What is the correct relationship between receptor tyrosine kinases and Ras proteins?
A)Phosphorylated Ras proteins activate the tyrosine kinase.
B)Phosphorylated Ras proteins pair with a tyrosine kinase to activate other proteins.
C)Tyrosine kinase dimers phosphorylate the Ras proteins directly.
D)Tyrosine kinase dimers use GAPs and GNRPs to regulate Ras proteins.

Question

Quizplus · Accepted Answer

Tyrosine kinase dimers do not directly phosphorylate Ras proteins. Instead, they initiate a cascade of events involving GTPase-activating proteins (GAPs) and guanine nucleotide-releasing proteins (GNRPs) that regulate the activity of Ras proteins. Ras proteins are small GTPases that toggle between an active GTP-bound state and an inactive GDP-bound state, playing a crucial role in transmitting signals from receptor tyrosine kinases to downstream pathways that control cell growth and differentiation.

What Is the Correct Relationship Between Receptor Tyrosine Kinases and Ras