You have identified an enzyme that appears to be involved in the addition of palmityl group (a fatty acid)to certain proteins.Knowing that palmitoylated proteins are usually targeted for delivery to the plasma membrane,in which organelles might this enzyme be expressed?
A)Golgi apparatus and endoplasmic reticulum
B)Golgi apparatus and nucleus
C)Endoplasmic reticulum and ribosomes
D)Endoplasmic reticulum and nucleus

Question

Quizplus · Accepted Answer

The addition of a fatty acid (palmityl group) to proteins is a process known as palmitoylation. Palmitoylated proteins are usually targeted for delivery to the plasma membrane. The Golgi apparatus is responsible for modifying and sorting proteins for delivery to their final destination, while the endoplasmic reticulum is involved in protein synthesis and lipid metabolism. Therefore, it is likely that the enzyme involved in palmitoylation of proteins would be expressed in organelles involved in protein modification and lipid metabolism, such as the Golgi apparatus and endoplasmic reticulum. Option A includes both of these organelles.

You Have Identified an Enzyme That Appears to Be Involved