Multiple Choice
In an introduction to photosynthesis, which type of organisms perform photosynthesis as their primary method of producing organic molecules?
9. Photosynthesis
Introduction to Photosynthesis
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In oxygenic photosynthesis, what kind of energy is required to drive the light-dependent reactions?
A
Chemical energy stored in glucose molecules
B
Light energy (photons) absorbed by chlorophyll
C
Mechanical energy generated by ATP synthase rotation
D
Thermal energy (heat) from the environment
Verified step by step guidance1
Understand that oxygenic photosynthesis consists of two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle).
Recognize that the light-dependent reactions occur in the thylakoid membranes of chloroplasts and require an initial input of energy to drive the process.
Identify the source of this energy as light energy, specifically photons, which are absorbed by pigment molecules like chlorophyll.
Know that the absorbed light energy excites electrons, initiating the electron transport chain that leads to the production of ATP and NADPH.
Conclude that the energy driving the light-dependent reactions is light energy (photons), not chemical, mechanical, or thermal energy.
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