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For muscle cells and liver cells,

Do they transcribe the same genes? Why do they not transcribe the same genes? Please explain why.

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Jamar Ferry
Jamar FerryLv2
28 Sep 2019

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Related questions

Understand that cells with different, specialized function would have differences in the number and variety of cellular organelles (and be able to give examples). Understand how cells carrying the same genes can nevertheless specialize in function (e.g. liver vs. muscle).

Explain what homoebox ( or hox) genes are and what they do?

Why do all animals, both vertebrates and nonvertebrates share the same hox genes?

The lab you work in has discovered a previously unidentified extracellular signal molecule called QGF. You add purified QGF to different types of cells to determine its effect on these cells. When you add QGF to heart muscle cells, you observe an increase in cell contraction. When you add it to fibroblasts, they undergo cell division. When you add it to nerve cells, they die. When you add it to glial cells, you do not see any effect on cell division or survival.

A) How can the same signaling molecule cause such diverse affects? Why do the glial cells not respond at all?

B) Using effectors and second messengers discussed in class, devise a signaling pathway that QGF could use to increase contractions in in the heart. (Hint: Ca2+ is very important for muscle contraction)

C) Using effectors and second messengers discussed in class, devise a signaling pathway that QGF could use to lead to apoptosis of nerve cells. Give possible proteins or genes that need to be activated or inactivated.

D) Using effectors and second messengers discussed in class, devise a signaling pathway that QGF could use to induce cell division in the fibroblast cells? Give possible proteins or genes that need to be activated or inactivated.

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