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KS3 biology Quiz on "PLANTS and PHOTOSYNTHESIS" …

Plants cells contain a number of structures that are involved in the process of photosynthesis:

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Photosynthesis Facts, Information & Worksheets For Kids

Photosynthesis is the process by which plants use the energy of light to produce carbohydrates and molecular oxygen (O2) from carbon dioxide (CO2) and water:

Diagram of a plant cell involved in production of glucose from photosynthesis

There are two major components of photosynthesis: the light cycle and the dark cycle. As implied by these names, the reactions in the light cycle require energy input from sunlight (or some artificial light source) to take place. The reactions in the dark cycle do not have to take place in the dark, but they can progress when sunlight is not present.

Photosynthesis For Kids | Cool Kid Facts

Other products ofphotosynthesis are formed by incorporating mineral elements into theprocess.

There was a time a very, very long time ago when there wasn’t much oxygen around so animals and humans couldn’t exist. Well what made it all happen? The plants of course! It was only because of photosynthesis that more and more oxygen was made which meant that animals and humans could develop. Think about it this way, without photosynthesis we wouldn’t even be around.

No chemical process is more important to life on than photosynthesis the series of chemical reactions that allow plants to harvest sunlight and create carbohydrate molecules. Without photosynthesis, not only would there be no plants, the planet could not sustain life of any kind. In plants, photosynthesis occurs in the thykaloid membrane system of chloroplasts. Many of the enzymes that allow photosynthesis to occur are transmembrane proteins embedded in the thykaloid membranes. What then is the chemistry involved?

This tutorial introduces photosynthesis

The most basic summary of the photosynthesis process can be shown with a net chemical equation

While all this is going on, the process is called photosynthesis, and then oxygen is made. But the plant doesn’t need all that oxygen so off it goes into the air and lucky for us, we can then breathe properly and stay alive.

Photosynthesis is the first stage of energy flow through an ecosystem. You and all other animals on earth rely on the energy that plants store for life. But animals aren’t the only organisms that burn energy. Plants burn energy as they grow, too. In both plants and animals, the process of — which releases stored energy for use — occurs in the mitochondria inside each cell.

Now that you know what photosynthesis is, hopefully you understand the importance of looking after our precious and mighty clever plants!
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  • Photosynthesis Guide | Our House Plants

    The chloroplast contains thykaloids, disks in which the light reactions of photosynthesis take place.

  • Photosynthesis PDF | Photosynthesis | Photochemistry

    Dark reactions: Those reactions in the photosynthesis process that can occur in the absence of sunlight.

  • 15/01/2018 · C3 and C4 photosynthesis ..

    Light reactions: Those reactions in the photosynthesis process that can occur only in the presence of sunlight.

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Documents Similar To Photosynthesis PDF.

This is an example of an oxidation reduction reaction, and it shows that the light cycle is the stage of photosynthesis when water breaks up. The amount of energy required to make this reaction proceed is greater than what can be provided by a single photon of visible light. Therefore, there must be at least two ways that plants harvest light energy in photosynthesis. These two systems are referred to as photosystem I (PSI) and photosystem II (PSII), although the numbers associated with these names do not imply which one happens "first."

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The carbon dioxide needed for this step enters through pores in the photosynthetic leaf (called stromata). Plants close these pores during hot, dry times of the day (to prevent water loss) so the details of carbon fixing vary for plants from different climates. In hot climates, where stomata are closed for a higher percentage of time, the trapping of carbon dioxide has to be more efficient than in cooler climates. This biochemical difference in photosynthesis helps explain why plants from one climate do not grow as well in warmer (or cooler) places.

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The figure illustrates how closely photosynthesis and respiration are linked. As you can see, thanks to these two life-sustaining processes, plants and animals depend on each other to survive.

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The symbol is used to depict the energy input from light (in the case of most plants, sunlight). This chemical equation, however, is a dramatic simplification of the very complicated series of chemical reactions that photo-synthesis involves. It also implies that the only product is glucose , C6H12O6 ( ), which is also a simplification.

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Photosynthesis is central to all life on the planet and has been for many thousands of years. As a result, there are numerous variations in the way it occurs in different cells. The efficient collection of carbon dioxide mentioned earlier is one example of variation in photosynthesis. Other differences occur when the process takes place in bacteria rather than plants. Nonetheless, the description provided here outlines the basic concepts that would be noted in all photosynthesis. These differences pose the research questions that continue to challenge scientists today.

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