For photosynthesis to continue, water is required?

Question

to supply thylakoid with OH (-)


for oxidation of pigment molecules


to supply thylakoid with O2


for reduction of pigment molecules

Answer 1

Reduction of pigment molecules ... because:

-- Reduction means a molecule gained electrons.
-- H2O is split apart into oxygen which leaves the plant, H+ which are used to spin the "ATP maker" protein, and electrons which are given to the chlorophyll molecules in Photosystem II.

Answer 2

for reduction of pigment molecules. a chlorophyll electron is excited by a photon, and it is transfered to an electron transport protein in the thylakoid membrane. To replace that lost electron, water is oxidized into H+ and O2.

Answer 3

Photosynthesis is C6H12O6+ O2 -> H2O + CO2
so water is being produced, you shouldnt need to add water, respiration is the opposite, that needs water.