Question

which diagram represents the correct conversion of molecules by the labeled cell structures? (the image shows three diagrams with cell structures: chloroplast and mitochondrion, showing the input and output of molecules like co₂, h₂o, c₆h₁₂o₆, o₂, and atp.)

Explanation:

Chloroplasts perform photosynthesis, using $\text{CO}_2$ and $\text{H}_2\text{O}$ to produce $\text{C}_6\text{H}_{12}\text{O}_6$ (glucose) and $\text{O}_2$. Mitochondria perform cellular respiration, using $\text{C}_6\text{H}_{12}\text{O}_6$ and $\text{O}_2$ to produce $\text{CO}_2$, $\text{H}_2\text{O}$, and ATP. The first model correctly maps these inputs and outputs to the organelles: chloroplast takes in $\text{H}_2\text{O}$ and $\text{CO}_2$ to make $\text{C}_6\text{H}_{12}\text{O}_6$ and $\text{O}_2$, then mitochondria uses those products to make ATP, $\text{CO}_2$, and $\text{H}_2\text{O}$.

Answer:

The leftmost (first) model: Chloroplast takes in $\text{H}_2\text{O}$ and $\text{CO}_2$ to output $\text{C}_6\text{H}_{12}\text{O}_6$ and $\text{O}_2$; Mitochondria takes in $\text{C}_6\text{H}_{12}\text{O}_6$ and $\text{O}_2$ to output ATP, $\text{CO}_2$, and $\text{H}_2\text{O}$.