Question

The question is from my oncology(cancer biology) class.. I don'tremember the exact question, but I think the question was..

"Explain in detail about 3 pathways of ras"

My professor wants a very long, detailed explaination for eachassignment... and I seriously have no idea, and didn't even startstudying the cell signaling part.

I will really really appreciate it if you could explain indetail, including what is ras.. and etc, etc...

p.s. The textbook for this course is cancer biology written byRobert. A. Weinburg