A suspension of the cyanobacterium Chlamydomonas is actively carrying out photosynthesis in the presence of light and CO 2 . A. If you turned off the light, how would you expect the amounts of ribulose 1 , 5 – biphosphate and 3 – phosphoglycerate to change over the next minute? B. How about if you left the light on but removed CO 2 ?