volume_mute
Provide the definition
publish date: 2026/06/15 18:20:22.176010 UTC
Inside the chloroplast, surrounding all the internal membrane structures, is a protein-rich fluid.
This fluid matrix is called the (1).
Please drag and drop the selected option in the right place or type it instead
stroma
matrix
cytosol
nucleoplasm
Correct Answer
(1) stroma
Explanation
The stroma is the protein-rich fluid matrix that fills the interior of the chloroplast, surrounding the grana and lamellae. It is the site of the carbon fixation (Calvin cycle) reactions of photosynthesis, where CO₂ is converted into sugars using the energy captured during the light reactions.
Reference
Biology: A Self-Teaching Guide