Photosynthesis vs. Cellular Respiration: Know the Difference
By Shumaila Saeed || Updated on December 25, 2023
Photosynthesis is a process in plants converting light energy to chemical energy, while cellular respiration is the process in cells converting nutrients to energy, releasing carbon dioxide.
Key Differences
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can be later released to fuel the organism's activities. In contrast, cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP).
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Dec 16, 2023
During photosynthesis, carbon dioxide and water are converted into oxygen and glucose using sunlight. Cellular respiration, on the other hand, involves breaking down glucose and oxygen to produce carbon dioxide, water, and energy (ATP).
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Dec 16, 2023
Photosynthesis is primarily performed by plants, algae, and certain bacteria, playing a crucial role in absorbing carbon dioxide and releasing oxygen into the atmosphere. Cellular respiration occurs in almost all living organisms, both aerobic and anaerobic, and is vital for producing energy required for cellular processes.
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Dec 16, 2023
The process of photosynthesis occurs in the chloroplasts of plant cells, utilizing chlorophyll to capture sunlight. Cellular respiration mainly takes place in the mitochondria of cells, efficiently generating energy through the breakdown of glucose.
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Dec 16, 2023
Photosynthesis and cellular respiration are interdependent processes. The oxygen and glucose produced during photosynthesis are utilized in cellular respiration, while the carbon dioxide produced during cellular respiration is used in photosynthesis.
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Comparison Chart
Primary Function
Converts light energy into chemical energy.
Converts nutrients into ATP (energy).
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Main Occurrence
In plants, algae, and some bacteria.
In almost all living organisms.
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Photosynthesis and Cellular Respiration Definitions
Photosynthesis
Process involving carbon dioxide absorption and oxygen release.
Photosynthesis helps reduce carbon dioxide in the atmosphere.
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Cellular Respiration
Process of breaking down glucose to produce energy in cells.
Cellular respiration is crucial for energy production in muscles.
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Dec 10, 2023
Photosynthesis
Process by which green plants use sunlight to synthesize foods.
Photosynthesis in plants is essential for their growth.
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Dec 10, 2023
Cellular Respiration
Essential for maintaining the energy balance in organisms.
All living organisms rely on cellular respiration for energy.
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Dec 10, 2023
Photosynthesis
Conversion of light energy to chemical energy in plants.
Trees undergo photosynthesis to produce glucose.
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Cellular Respiration
Converts biochemical energy from nutrients into ATP.
During exercise, cellular respiration rates increase.
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Photosynthesis
Occurs in plant chloroplasts using chlorophyll.
Chlorophyll is vital for the process of photosynthesis.
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Cellular Respiration
Takes place in the mitochondria of cells.
Mitochondria are the powerhouses of the cell, driving cellular respiration.
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Dec 10, 2023
Photosynthesis
Essential for energy production in the plant kingdom.
Without photosynthesis, plants would not have energy to grow.
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Dec 10, 2023
Cellular Respiration
Involves the release of carbon dioxide and water.
Cellular respiration is responsible for our breathing out carbon dioxide.
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Dec 10, 2023
Photosynthesis
The process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and a source of hydrogen (usually water), using light as an energy source. Most forms of photosynthesis release oxygen as a byproduct.
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Dec 08, 2023
Photosynthesis
(biology) Any process by which plants and other photoautotrophs convert light energy into chemical energy,
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Dec 08, 2023
Photosynthesis
Principally, oxygenic photosynthesis, any process by which plants and algae convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy.
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Dec 08, 2023
Photosynthesis
Also, non-oxygenic photosynthesis, used by purple and green bacteria, heliobacteria, and acidobacteria.
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Photosynthesis
The process of constructive metabolism by which carbohydrates are formed from water vapor and the carbon dioxide of the air in the chlorophyll-containing tissues of plants exposed to the action of light. It was formerly called assimilation, but this is now commonly used as in animal physiology. The details of the process are not yet clearly known. Baeyer's theory is that the carbon dioxide is reduced to carbon monoxide, which, uniting with the hydrogen of the water in the cell, produces formaldehyde, the latter forming various sugars through polymerization. Vines suggests that the carbohydrates are secretion products of the chloroplasts, derived from decomposition of previously formed proteids. The food substances are usually quickly translocated, those that accumulate being changed to starch, which appears in the cells almost simultaneously with the sugars. The chloroplasts perform photosynthesis only in light and within a certain range of temperature, varying according to climate. This is the only way in which a plant is able to organize carbohydrates. All plants without a chlorophyll apparatus, as the fungi, must be parasitic or saprophytic.
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Dec 08, 2023
Photosynthesis
Synthesis of compounds with the aid of radiant energy (especially in plants)
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Repeatedly Asked Queries
What is cellular respiration?
The process of converting nutrients into energy within cells.
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Dec 16, 2023
What does cellular respiration produce?
It produces ATP, water, and carbon dioxide.
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Dec 16, 2023
What is photosynthesis?
A process where plants convert sunlight into chemical energy.
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Dec 16, 2023
What is the main site for cellular respiration?
Cellular respiration mainly occurs in the mitochondria.
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Dec 16, 2023
Why is photosynthesis important for the environment?
It absorbs CO2 and releases oxygen, supporting life.
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Do all plants perform photosynthesis?
Most plants do, but some parasitic plants do not.
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How does photosynthesis affect the atmosphere?
It helps regulate oxygen and carbon dioxide levels.
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How does photosynthesis benefit humans?
It produces oxygen and is essential for food production.
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What are the key inputs for photosynthesis?
Sunlight, water, and carbon dioxide.
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Can humans perform cellular respiration?
Yes, it's a vital process for energy in human cells.
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Is cellular respiration a form of breathing?
It's a metabolic process, different from physical breathing.
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Is sunlight necessary for cellular respiration?
No, sunlight is not required for cellular respiration.
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What organisms perform cellular respiration?
Almost all living organisms, including plants and animals.
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Can cellular respiration occur without oxygen?
Yes, anaerobic respiration occurs without oxygen.
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Dec 16, 2023
What role does ATP play in cellular respiration?
ATP is the main energy currency produced.
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Dec 16, 2023
Is glucose a product of cellular respiration?
Glucose is a reactant, not a product, in cellular respiration.
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How does photosynthesis impact food chains?
It's the primary energy source at the base of most food chains.
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Dec 16, 2023
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About Author
Written by
Shumaila SaeedShumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.