Question

which corrections would change the diagram to accurately model the light - dependent reaction of photosynthesis? check all that apply. co₂ should be changed to h₂o. adp and atp need to be switched. e⁻ should be changed to h⁺. chemical energy should be changed to light energy. psii and psi need to be switched.

Explanation:

• In the light - dependent reactions of photosynthesis, water (\(H_2O\)) is the electron donor, not \(CO_2\). So changing \(CO_2\) to \(H_2O\) is correct.
• Light energy is used to drive the reactions in the thylakoid membrane (where PSII and PSI are located). So changing "Chemical energy" to "light energy" is correct.
• PSII (Photosystem II) comes before PSI (Photosystem I) in the electron - transport chain of the light - dependent reactions. So switching PSII and PSI is correct.
• ADP is phosphorylated to ATP in the light - dependent reactions, so ADP and ATP should not be switched.
• Electrons (\(e^-\)) are transferred through the electron - transport chain, not \(H^+\) (protons are pumped, but the electron carriers carry \(e^-\)).

Answer:

• \(CO_2\) should be changed to \(H_2O\)
• Chemical energy should be changed to light energy
• PSII and PSI need to be switched