Multiple Choice
What is the primary role of chlorophyll in photosynthesis?
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9. Photosynthesis
Introduction to Photosynthesis
Multiple Choice
Which term describes ATP production resulting from the capture of light energy by chlorophyll?
A
Oxidative phosphorylation
B
Substrate-level phosphorylation
C
Chemiosmosis
D
Photophosphorylation
Verified step by step guidance1
Understand the context: ATP production in this case is related to photosynthesis, where light energy is captured by chlorophyll in plants, algae, and some bacteria.
Recall the term 'photophosphorylation': This refers specifically to the process of ATP synthesis driven by light energy during photosynthesis.
Differentiate photophosphorylation from other types of ATP production: Oxidative phosphorylation occurs in cellular respiration, substrate-level phosphorylation happens directly in metabolic reactions, and chemiosmosis is a mechanism involved in both oxidative phosphorylation and photophosphorylation.
Connect the process to the light-dependent reactions: In photosynthesis, light energy excites electrons in chlorophyll, which are transferred through the electron transport chain, creating a proton gradient across the thylakoid membrane.
Explain how ATP is synthesized: The proton gradient drives ATP synthase, an enzyme that catalyzes the conversion of ADP and inorganic phosphate (Pi) into ATP, completing the process of photophosphorylation.
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