Multiple Choice
All of these are similarities between the light reactions in photosynthesis and the electron transport chain/chemiosmosis in cellular respiration EXCEPT which of these answers?
9. Photosynthesis
Review of Photosynthesis
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During photosynthesis in chloroplasts, O2 is produced from __________ via a series of reactions associated with __________.
A
CO2; photosystem II
B
CO2; the Calvin cycle
C
H2O; photosystem I
D
CO2 ... both photosystem I and the Calvin cycle
E
H2O; photosystem II
Verified step by step guidance1
Understand the process of photosynthesis, which occurs in chloroplasts and involves two main stages: the light-dependent reactions and the Calvin cycle.
Recognize that oxygen (O2) production is part of the light-dependent reactions, specifically occurring in the thylakoid membranes of the chloroplasts.
Identify that water (H2O) is the molecule that is split during the light-dependent reactions, releasing oxygen as a byproduct. This process is known as photolysis.
Learn that photosystem II is the complex responsible for the initial step of the light-dependent reactions, where water is split to provide electrons, protons, and oxygen.
Conclude that the correct answer is 'H2O; photosystem II' because photosystem II is directly involved in the splitting of water to produce oxygen during photosynthesis.
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