What is the main difference, from an energy point of view, between photosynthesis and biological nitrogen fixation?

Biochemical pathways are important for plant growth and development. Minerals are the vital substances that are required for plant structure formation and overall development. Using inorganic compounds, plants produce organic molecules that are essential for the plant's growth and development. For all these processes energy is used in the form of adenosine triphosphate (ATP).

Photosynthesis is the process where the plant synthesizes its food from inorganic molecules and produces organic molecules such as carbon dioxide and glucose. Glucose is the source of energy. In the case of nitrogen fixation, plants use nitrites, and nitrates that are converted from atmospheric nitrogen. Some bacteria are present in root nodules that help in nitrogen fixation.

The major difference between these two processes is; Photosynthesis is an energy-producing process where energy is formed in the form of glucose and is stored in the plant cells. On the other hand, nitrogen fixation is an energy-consuming process. It requires energy.