In chapter 11, we discussed the molecular basis of apoptosis. This process, and a key cell signaling molecule Ced-9 was discovered in C. elegans. What role does Ced-9 play in apoptosis?
1) Active Ced-9 functions as a cell death inhibitor
2) Inactive Ced-9 functions as a cell death inhibitor
3) The death signal inactivates Ced-9 and drives apoptosis
4) A and C
5) B and C