Multiple Choice
Which part of the photosystem is responsible for accepting a light photon?
233
views
12. Photosynthesis
Light Dependent Reactions
Multiple Choice
In the light-dependent reactions of photosynthesis, how do chloroplasts capture energy from sunlight?
A
Mitochondrial electron transport chains in the chloroplast inner membrane use sunlight to pump protons.
B
Enzymes in the stroma directly convert sunlight into glucose through the Calvin cycle.
C
Chlorophyll and other pigments in the thylakoid membranes absorb photons and excite electrons in photosystems.
D
ATP synthase absorbs photons to phosphorylate ADP without an electron transport chain.
Verified step by step guidance1
Understand that the light-dependent reactions of photosynthesis occur in the thylakoid membranes of chloroplasts, where pigments like chlorophyll play a key role.
Recognize that chlorophyll and other pigments absorb photons (light energy), which excites electrons to a higher energy state within photosystems.
Know that these high-energy electrons are transferred through an electron transport chain embedded in the thylakoid membrane, which helps generate a proton gradient.
Realize that the proton gradient drives ATP synthase to produce ATP by phosphorylating ADP, but ATP synthase itself does not absorb photons directly.
Distinguish that the Calvin cycle, which occurs in the stroma, uses ATP and NADPH produced in the light-dependent reactions to synthesize glucose, but it does not directly convert sunlight into glucose.
Related Videos
Related Practice
