Describe the Similarities between Photosynthesis and Respiration

Most plants and animals depend on the cycle of photosynthesis and respiration for survival.

The oxygen we breathe comes from plants and algae during the process of photosynthesis.

It’s during the process of respiration that humans and animals release CO2 (carbon dioxide) and it is absorbed by plants which use it for energy for growth. In other words, this is how life sustains itself on earth.

Photosynthesis and cellular respiration are products of a system that are reactants to each other.

Similarities between Photosynthesis and Cellular Respiration
Similarities between Photosynthesis and Cellular Respiration

What is photosynthesis?

Photosynthesis is the process that involves the energy used from water, sunlight, and carbon dioxide to produce oxygen and glucose. Plants use the photosynthesis process to produce energy.

What is Respiration?

Respiration uses oxygen and glucose to produce water and carbon dioxide. The process of respiration breaks down the energy for use.

Similarities between Photosynthesis and Respiration

  • Both processes involve energy production
  • Both processes involve gases exchange
  • Both processes take place in the cell organelle that was considered an endosymbiotic organism.
  • Both involve reduction-oxidation reaction and electron transport chain
  • Both processes synthesize and utilize ATP
  • Both the processes of phosphorylation and electron carriers

Similarities explanation

  • Both involve chemical energy production (ATP)

In Photosynthesis, ATP is generated through light energy and utilized to make the organic molecules, whereas, in respiration, ATP is produced by breaking down the organic molecules.

  • Both include ATP production involving an electron transport chain and chemiosmosis.

In photosynthesis, the electrons are donated by the chlorophyll, and protons accumulate within the thylakoid’s lumen, whereas in respiration, electrons are donated by hydrogen carriers. Protons accumulate in the intermembrane space.

  • Both take place in cell organelles.

Photosynthesis occurs in the Chloroplast, whereas respiration occurs in mitochondria.

  1. Similarities between photosynthesis and cellular respiration in terms of Energy Conservation:

Photosynthesis and cellular respiration are two energy conversion mechanisms used by living cells to convert light and chemical energy respectively, into useful organic compounds important for their metabolic reactions.

  1. Similarities between photosynthesis and cellular respiration in terms of ATP Generation:

Both photosynthesis and cellular respiration ultimately generate ATP (adenosine triphosphate), the energy unit of the cell.

  1. Similarities between photosynthesis and cellular respiration in terms of the life cycle of living things:

Photosynthesis and cellular respiration are complementary processes, both involved in the life cycle of living beings on earth. Oxygen and organic molecules produced by photosynthetic organisms using sunlight energy are used by animals in cellular respiration, releasing carbon dioxide and water. The carbon dioxide and water are then reabsorbed during photosynthesis to generate again oxygen and organic compounds in the never-ending life cycle.

Differences between Photosynthesis and Respiration

ParametersPhotosynthesisRespiration
Takes place inIt takes place in Algae, plants, and photosynthetic bacteriaIt takes place in all living organisms.
FunctionIt captures, converts, and stores energyIt releases energy
PurposeIt converts light energy from the sun that is converted into chemical energy and stored in the glucose bondsHere the chemical energy is stored in the glucose that is released to produce the ATP for the cell
Metabolic ProcessThe metabolic process here is anabolic. Here the energy from ATP NADPH, and CO2 are utilized to produce the glucose molecules.The metabolic process is catabolic. Here the glucose is broken down to produce the CO2 and energy in the form of NADH, ATP, and FADH2
ReactantsWate, Light energy, and Carbon DioxideOxygen and Glucose
Energy sourceSunlightGlucose
LocationThe chloroplast of the plant’s cellGlycolysis takes place in the cytoplasm while the mitochondria are the site of the Krebs cycle, ETC
Electron CarriersNADPHNADPH and FADH2
ProductsGlucose and OxygenWater and Carbon Dioxide
Equation6CO2 + 6H2O –––> C6H12O6 + 6O2C6H12O6 + 6O2 –––> 6CO2 + 6H2O

Bottom Line!

Respiration and photosynthesis both convert the energy found in one form to that of another through a series of biochemical reactions starting with one molecule.

Both processes produce ATP in reactions, which are carried out on the membranes and controlled by the enzymes. Both reaction cycles involve redox reactions.

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