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TLS Online TPP Program

#Question id: 1425

During metastasis, cells may undergo an epithelial-to-mesenchymal transition whereby there is a(n):

#Unit 4. Cell Communication and Cell Signaling

  1. increase in cell polarity.

  2. loss of cell-cell-adhesion.

  3. down-regulation in the expression of the Snail and Twist transcription factors.

  4. decrease the production of proteases that digest the basement membrane

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TLS Online TPP Program

#Question id: 12026

#Unit 7. System Physiology – Animal

Pepsinogen is converted to its active form in the stomach by ________.
TLS Online TPP Program

#Question id: 1099

#Unit 4. Cell Communication and Cell Signaling

How does the toxin of Vibrio cholerae cause profuse diarrhea?
TLS Online TPP Program

#Question id: 18895

#Unit 13. Methods in Biology

Degree of scattering in transmission electron microscope is a function of
TLS Online TPP Program

#Question id: 8896

#Unit 9. Diversity of Life Forms

Chordate pharyngeal slits appear to have functioned first as
TLS Online TPP Program

#Question id: 5209

#Unit 11. Evolution and Behavior

If humans have 2,900 Mb, a specific member of the lily family has 120,000 Mb, and a yeast has ~13 Mb, why canʹt this data allow us to order their evolutionary significance