Plant Cell Structure · Botany

What is the fluid matrix inside a chloroplast called?

  1. Cytosol
  2. Matrix
  3. Lumen only
  4. Stroma
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Correct answer: Stroma

The stroma is the fluid-filled region inside chloroplasts surrounding the thylakoids. It contains enzymes for the Calvin cycle and also contains chloroplast DNA and ribosomes.

Difficulty: Medium Question 12 of 20

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