Which of the following describes the role of GTPase-activating proteins (GAPs) in regulating G protein activity?
Question 2
In a cellular signaling pathway, if a receptor tyrosine kinase (RTK) dimerizes and autophosphorylates, what is the immediate consequence that leads to the activation of downstream signaling pathways?
Question 3
Which of the following best describes the mechanism by which nitric oxide (NO) acts as a signaling molecule?
Question 4
Consider a scenario where a cell needs to rapidly respond to a sudden increase in an extracellular signaling molecule. Which of the following signaling mechanisms would likely provide the fastest cellular response?
Question 5
Which of the following describes the role of inositol triphosphate (IP$_{3}$) and diacylglycerol (DAG) as second messengers?
