"One of the first clues to the mechanism of photosynthesis came from the discovery that the oxygen given off by plants through their stomata is derived from water and not from carbon dioxide." (Biology, Seventh Edition; Campbell, Reece. Chapter 10: Photosynthesis, page 184) It comes from the water
The reactants in photosynthesis are carbon dioxide (CO2) and water (H2O). Both contain oxygen, but from which compound does the O2 that we breathe come from? The assumption some time ago was that the oxygen in carbon dioxide eventually formed atmospheric oxygen. However, an experiment in the 1950s using a radioactive tracer (18O) followed the path of O2 back to H2O and not CO2.
The special chlorophyll a molecules of Photosystem II holds a water molecule so that a few photons of light will strike the electron bonds holding the hydrogen atoms to the Oxygen atom. When that happens, the water molecule releases its hydrogen atoms and they go to the next step where they are combined with Carbon dioxide for further processing. The Oxygen is released and combines with another Oxygen molecule.
the splitting of water in the light dependent reactions of photosynthesis.
The splitting of water.
cellular respiration chemical substance
CO2
It is produced from water. Water is broken down by photolysis to get electrons.
O2
food ; it is glucose and oxygen is released by plants during photosynthesis
No, oxygen is released in photosynthesis; Carbon dioxide is released in cellular respiration. Here is the formula for both C6H12O6(sugar)+ O2(oxygen)→ CO2(carbon dioxide)+ H2O + Energy - respiration CO2 + H2O + Energy(light) → C6H12O6 + O2 - photosynthesis As you can see they are opposites.
one o2 molecule
During photosynthesis O2 is released by the photolysis of water whereas in respiration O2 is consumed in the breakdown of substrate(reserve food).In simple words , Photosynthesis release O2 while respiration requires O2.
CO2 is taken in by the plants from the atmosphere and O2 is released during photosynthesis.
It is about H2O liquid. It releases the o2 gas.
Oxygen formed during photosynthesis is the gas O2.
Oxygen (O2) is released back into the air after photosynthesis occurs.
The chemicals producted during photosynthesis are oxygen, which is released as waste in the light dependent reaction, and glucose released in the Calvin Cycle
It is produced from water. Water is broken down by photolysis to get electrons.
Diatomic Oxygen - O2.
O2
O2 is the unused byproduct of photosynthesis, that you use during cellular respiration.
Photosynthesis produces O2 and Glucose which the plant equivalent of human defecation.Photosynthesis is the conversion of sunlight into ATP. ATP is used and burned inside the plan. What's is left is the unusable parts of the process which is converted to O2 and Glucose and released from the plant. We in turn breath in the O2 and exchange it for CO2, which the plant need for photosynthesis.
food ; it is glucose and oxygen is released by plants during photosynthesis