Where does the oxygen released during photosynthesis come from?

Question

a. CO2
b. ATP
c. oxygen
d. water
e. none of the above ... if its none of these can you explain to me the right answer??

Answer 1

The overall reaction is something like this:

6 CO2 + 6 H20 + energy <-> C6H12O6 + 6 O2

So you're getting 12 O from carbon dioxide and 6 O from water. The MOST accurate answer would be (a and d)... or since that's not an option, I would probably go with (e).

Otherwise, (a) is most correct, as it accounts for two-thirds of the Os.

Answer 2

Oxygen from photosynthesis is a byproduct made after dehydration synthesis occurs. Its released from the thylakoid and diffuses through the stomata (pores) into the environment. So basically it comes from the thylakoid during the light reactions.

Answer 3

D. Water.

This was demonstrated by experimentation with heavy isotopes of oxygen present in the water, which were later found in the "heavy" oxygen gas released. The other experiment was performed (heavy oxygen in the carbon dioxide) and found that the oxygen released was "light."

Answer 4

Photosynthesis (photo=light, synthesis=putting together), generally, is the synthesis of glucose from sunlight, carbon dioxide and water, with oxygen as a waste product.

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 are used for synthetic reactions in photoautotrophs.

Answer 5

water. The energy used hydrolyzes water into oxygen and protons, and the protons are used to reduce the carbon dioxide molecules in the synthesis of carbohydrates.

Answer 6

6H2O + 6CO2 ----------> C6H12O6+ 6O2
Most of us don't speak chemicalese, so the above chemical equation translates as:

six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen

Answer 7

oxygen released during photosynthesis come from (a.CO2).

Answer 8

d ) water.