Relationship Between Photosynthesis and Respiration in Biology

Daytime is reserved for essential bodily processes like photosynthesis and cellular respiration, whereas nighttime is spent breathing. Leaves, like other tissues that are metabolically active, breathe at night. To breathe carbon dioxide, they oxidize. Consequently, the oxygen produced by photosynthesis is exactly the same as the oxygen required by living cells for respiration.

Relationship Between Photosynthesis and Cellular Respiration

Photosynthesis also makes use of the carbon dioxide that is produced during respiration. “As a result, the leaves and the air are not exchanging any gases at now. The compensation level describes this.” The intensity of the light has a positive effect on the rate of photosynthesis. That’s why we have to pump out much more CO2. Only via respiration is carbon dioxide supplied.

The oxygen produced by photosynthesis is more than that produced by respiration. As a result, we exhale oxygen and breathe in carbon dioxide.


The green component of plants uses carbon dioxide, water, and photosynthesis to convert sunlight into sugar via a photochemical process called photosynthesis. The oxygen is released while the sugar and other organic components get their energy from the light.

Photosynthesis Procedure

The most crucial of these is water, which is used in the absorption of hydrogen by plants during photosynthesis. There should be plant-nourishing minerals present in water. The elements most often found in these compounds include nitrogen, sulfur, phosphorus, potassium, calcium, magnesium, sodium, and iron.

Roots are the plants’ main source of hydration and mineral uptake. In their pursuit of nutrients and moisture, plants often develop unusually lengthy root tips. Little roots have thousands of thin root filaments that extend from their surfaces, wrapping themselves around soil particles to take up nutrients.


Sugar is produced using a part of the water taken up by the plant’s roots. The remainder is a result of leaf activity. Plants die when transpired water evaporates faster than it can be absorbed by the roots.


During respiration, oxygen is used to break down calorie-rich organic substances (like glucose) to fuel the body’s many cellular processes. The breakdown of glucose results in the production of carbon dioxide.

Photorespiration and its Consequence

Photosynthesis is the name given to the respiration process that plants engage in throughout the day. As a result, photosynthesis is a light-dependent process. Carbon dioxide is exhaled and oxygen is taken in during this procedure. During the first step in photosynthesis, it takes in oxygen from the atmosphere. No ATP or other forms of energy production utilize this oxygen.

The oxygen-repairing “carboxylase ribose diphosphate” (Rubisco) enzyme plays a role here. Rubisco fixes carbon dioxide as part of the Calvin cycle. As a result, photosynthesis slows down the pace at which plants stabilize carbon dioxide and expand (learn more).

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