Question

question 2
1 pts
which photosynthetic reaction requires carbon dioxide?
calvin cycle
light reaction

question 3
1 pts
which of the following indicates the stroma?
5
4
2
1

Explanation:

• Question 2: The Calvin cycle (also known as the light - independent reaction) uses carbon dioxide (\(CO_2\)) to synthesize organic molecules (like glucose). It occurs in the stroma of chloroplasts. The light reaction, on the other hand, mainly involves the absorption of light energy, splitting of water (\(H_2O\)), and production of ATP and NADPH.
• Question 3: The stroma is the fluid - filled space inside the chloroplast, surrounding the thylakoid membranes. In the given diagram, label 1 indicates the stroma. Label 2 likely represents the thylakoid membrane or part of the grana (stacked thylakoids), label 4 could be the thylakoid lumen or an internal thylakoid structure, and label 5 might be the chloroplast envelope (outer membrane).

Answer:

• Question 2: Calvin cycle
• Question 3: 1