Question 70
(Multiple Choice)
Use the following figure and the compounds labelled A,B,C,D,and E to answer the following questions.
-To identify the molecule that accepts CO₂,Calvin and Benson manipulated the carbon-fixation cycle by either cutting off CO₂ or cutting off light from cultures of photosynthetic algae.They then measured the concentrations of various metabolites immediately following the manipulation.How would these experiments help identify the CO₂ acceptor? Study the figure above to help you in determining the correct answer.
A)The CO₂ acceptor concentration would decrease when either the CO₂ or light are cut off.
B)The CO₂ acceptor concentration would increase when either the CO₂ or light are cut off.
C)The CO₂ acceptor concentration would increase when the CO₂ is cut off, but decrease when the light is cut off.
D)The CO₂ acceptor concentration would decrease when the CO₂ is cut off, but increase when the light is cut off.
E)The CO₂ acceptor concentration would stay the same regardless of the CO₂ or light.
Answer