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Describe the similarities between photosynthesis and respiration.

Plants, humans and animals, all depend on the cycle of photosynthesis and respiration for survival.

The oxygen produced by the plants during the process of photosynthesis is what animals and humans inhale for the blood to transport to the cells for respiration.

And the CO2 produced during the respiration process is released from humans or animals and absorbed by the plants to facilitate endow with the energy they require for the development. This is the never-ending cycle that generally sustains life on earth.

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


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

Photosynthesis occurs in Chloroplast, whereas respiration occurs in mitochondria.


Differences between Photosynthesis and Respiration

Parameters Photosynthesis Respiration
Takes place in It takes place in Algae, plants, and photosynthetic bacteria It takes place in all living organisms.
Function It captures, converts, and stores energy It releases energy
Purpose It converts light energy from the sun that is converted into chemical energy and stored in the glucose bonds Here the chemical energy is stored into the glucose that is released to produce the ATP for cell
Metabolic Process The 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

Reactants Wate, Light energy and Carbon Dioxide Oxygen and Glucose
Energy source Sunlight Glucose
Location The chloroplast of the plant’s cell Glycolysis takes place in the cytoplasm while the mitochondria are the site of Krebs cycle, ETC
Electron Carriers NADPH NADPH and FADH2
Products Glucose and Oxygen Water and Carbon Dioxide
Equation 6CO2 + 6H2O –––> C6H12O6 + 6O2 C6H12O6 + 6O2 –––> 6CO2 + 6H2O


Bottom Line!

Both respiration and photosynthesis include the energy conversions from one form to another through the biochemical reaction’s series.

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

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