Phtosynthesis Projects

Although there are some differences between oxygenic photosynthesis in plants, algae, and cyanobacteria, the overall process is quite similar in these organisms.There are also many varieties of anoxygenic photosynthesis, used mostly by certain types of bacteria, which consume carbon dioxide but do not release oxygen.The bacteriorhodopsin changes its configuration in response to sunlight, acting as a proton pump. These pigments are embedded in plants and algae in complexes called antenna proteins.

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In plants, algae and cyanobacteria, long-term energy storage in the form of sugars is produced by a subsequent sequence of reactions called the Calvin cycle; some bacteria use different mechanisms, such as the reverse Krebs cycle, to achieve the same end.

In the Calvin cycle, atmospheric carbon dioxide is incorporated into already existing organic carbon compounds, such as ribulose bisphosphate (Ru BP).

During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide. Plants absorb light primarily using the pigment chlorophyll.

Most organisms that utilize oxygenic photosynthesis use visible light for the light-dependent reactions, although at least three use shortwave infrared or, more specifically, far-red radiation. The green part of the light spectrum is not absorbed but is reflected which is the reason that most plants have a green color.

In these light-dependent reactions, some energy is used to strip electrons from suitable substances, such as water, producing oxygen gas.

The hydrogen freed by the splitting of water is used in the creation of two further compounds that serve as short-term stores of energy, enabling its transfer to drive other reactions: these compounds are reduced nicotinamide adenine dinucleotide phosphate (NADPH) and adenosine triphosphate (ATP), the "energy currency" of cells.By continuing to use this site, you consent to the use of cookies.We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services.In plants, algae, and cyanobacteria, photosynthesis releases oxygen.This is called oxygenic photosynthesis and is by far the most common type of photosynthesis used by living organisms.To learn more or modify/prevent the use of cookies, see our Cookie Policy and Privacy Policy.Composite image showing the global distribution of photosynthesis, including both oceanic phytoplankton and terrestrial vegetation.Photosynthetic organisms are photoautotrophs, which means that they are able to synthesize food directly from carbon dioxide and water using energy from light.However, not all organisms use carbon dioxide as a source of carbon atoms to carry out photosynthesis; photoheterotrophs use organic compounds, rather than carbon dioxide, as a source of carbon.We use cookies to make interactions with our website easy and meaningful, to better understand the use of our services, and to tailor advertising.For further information, including about cookie settings, please read our Cookie Policy .

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