Multiple choice

To what does the term stroma refer?

  1. The double membrane of the chloroplasts

  2. A flattened disk or sac in the chloroplast

  3. A central fluid filled space in the chloroplast

  4. The cytochrome system in the membranes of the thylakoids

  5. A stack of thylakoid membrane structures

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The stroma is the fluid-filled space within the chloroplast that surrounds the thylakoid membranes, where the Calvin cycle occurs.

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