Main difference – Chemosynthesis vs Photosynthesis

Chemosynthesis and also photosynthesis room the two main production mechanisms where organisms develop their own food. Both procedures are involved in the production of basic sugars choose glucose starting from carbon dioxide and water. The main difference between chemosynthesis and also photosynthesis is that chemosynthesis is the process which synthesizes the necessary compounds in the cell by the energy generated from chemistry reactions whereas photosynthesis is the process which synthesizes organic compounds by the energy acquired from the sunlight.

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1. What is Chemosynthesis – Definition, Characteristics, Process 2. What is Photosynthesis – Definition, Characteristics, Process 3. What is the difference in between Chemosynthesis and also Photosynthesis


What is Chemosynthesis

Chemosynthesis is the synthetic of essential compounds v the usage of energy obtained by oxidizing inorganic compounds. Chemosynthesis occurs in the absence of sunlight, in places like hydrothermal vents in the deep ocean. Organisms life in hydrothermal vents utilize inorganic compounds coming the end from the seafloor as their resource of power for the production of food. Thus, hydrothermal vents consist of high biomass consisting of sparse circulation of animals, who rely on the food dropping down by chemosynthesis. Chemosynthesis is greatly done by microbes, i m sorry are discovered on the seafloor, creating microbial mats. Scaleworms, limpets, and snails favor grazers deserve to be discovered on the mat eat it. Predators come and eat these grazers together well. Animals like tube worms are found living together symbionts v chemosynthetic bacteria. Gigantic tube worms alongside a hydrothermal vent are shown in figure 1.


Figure 1: gigantic tube worms next to a hydrothermal vent

During chemosynthesis, bacteria usage the power stored in chemical bonds of either hydrogen sulfide or hydrogen gas in order to create glucose from dissolved carbon dioxide and also water. The chemical reaction for the use of hydrogen sulfide in chemosynthesis is presented below.

12H2S + 6CO2 → C6H12O6 (Glucose) + 6H2O  + 12S

The organisms which perform chemosynthesis are dubbed chemotrophs. Chemoorganotrophs and also chemolithotrophs are the two categories the chemotrophs. Chemolithotrophs use electrons from not natural chemical sources choose hydrogen sulfide, ammonium ions, ferrous ions and also elemental sulfur. Acidithiobacillus ferrooxidans which is an steel bacteria, Nitrosomonas i beg your pardon is a nitrosifying bacteria, Nitrobactor which is a nitrifying bacteria, sulfur oxidizing proteobacteria, aquificaeles and methanogenic archaea are the examples chemolithotrophs.

What is Photosynthesis

Photosynthesis is the process in which the environment-friendly plants and algae synthesize glucose kind carbon dioxide and water by making use of sunlight together the resource of energy. The pigment chlorophyll is affiliated in this process. In plants, photosynthesis occurs in specialized plastids called chloroplasts. Greater plants consist of leaves, containing much more chlorophyll in bespeak to carry out the photosynthesis efficiently.


Figure 2: Photosynthesizing leaves

Two categories of photosynthesis are found: oxygenic photosynthesis and anoxygenic photosynthesis. Oxygenic photosynthesis occurs in cyanobacteria, algae, and plants, whereas anoxygenic photosynthesis occurs in violet sulfur bacteria and also green sulfur bacteria. During oxygenic photosynthesis, the electrons space transferred from water come carbon dioxide. Thereby, water is oxidized and also carbon dioxide is reduced, producing glucose. Hence, the electron donor in oxygenic photosynthesis is water. Oxygen gas is a by-product the oxygenic photosynthesis. In contrast, anoxygenic photosynthesis walk not create oxygen together a by-product. The electron donor is variable and it have the right to be hydrogen sulfide. The chemistry reactions the both oxygenic and also anoxygenic photosynthesis are shown below.

Oxygenic photosynthesis:

6CO2 + 12H2O + Light energy → C6H12O6 + 6O2 + 6H2O

Anoxygenic photosynthesis:

CO2 + 2H2S + Light power → <CH2O> + 2S + H2O

The organisms which carry out photosynthesis are dubbed phototrophs. Photoautotrophs and also photoheterotrophs room the two categories of phototrophs. The carbon source of photoautotrophs is carbon dioxide whereas the carbon resource of photoheterotrophs is essential carbon. Environment-friendly plants, cyanobacteria, and algae are instances of photoautotrophs and some bacteria prefer Rhodobactor are instances for photoheterotrophs.

Difference between Chemosynthesis and Photosynthesis

Energy Source

Chemosynthesis: Energy source of chemosynthesis is the chemical power stored in inorganic chemicals favor hydrogen sulfide.

Photosynthesis: Energy resource of photosynthesis is sunlight.

Energy Conversion

Chemosynthesis: Chemical energy stored in inorganic compounds room stored in organic compounds throughout chemosynthesis.

Photosynthesis: The light energy is converted right into chemical energy during photosynthesis.


Chemosynthesis: Chemosynthetic organisms are collectively called chemotrophs.

Photosynthesis: Photosynthetic organisms are jointly called phototrophs.

Pigments Involved

Chemosynthesis: No colors are connected in the chemosynthesis.

Photosynthesis: Chlorophyll, carotenoids, and phycobilins are the pigments affiliated in photosynthesis.

Plastids Involved 

Chemosynthesis: Plastids space not associated in chemosynthesis.

Photosynthesis: Chloroplasts are the plastids found in plants; the reaction of photosynthesis are concentrated in the cell.

Oxygen together a By-product

Chemosynthesis: Oxygen gas is not released as a by-product. 

Photosynthesis: Oxygen is released together the by-product throughout photosynthesis.

Contribution to complete Biospheric Energy

Chemosynthesis: Chemosynthesis has actually a lower contribution come the complete biospheric energy.

Photosynthesis: Photosynthesis has a greater contribution to the total biospheric energy.


Chemosynthesis: Chemoorganotrophs and chemolithotrophs space the two categories the chemotrophs.

Photosynthesis: Photoautotrophs and also photoheterotrophs space the 2 categories the phototrophs.


Chemosynthesis: Chemosynthesis is discovered in bacteria like Acidithiobacillus ferrooxidans, Nitrosomonas, Nitrobacter, sulfur-oxidizing proteobacteria, aquificaeles and also archaea favor methanogenic archaea.

Photosynthesis: Photosynthesis is uncovered in eco-friendly plants, cyanobacteria, algae and also Rhodobactor like bacteria.


Chemosynthesis and also photosynthesis space two varieties of primary productions found amongst organisms. Chemosynthesis and also photosynthesis fuel all the life forms on the earth. Both many chemosynthetic and also photosynthetic organisms use carbon dioxide and also water in stimulate to develop organic compounds as food. Chemosynthesis supplies the chemical energy stored in inorganic compounds in order to produce simple sugars like glucose. That is the major energy source of most of the animals found in hydrothermal vents in the deep sea, wherein the sunlight is can not to reach. In contrast, photosynthesis uses the light power of the sun in stimulate to produce glucose. Chemosynthesis is mostly uncovered in bacteria, which can either live independently on the seafloor or symbionts life inside pets like tube worms by replacing their guts. Land plants space the major producers of most food chains on earth. However, the key difference in between chemosynthesis and also photosynthesis is their energy source.

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Reference: 1. National Research board of directors (US) Committee top top Research methods in Biology. “Ecology and Ecosystems.” opportunities in Biology. U.S. National Library the Medicine, 01 Jan. 1989. Web. 03 Apr. 2017. 2. Nationwide Research the supervisory board (US) ocean Studies Board. “Achievements in biological Oceanography.” 50 year of ocean Discovery: nationwide Science structure 1950-2000. U.S. Nationwide Library of Medicine, 01 Jan. 1970. Web. 03 Apr. 2017. 3. Cooper, Geoffrey M. “Photosynthesis.” The Cell: A molecular Approach. 2nd edition. U.S. Nationwide Library the Medicine, 01 Jan. 1970. Web. 03 Apr. 2017.

Image Courtesy: 1. “Giant pipe worms next to vent” through Nasa – (Public Domain) via Commons Wikimedia 2. “318743” (Public Domain) via Pixabay