A short description of how photosythesis processes in plants

The hydrogen ions released contribute to the transmembrane chemiosmotic potential that leads to ATP synthesis.


What have you learned so far. Carbon dioxide cannot pass through the protective waxy layer covering the leaf cuticlebut it can enter the leaf through the stoma the singular of stomataflanked by two guard cells.

An illustration of the photosynthesis process The leaves of a plant act as the primary site where the entire process occurs. Water from the roots is brought to the leaf by the vascular tissues called xylem, while the carbohydrates made by the leaf are distributed to the rest of the plant by the vascular tissue called phloem.

Photosynthesis Process for Kids Simplified for Easy Understanding

Two water molecules are oxidized by four successive charge-separation reactions by photosystem II to yield a molecule of diatomic oxygen and four hydrogen ions; the electrons yielded are transferred to a redox-active tyrosine residue that then reduces the oxidized chlorophyll a called P that serves as the primary light-driven electron donor in the photosystem II reaction center.

Plastoquinone is the mobile carrier that transports the electrons from the reaction center of PSII to the Cytochrome b6f Complex as shown in the diagram above.

The chlorophyll molecules of PSI absorb light with a peak wavelength of nm and are called P molecules. Likewise, oxygen produced during photosynthesis can only pass out of the leaf through the opened stomata.

The simple carbon sugars produced by photosynthesis are then used in the forming of other organic compounds, such as the building material cellulosethe precursors for lipid and amino acid biosynthesis, or as a fuel in cellular respiration.

Test Your Knowledge 1. C4 carbon fixation Plants that use the C4 carbon fixation process chemically fix carbon dioxide in the cells of the mesophyll by adding it to the three-carbon molecule phosphoenolpyruvate PEPa reaction catalyzed by an enzyme called PEP carboxylasecreating the four-carbon organic acid oxaloacetic acid.

Check new design of our homepage. Light dependent Reactions Light dependent reactions occur in the thylakoid membrane of the chloroplasts and take place only when light is available. Here is the process in greater detail: Carbon dioxide, water and energy are the products formed during those reactions.

At night, however, things are different as only carbon dioxide is released in the atmosphere. The word photosynthesis can be separated to make two smaller words: In fact any food chain traced back to its original source will always begin with a plant.

Most 5 out of 6 molecules of the glyceraldehyde 3-phosphate produced is used to regenerate ribulose 1,5-bisphosphate so the process can continue.

Photosynthesis for Kids

Most plants are able to make their own food whenever they need it. The electron is then passed along a chain of electron acceptors to which it transfers some of its energy. Photosynthesis is usually viewed as a two-step process.

The process by which green plants, algae, and certain forms of bacteria make carbohydrates from carbon dioxide and water in the presence of chlorophyll, using light as energy.


Photosynthesis normally releases oxygen as a byproduct. Plants need food but they do not have to wait on people or animals to provide for them.

Short Paragraph on Photosynthesis

Most plants are able to make their own food whenever they need it. This is done using light and the process is called photosynthesis.

Photosynthesis is the process by which plants make their own food.

Photosynthesis for Kids

Photosynthesis definition is - synthesis of chemical compounds with the aid of radiant energy and especially light; especially: formation of carbohydrates from carbon dioxide and a source of hydrogen (such as water) in the chlorophyll-containing cells (as of green plants) exposed to light.

In plants, photosynthesis only occurs in the presence of light, but respiration occurs day in and day out. As the two processes are carried out simultaneously during the daytime, the amount of oxygen produced easily overshadows the amount of carbon dioxide.

How does photosynthesis work? Follow our simple guide for students to learn more about the process of photosynthesis, where plants use energy from the sun to make their own food.

Learn the mystery behind the photosynthesis formula, and why other life forms are dependent on it for their survival. Nov 26,  · Photosynthesis is the process that plants use to combine light, water, and carbon dioxide to make glucose for energy and release oxygen.

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A short description of how photosythesis processes in plants
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How Does Photosynthesis Work? A Simple Guide