Lipids are important to living things for all of the following reasons, except that they are

The correct answer to the question above is that they needed to form cell membranes. Lipids are important to living things for all the reason (that should have been listed on the question,) except to the fact that they are in need to form cell membranes.

1.  The enzyme dicer cleaves dsRNA to form

small interfering RNA (siRNA).

2.  The siRNA binds to a special protein,  

which degrades one strand.

3. One strand of siRNA associates with the

protein to form an RNase complex.

4. The RNase complex binds to a specific

mRNA and degrades it.