In Order to Elucidate the Calvin Cycle, Calvin and His

Multiple Choice

In order to elucidate the Calvin cycle, Calvin and his colleagues used two-dimensional paper chromatography to analyze the presence of different molecules under different conditions. What did they conclude from the accumulation of RuBP when CO₂levels were low?

A) RuBP only reacts with CO₂in the sunlight.
B) RuBP only reacts with CO₂when concentrations of ATP are low.
C) RuBP is the first substrate to react with CO_2.
D) RuBP is the last substrate to react in the Calvin cycle.
E) CO₂serves as a non-competitive inhibitor of rubisco.