Final answer:
The reaction referred to in the question is photosynthesis, specifically the light-independent reactions or Calvin cycle that occur in the stroma of the chloroplast. This stage of photosynthesis is sometimes mistakenly called the 'dark reactions'.
Step-by-step explanation:
The reaction referred to in the question is photosynthesis. Photosynthesis in plants involves two stages: the light-dependent reactions and the light-independent reactions, also known as the Calvin cycle. The light-independent reactions occur in the stroma of the chloroplast and are sometimes referred to as the 'dark reactions', although this term is outdated and misleading.