20 describe the chemical and biological processes that take place during photosynthesis and cellular respiration.

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen.

Then Respiration processes, cells use oxygen and glucose to synthesize energy-rich carrier molecules, such as ATP, and carbon dioxide is produced as a waste product.

Processes above and be sure to mention the movement of electrons and energy as the carbon atom moves from one reaction to another.