A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing which type of cell-to-cell signaling?

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#Question id: 1403

#SCPH28 | Zoology

Tumor-suppressor genes encode proteins with which of the following functions?

a. growth-promoting               b. growth-arresting                  c. pro-apoptotic

d. anti-apoptotic                      e. DNA repair

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#Question id: 3277

#SCPH28 | Zoology

Which of the following describes the most likely order of events in allopatric speciation?

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#Question id: 1396

#SCPH05 I Biotechnology

Trks are:

a. endonucleases.        b. transmembrane receptors.   c. proteases.     d. protein kinases.      

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#Question id: 2634

#I Life Science/ Life Sciences Group – I-V

Tryptophan, the end-product of the enzymes encoded by the trp operon, therefore acts as a co-repressor and inhibits its own synthesis through:

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#Question id: 1686

#SCPH01 Biochemistry

A hapten is best defined as being: