In the nematode C. elegans, ced-9 prevents apoptosis in a normal cell in which of the following ways?
A) It prevents the caspase activity of ced-3 and ced-4.
B) Ced-9 remains inactive until it is signaled by ced-3 and other caspases.
C) Ced-9 cleaves to produce ced-3 and ced-4.
D) Ced-9 prevents blebbing by its action on the cell membrane.

Question

Quizplus · Accepted Answer

Ced-9 prevents apoptosis by inhibiting the activity of ced-3 and ced-4, which are caspases that initiate the apoptotic pathway. Ced-9 acts as an anti-apoptotic protein and binds to ced-4 to prevent its activation and subsequent activation of ced-3. Therefore, option A is the correct answer.

In the Nematode C