Question

Null mutations in ced-9 lead to what?

a) Increased apoptosis
b) Decreased apoptosis
c) Cell proliferation
d) DNA repair

Answer 1

Null mutations in ced-9 lead to increased apoptosis.

Step-by-step explanation:

Null mutations in ced-9 lead to increased apoptosis.

The gene CED-9 in the nematode Caenorhabditis elegans functions as an inhibitor of apoptosis. When there is a null mutation in the ced-9 gene, it means that the gene is not able to perform its inhibitory function effectively. As a result, apoptosis is no longer suppressed, leading to an increase in programmed cell death.