alleryStart learning →Which part of the chloroplast is the fluid-filled space surrounding the grana?
AThe stroma
BThe lumen
CThe matrix
DThe cytosol
Answer & Solution
Correct answer: A. The stroma
1. The stroma is the fluid-filled space surrounding the grana inside a chloroplast.
2. The light-independent reactions of photosynthesis take place there.
3. The lumen is the space inside a thylakoid, on the other side of that membrane.
4. Matrix is the equivalent word for the inside of a mitochondrion, which is a different organelle.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.1 Overview of Photosynthesis_
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