A Growth factor is a polypeptide that stimulates cell proliferation. When it binds to its receptor, the RAS and MAPK pathway is activated.
Which action best describes this pathway?

Question

A Growth factor is a polypeptide that stimulates cell proliferation. When it binds to its receptor, the RAS and MAPK pathway is activated.  
 Which action best describes this pathway?

Answer

Ras hydrolyses GTP to GDP and activates Raf, the first kinase in the MAP kinase pathway.

Answer

The occupied growth factor receptor auto phosphorylates serine residues.

Answer

Ras exchanges GDP for GTP and activates adenyl cyclase.

Answer

Grb2 changes conformation and binds directly to RAS in the signal transduction pathway.

Answer

Grb2 uses its SH2 domain to bind to the phosphorylated receptor.

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A Growth factor is a polypeptide that stimulates cell proliferation. When it bin...

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