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How Are Photosynthesis And Cellular Respiration Related

The processes of Photosynthesis and respiration in cellular cells are two biochemical processes that are in sync. Photosynthesis needs substances from respiration, and respiration is dependent on photosynthesis products. These reactions enable cells to produce and store energy. They also aid in helping to regulate the atmospheric concentrations of oxygen and carbon dioxide.


Only autotrophic species like algae, plants, and some bacteria can produce Photosynthesis, and most organisms also perform respiration. Autotrophic organisms can perform respiration and Photosynthesis.

The photosynthesis process and cell respiration

Although both animals and plants utilize respiration, Photosynthesis is confined to green plants and only a handful of other species. But this does not mean it is only beneficial for the directly affected animals and plants. Both of these processes are essential for all living things on earth – directly or indirectly because they are linked. To understand the relationship between Photosynthesis and the process of respiration in cells, it is necessary to be aware of the fundamentals of each of these processes.


Photosynthesis is a method of synthesizing sugar (glucose) with sunlight (which serves as a radiation energy source), carbon dioxide, and water. Simply, it is a chemical process through which algae, plants, and various species of bacteria make their own food by using carbon dioxide, sunlight, and water. The equation for Photosynthesis will be 6CO2 + 6H2O energy, C6H12O6 and 6O2 in which carbon dioxide (CO2) and water (H2O) and sunlight are the reactants, and glucose (C6H12O6), as well as oxygen (O2), is the product of Photosynthesis.

Cellular Respiration

Through cell respiration, the biochemical energy that comes from nutrients is converted into triphosphate adenosine (ATP), which these organisms require to support numerous life activities. In simple terms, cellular respiration is a metabolic process in which glucose’s chemical bonds from food sources are transformed into energy, which is then utilized by various organisms, including humans, for different life-related processes. The chemical formula for the operation of cellular respiratory function is C6H12O6 + 6O2 + 6CO2 + H2O + energy released (2830 kJ/mol). In this equation, sugar (C6H12O6), along with oxygen (O2), are the reactants, and carbon dioxide (CO2), as well as water (H2O), along with energy, are the products.

Do trees help you breathe?

Remember the fact that plants release oxygen as the form of a result of Photosynthesis. It is essential to breathe oxygen to breathe. Do you know the reason? Cells carry out cellular respiration and produce ATP.

Connecting cellular respiration and Photosynthesis

Photosynthesis and cellular respiration are interconnected through a vital connection. This link allows living things to exist in the way we see them. One process’s products are reactions to the process that is opposite. Note that the formula for cellular respiration is the exact opposite of Photosynthesis.

Cellular Respiration: C6H12O6 + 6O2 – 6CO2 + 6H2O

Photosynthesis: 6CO2 + 6H2O – C6H12O6+ 6O2

Photosynthesis creates the glucose that is used by cells to produce ATP. The glucose is later transformed into carbon dioxide, which is utilized to make Photosynthesis. When the water breaks down to create oxygen during Photosynthesis, during cell respiration, oxygen is mixed with hydrogen, forming water. While Photosynthesis needs carbon dioxide, and oxygen is released. Cellular respiration needs oxygen and also releases carbon dioxide. We and many other organisms utilize this oxygen for their cellular respiration. We breathe in oxygen, and our blood transports it to all of our cells. Within our cells, oxygen lets cellular respiration continue. Cellular respiration functions best when oxygen is present. Without oxygen, less ATP could be created.

Photosynthesis and cellular respiration are vital components that makeup carbon cycling. The carbon cycle is one of the channels through which carbon is recycled through the biosphere. As cellular metabolism releases carbon dioxide into the atmosphere, Photosynthesis draws carbon dioxide from the atmosphere. The exchange of oxygen and carbon dioxide in Photosynthesis (Figure below) and cellular respiration globally assists in keeping carbon dioxide and oxygen levels in the atmosphere steady.


The equation that describes cellular respiration is the exact contradiction of Photosynthesis.

The exchange of oxygen and carbon dioxide through Photosynthesis, also known as cellular respiration around the world, helps keep atmospheric oxygen and carbon dioxide levels steady.

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