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The liquid-filled space surrounding the grana, where the Calvin cycle occurs, is the:

ACytosol
BMatrix
CStroma
DLumen
Answer & Solution
Correct answer: C. Stroma
1. Do not confuse stroma with stoma. 2. The Calvin cycle runs in the stroma. 3. Light reactions run in the thylakoid membrane. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._
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