In 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 signalled by ced-3 and other caspases.
C)Ced-9 cleaves to produce ced-3 and ced-4.
D)Ced-9 enters the nucleus and activates apoptotic genes.
E)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 caspases, which are responsible for initiating the apoptotic pathway. Therefore, Option A, which states that Ced-9 prevents the caspase activity of ced-3 and ced-4, is the correct answer. Option B is incorrect because Ced-9 is active and inhibitory in its normal state. Option C is incorrect because Ced-9 does not cleave to produce ced-3 and ced-4. Option D is incorrect because Ced-9 does not enter the nucleus or activate apoptotic genes. Option E is incorrect because Ced-9 does not prevent apoptosis by acting on the cell membrane.

In C Elegans, Ced-9 Prevents Apoptosis in a Normal Cell in in Which