPP Program

#Question id: 2837

#Unit 2. Cellular Organization

The C-terminal activation domain of transcriptional activators is capable of
a. binding to DNA.                 
b. stimulating transcription.
c. interaction with other transcriptional machinery.
d. functioning in a fusion with a DNA-binding domain from an unrelated transcriptional activator.