Question

What is a class of extracellular cues that is important for flipping the switch for signaling pathways?

A) Growth factors
B) Checkpoint kinases
C) Cyclin-dependent kinases (Cdks)
D) Tumor suppressor genes

Answer 1

Growth factors are a class of extracellular cues that are important for flipping the switch for signaling pathways. They bind to cell-surface receptors and stimulate cell growth and division.

Step-by-step explanation:

The class of extracellular cues that is important for flipping the switch for signaling pathways is growth factors. Growth factors are ligands that bind to cell-surface receptors and stimulate cell growth and division. They activate a signaling pathway that includes protein kinases, such as receptor tyrosine kinases (RTKs), which then trigger the activation of downstream signaling molecules, ultimately leading to cell division.