water from photosynthesis

Question

which process in the photosynthesis produce water?

the light-dependent reaction or the light-independent reaction??

how is water being produced?

Update:

then why the equation of photosynthesis invovle water on the right hand side

6CO2 + 12 H2O ---> 6 C6H12O6 + 6 O2 + 6 H2O

Answer 1

Favorite Answer

photosynthesis DOES produce water

but since it takes in water as well

sometimes we ignore the water that photosynthesis produce

6CO2 + 12 H2O ---> 6 C6H12O6 + 6 O2 + 6 H2O

in light dependent stage

light energy splits H20 into H atoms and O2

in light independent stage

H atom combines with CO2 to form glucose as the first product

24H + 6CO2 ---> C6H12O6 + 6H20

therefore water is formed in light independent stage

2007-05-11 19:10:36 補充：

actually why we sometimes ignore the water that photosynthesis produce is because we assume that the photosynthetic water is used by the plant again in next photosynthesis

Answer 2

Photosynthesis DOES NOT produce water, it USES water.

In the light-dependent reaction, water is being 'split up' by the light energy absorbed by chlorophyll, to produce oxygen gas and hydrogen ions. Oxygen is relseased as a by-product of photosynthesis, and hydrogen ions are carried by coenzymes (NADP) into the light-independent reaction.