Use the Following to Answer the Questions Below

Use the following to answer the questions below:
On the left are characteristics of various reactions that occur in the chain elongation phase of fatty acid biosynthesis. Identify the step (1 through 4) of the chain elongation process to which each characterization applies using the response list on the right. Responses on the right may be used more than once or need not be used at all.

-A carbon-carbon double bond is converted to a carbon-carbon single bond.

A) step 1
B) step 2
C) step 3
D) step 4