Question

question 9 of 10
what is carbon dioxide used for in the chloroplasts of green plants?
a. to make glucose and oxygen
b. to slow down photosynthesis
c. to make carbon dioxide and water
d. to break down large food molecules

Explanation:

During photosynthesis in chloroplasts, plants use carbon dioxide ($CO_2$) and water ($H_2O$) in the presence of sunlight to produce glucose ($C_6H_{12}O_6$) and oxygen ($O_2$). The chemical equation for photosynthesis is $6CO_2 + 6H_2O \xrightarrow{light} C_6H_{12}O_6+6O_2$. Carbon dioxide is not used to slow down photosynthesis (B is wrong). Making carbon dioxide and water (C is wrong) is the opposite of photosynthesis (which is cellular respiration). Breaking down large food molecules (D is wrong) is related to processes like digestion, not the role of $CO_2$ in chloroplasts for photosynthesis.

Answer:

A. To make glucose and oxygen