Photosythesis occurs

In the future such genetic engineering may result in improvements in the process of photosynthesis, but by the first decades of the 21st century, it had yet to demonstrate that it could dramatically increase crop yields. Eutrophication is often an indicator of agricultural runoff, which can raise phosphorus and nitrogen concentrations to very high levels.

Likewise, if large portions of the algal bloom die off at once, bacteria will start to consume oxygen in order to decompose the dead algae.

When an algal bloom appears, the concentration of toxins increases faster than the bacteria can break it down. Decarboxylation of malate during the day releases CO2 inside the leaves, thus allowing carbon fixation to 3-phosphoglycerate by RuBisCO. Even natural causes can trigger an algal bloom, such as a rainstorm followed by warm, sunny weather 1.

Phytoplankton are made up of single-celled algae and cyanobacteria. What happens during Photosynthesis. Consequently, the carbon dioxide that has been removed from the air to make carbohydrates in photosynthesis over millions of years is being returned at an incredibly rapid rate.

While algae are often called primitive plants, other terms, like protists, can be used 4. A series of metabolic pathways the Krebs cycle and others in the mitochondria result in the further breaking of chemical bonds and the liberation of ATP. However, since photosystem II is the first step of the Z-scheme, an external source of electrons is required to reduce its oxidized chlorophyll a molecules.

The overall equation for the light-independent reactions in green plants is [24]: Carbon Fixation and the Climate In addition to providing food and oxygen for nearly all life on Earth, phytoplankton help to regulate inorganic carbon carbon dioxide in the atmosphere The first process is the Light Dependent Process Light Reactionsrequires the direct energy of light to make energy carrier molecules that are used in the second process.

Photodissociation and Oxygen evolution The NADPH is the main reducing agent produced by chloroplasts, which then goes on to provide a source of energetic electrons in other cellular reactions. Plants that photosynthesized in the presence of water containing HO produced oxygen gas containing 18O; those that photosynthesized in the presence of normal water produced normal oxygen gas.

Photosynthesis is the process by which plants make their own food using carbon dioxide, water and sunlight. For example, in green plants, the action spectrum resembles the absorption spectrum for chlorophylls and carotenoids with absorption peaks in violet-blue and red light.

During fermentation, the pyruvic acid produced during glycolysis is converted to either ethanol or lactic acid.

Turbidity, or the presence of suspended particles in the water, affects the amount of light that reaches into the water 1. Chlorophyll a absorbs its energy from the Violet-Blue and Reddish orange-Red wavelengths, and little from the intermediate Green-Yellow-Orange wavelengths.

Many Prokaryotes have only one photosystem, Photosystem II so numbered because, while it was most likely the first to evolve, it was the second one discovered.

This melting process also fuels the oceanic convection, or circulation Phytoplankton are responsible for much of the dissolved oxygen found in surface waters The additional chlorophyll forms are accessory pigments, and are associated with different groups of plants and algae and play a role in their taxonomic confusion.

The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf. The most common cause of this event is lack of oxygen In its simplest form, this involves the membrane surrounding the cell itself.

The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. These electrons can create an electrical current.

Phycoerythrin reflects red light, and can be found in red algae and cyanobacteria. However, the extent to which temperature affects photosynthesis in algae and cyanobacteria is dependent on the species. These pigments are embedded in plants and algae in complexes called antenna proteins. The structure of the chloroplast and photosynthetic membranes Back to Top The thylakoid is the structural unit of photosynthesis.

Chlorophyll B is mainly found in land plants, aquatic plants and green algae 1. Some plants have evolved mechanisms to increase the CO2 concentration in the leaves under these conditions.


When nutrient levels rise, phytoplankton growth is no longer nutrient-limited and a bloom may occur There are 6 different chlorophylls that have been identified 1, The areas between grana are referred to as stroma. Photosynthesis occurs in plants, photosynthetic protist (algae), and some bacteria.

In plants and algae, it takes place within chloroplasts, whereas in bacteria it occurs on the plasma membrane and in the cytosol. The remainder of this discussion will refer to photosynthesis in chloroplasts of plants.

Jan 22,  · Photosynthesis is a two stage process in which the first stage is light dependent and occurs in the thylakoid membranes where photosystems exist. The products of the first stage are needed for the second stage to occur in the stroma of the choloplasts also known as the light independent stage.

Photosynthesis for Kids

Photosynthesis occurs in plants and in some algae. The process takes place in the chloroplasts, primarily in plant leaves.


Carbon dioxide enters the leaves through the stomates by diffusion, and water is transported to the leaves in the xylem. Answer is letter D which is “all eukaryotic cells”.

The cellular respiration occur in all eukaryotic cells has a metabolic reaction and processes that happens in the cells of an organism to change it into a biochemical enegergy unlike photosynthesis it only occurs in cells having chloroplast5/5(4).

Phytoplankton are single-celled algae and cyanobacteria found in water, classified together because they all contain chlorophyll, much like plants. Photosynthesis occurs in two stages commonly known as Light dependent Reactions and the Calvin Cycle.

Light dependent Reactions. Light dependent reactions occur in the thylakoid membrane of the chloroplasts and take place only when light is available. During these reactions light energy is converted to chemical energy.

Photosythesis occurs
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Photosynthesis for Kids