Question

question 5 of 10
the diagram summarizes the steps of photosynthesis inside chloroplasts.
an excess of carbon dioxide (co2) in a chloroplast makes conditions there more acidic. such a change can cause protein molecules in cells to change shape and stop functioning. which change is most likely to happen if a chloroplast contains too much co2?
a. the amount of light entering the chloroplast increases.
b. the proteins that control the calvin cycle stop working.
c. the proteins that split h2o molecules start splitting co2.
d. the amount of o2 inside the chloroplast increases.

Explanation:

The prompt states that excess CO₂ makes conditions acidic and can cause proteins to change shape and stop functioning. The Calvin - cycle is controlled by proteins. So, if there is too much CO₂, the proteins controlling the Calvin cycle are likely to stop working.

Answer:

B. The proteins that control the Calvin cycle stop working.