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TLS Online TPP Program

#Question id: 1184

The order of events in a signaling pathway can be determined by the analysis of mutants. Cells that express a mutant defective Raf protein cannot be stimulated to proliferate uncontrollably by constitutively active RasD (dominant active). This indicates:

#Unit 4. Cell Communication and Cell Signaling

  1. quiescent cells can be induced to proliferate in the absence of growth factors if they contain a constitutively inactive mutant Raf protein.

  2. Raf is upstream of Ras in the signaling pathway.

  3. Ras is upstream of Raf in the signaling pathway.

  4. Ras mutants are recessive to Raf mutants.

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TLS Online TPP Program

#Question id: 12142

#Unit 10. Ecological Principles

Regarding the geographic range of a species, which of the following statements is true? 
TLS Online TPP Program

#Question id: 11055

#Unit 10. Ecological Principles

Poison arrow frogs have brightly coloured skin patterns of blue, orange, yellow and red. This skin adornment is an example of what kind of defense against predation?
TLS Online TPP Program

#Question id: 32242

#Unit 2. Cellular Organization

Which of the following is a strict requirement for a protein to exit the endoplasmic reticulum (ER)?
TLS Online TPP Program

#Question id: 23874

#Unit 13. Methods in Biology

Scientists developed a set of guidelines to address the safety of DNA technology. Which of the following is one of the adopted safety measures?
TLS Online TPP Program

#Question id: 27155

#Unit 7. System Physiology – Animal

Another name for vasopressin is