The oxygen released in photosynthesis comes from what?

Answer 1

It comes from water and CO2.

Answer 2

The oxygen is the last product(by product ) of the Krebs Cycle, which is a part of the Photosynthesis process. When all the Water molecules break bonds, energy is created as well as Oxygen. THis is then released into the atmosphere

* pls pick as best answer

Answer 3

Comes from the reaction between water and carbon dioxide with the presence of light and chlorophyll...actually this produces glucose AND oxygen

Answer 4

Yeah, what Michael says...if you want to think of it in non-scientific terms, the oxygen is a by-product of their "breathing." so to speak. Just like we breathe in air, extract oxygen for our needs and exhale carbon dioxide as a byproduct of our metabolism, plants do the opposite. They take in air, use the carbon dioxide, and give off oxygen as a byproduct of their metabolism....uh, Michael did a better job than I did.

Answer 5

put this equation in mind:
6 CO2+6 H2O--->1 C6H12O6+6 O2
6 molecules of carbon and 6 molecules of water react to make 1 molecule of glucose and 6 molecule of Oxygen Gas.
so it come from a reaction that plants make to make energy, a by product, the main product is glucose.

Answer 6

It comes from the water and carbon dioxide that a plant uses as raw materials.

Answer 7

Photosynthesis uses the energy of light to make the sugar, glucose. A simple general equation for photosynthesis follows.

6 CO2 + 12 H2O + photons → C6H12O6 + 6 O2 + 6 H2O
carbon dioxide + water + light energy → glucose + oxygen + water
Photosynthesis occurs in two stages. In the first phase light-dependent reactions or photosynthetic reactions (also called the Light reactions) capture the energy of light and use it to make high-energy molecules. During the second phase, the light-independent reactions (also called the Calvin-Benson Cycle, and formerly known as the Dark Reactions) use the high-energy molecules to capture carbon dioxide (CO2) and make the precursors of glucose.

In the light-dependent reactions one molecule of the pigment chlorophyll absorbs one photon and loses one electron. This electron excites pheophytin allowing the start of a flow of electrons down an electron transport chain that leads to the ultimate reduction of NADP into NADPH. In addition, it serves to create a proton gradient across the chloroplast membrane; its dissipation is used by ATP Synthase for the concomitant synthesis of ATP. The chlorophyll molecule regains the lost electron by taking one from a water molecule through a process called photolysis, that releases oxygen gas as a waste product.

In the Light-independent or dark reactions the enzyme RuBisCO captures CO2 from the atmosphere and in a process that requires the newly formed NADPH, called the Calvin-Benson cycle releases three-carbon sugars which are later combined to form glucose.

Photosynthesis may simply be defined as the conversion of light energy into chemical energy by living organisms. It is affected by its surroundings and the rate of photosynthesis is affected by the concentration of carbon dioxide, light intensity and the temperature.


IN PLANTS
Most plants are photoautotrophs, which means that they are able to synthesize food directly from inorganic compounds using light energy - for example from the sun, instead of eating other organisms or relying on nutrients derived from them. This is distinct from chemoautotrophs that do not depend on light energy, but use energy from inorganic compounds.

The energy for photosynthesis ultimately comes from absorbed photons and involves a reducing agent, which is water in the case of plants, releasing oxygen as a waste product. The light energy is converted to chemical energy (known as light-dependent reactions), in the form of ATP and NADPH, which is used for synthetic reactions in photoautotrophs. Most notably plants use the chemical energy to fix carbon dioxide into carbohydrates and other organic compounds through light-independent reactions. The overall equation for carbon fixation (sometimes referred to as carbon reduction) in green plants is

n CO2 + 2n H2O + ATP + NADPH → (CH2O)n + n H2O + n O2,
Where n is defined according to the structure of the resulting carbohydrate.
More specifically, carbon fixation produces an intermediate product, which is then converted to the final hexose carbohydrate products. These carbohydrate products are then variously used to form other organic compounds, such as the building material cellulose, as precursors for lipid and amino acid biosynthesis or as a fuel in cellular respiration. The latter not only occurs in plants, but also in animals when the energy from plants get passed through a food chain. Organisms dependent on photosynthetic and chemosynthetic organisms are called heterotrophs. In general outline, cellular respiration is the opposite of photosynthesis: glucose and other compounds are oxidised to produce carbon dioxide, water, and chemical energy. However, both processes actually take place through a different sequence of reactions and in different cellular compartments.

Plants absorb light primarily using the pigment chlorophyll, which is the reason that most plants have a green color. The function of chlorophyll is often supported by other accessory pigments such as carotenes and xanthophylls. Both chlorophyll and accessory pigments are contained in organelles (compartments within the cell) called chloroplasts. Although all cells in the green parts of a plant have chloroplasts, most of the energy is captured in the leaves. The cells in the interior tissues of a leaf, called the mesophyll, contain about half a million chloroplasts for every square millimeter of leaf. The surface of the leaf is uniformly coated with a water-resistant, waxy cuticle, that protects the leaf from excessive evaporation of water and decreases the absorption of ultraviolet or blue light to reduce heating. The transparent epidermis layer allows light to pass through to the palisade mesophyll cells where most of the photosynthesis takes place.

Answer 8

carbon dioxide and water (loosely stated) the brief equation is 6CO2 + H2O--(+UV light energy)--> C6H12O6(glucose) + 6O2

Answer 9

it comes from water sucked from roots

Answer 10

glucose