Use the following figure and the compounds labeled A, B, C, D, and E to answer the following questions.

Figure 10.2
-If the carbon atom of the incoming CO₂ molecule 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

Question

Use the following figure and the compounds labeled A, B, C, D, and E to answer the following questions.
  
Figure 10.2
-If the carbon atom of the incoming CO₂ molecule 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

Quizplus · Accepted Answer

In the Calvin cycle, CO₂ is fixed into an organic molecule. The carbon from CO₂ is incorporated into a 3-carbon compound, which is then used to form other molecules in the cycle. Thus, B, C, D, and E will all contain the radioactive carbon after one cycle.

Use the Following Figure and the Compounds Labeled A, B