Final answer:
In photosynthesis, the energy carrier molecule formed in the light-dependent phase is ATP, which is crucial for fueling the subsequent Calvin cycle to produce sugars.
Explanation:
In the light-dependent phase of photosynthesis, the energy carrier molecule that is formed is called ATP (adenosine triphosphate). ATP, along with NADPH, carries the energy absorbed from sunlight to power the light-independent reactions in the Calvin cycle, where sugars are produced.
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