Question

Green plants produce their own food during photosynthesis. which of these statements about photosynthesis is true?

Answer 1

Answer:

B.

Explanation:

Water is one of the  reactants in photosynthesis. It is split into electrons, oxygen, and Hydrogen ions in first reaction of photosynthesis called photolysis of water. Therefore water is not a product.

Carbondioxide is another reactant  of photosynthesis that is reduced in the light independent stage of photsynthesis by H+ from photolysis to give Glucose.This reduction takes place in the Calvin cycle, in the presence of enzyme rubisco and substrate ribulose bisphosphate, The product is 2 molecules of 3C-glycerate phosphate, which later oxidized with hydrolysis of ATP, to form 2-Triose phosphate. The latter is converted to  glucose, Amino Acids, or fatty acids.

The Pigments for trapping energy in sunlight in the leaf chloroplast is called chlorophyll.It contains photosystems I and II. It is excited with the impact  of sunlight absorbed by the photo systems  I and II, and the electron is pick up by electron acceptors.  The electron is transferred  in cascade of reactions  which ends with  the  primary pigments of photosystem I absorbing electron from photosystem II. The primary pigment replaced the lost electron with electron from photolysis of water above.

Oxygen is the by-product of photosyntheis, it is produced when water is split in Photolysis of water.Oxygen is a by-product because it is not needed in subsequent stages of photosynthesis to  give the end products.it is given off  for cellular respiration in mammals.Therefore this is the correct answer.

Answer 2

Water is one product of photosynthesis