AP BIOLOGY

Detailed explanation-1: -Both of these choices are correct because the Calvin cycle occurs in the interior lumen/space of a chloroplast called the stroma. This is where the light-independent reactions (the Calvin cycle) occur to fix CO2 to make sugar.

Detailed explanation-2: -Answer and Explanation: The Calvin cycle occurs in the stroma of chloroplasts inside plant cells. Chloroplasts are green organelles derived from cyanobacteria and are the site of photosynthesis in plants.

Detailed explanation-3: -Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts).

Detailed explanation-4: -Explanation: The Calvin cycle takes place in the stroma area in the chloroplasts. The mitochondria is another organelle, and the nucleus contains the DNA. The thylakoids are in the chloroplasts and contain the pigment chlorophyll in which the light reactions occur.

Detailed explanation-5: -In plants and algae, which developed much later, photosynthesis occurs in a specialized intracellular organelle-the chloroplast. Chloroplasts perform photosynthesis during the daylight hours. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules.