Which of the following statements about Ras signaling is TRUE O Ras is an exampl

Question

Which of the following statements about Ras signaling is TRUE O Ras is an example of a molecular switch because it is activated by MAPK phosphorylation and inactivated by MAPKK phosphatase. O Upon activation, Ras protein is translocated into the nucleus where it activates gene transcription O Ras is activated when Ras-GEF is recruited to an activated receptor kinase complex. Ras is an example of an ion channel-coupled receptor involved in neuronal signaling O Ras is activated by adenylyl cyclase and Ca2+

Explanation / Answer

Ras proteins usually works as binary molecular switches and controls intracellular signalling networks.it regulates a lot of signalling pathways such as cell proliferation, apoptosis, cell differentiation, cell migration, and cell adhesion.

it also activates some of the pathways such as MAPK(mitogen-activated protein kinase cascade) this cascade helps in transmission of signals downstream and results in the transcription of genes involved in cell growth and division.

****so, the correct answer is "B"(SECOND OPTION)

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