Final answer:
The process that occurs in the grana of chloroplasts is the light-dependent reactions, producing ATP and NADPH used in the Calvin cycle. (option C)
Step-by-step explanation:
The stage that takes place in the grana is the light-dependent stage of photosynthesis. The grana are structures within the chloroplasts of plant cells where the light-dependent reactions occur. In this stage, light energy is absorbed by chlorophyll and converted into chemical energy in the form of ATP and NADPH, ultimately leading to the synthesis of molecular oxygen through the process of photolysis.
The light-dependent reactions are a crucial part of the overall photosynthetic process, capturing solar energy and converting it into chemical energy that can be utilized in the subsequent stages of photosynthesis, including the Calvin cycle. The specific organization of the thylakoid membrane in the grana allows for the efficient absorption of light and the generation of energy-rich molecules.
The light-dependent stage, occurring in the grana, is a pivotal step in photosynthesis, where solar energy is harnessed to produce ATP and NADPH. Understanding the spatial organization of photosynthetic structures enhances our comprehension of how plants efficiently convert light into chemical energy.