Use the Accompanying Figure and the Molecules Labeled A, B

Multiple Choice

Use the accompanying figure and the molecules labeled A, B, C, D, and E to answer the following question. Refer to the figure. If the carbon atom of each of the incoming CO2 molecules is labeled with a radioactive isotope of carbon, which organic molecules will be radioactively labeled after one cycle?

A) C only
B) B, C, D, and E
C) C, D, and E only
D) B and C only
E) B and D only