Table of Contents
- 1 What happens to hydrogen ions in photolysis?
- 2 What happens to the H+ ions that have come from the splitting of water?
- 3 What happens during photolysis of water?
- 4 Does photolysis of water occur in photosynthesis?
- 5 What occurs as H +ions pass through ATP synthase in the thylakoid membrane and what is this process called?
- 6 Why are 12 molecules of water required for the light reactions?
- 7 In which step photolysis of water occurs during photosynthesis?
- 8 Where does photolysis of water takes place in chloroplast?
What happens to hydrogen ions in photolysis?
In this process of photolysis (“splitting by light”), H2O molecules are broken into hydrogen ions, electrons, and oxygen atoms. The electrons replace those originally lost from chlorophyll. The oxygen atoms, however, form oxygen gas, which is a waste product of photosynthesis.
What happens to the H+ ions that have come from the splitting of water?
Oxygen and hydrogen ions are also formed from the splitting of water. To replace the electron in the reaction center, a molecule of water is split. This splitting releases an electron and results in the formation of oxygen (O2) and hydrogen ions (H+) in the thylakoid space.
What happens to the hydrogen in water during photosynthesis?
In the first reaction, energy is used to split water molecules into hydrogen and oxygen. The hydrogen is needed for the second stage of reactions and the oxygen is released by the plant as a waste product. In the reactions of the second stage, the hydrogen is combined with carbon dioxide to make glucose.
What happens during photolysis of water?
This part of photosynthesis occurs in the granum of a chloroplast where light is absorbed by chlorophyll; a type of photosynthetic pigment that converts the light to chemical energy. This reacts with water (H2O) and splits the oxygen and hydrogen molecules apart.
Does photolysis of water occur in photosynthesis?
In oxygenic photosynthesis, water (H2O) serves as a substrate for photolysis resulting in the generation of diatomic oxygen (O2). This is the process which returns oxygen to Earth’s atmosphere. Photolysis of water occurs in the thylakoids of cyanobacteria and the chloroplasts of green algae and plants.
Which ions are produced from water during photolysis?
Protons or hydrogen ions produced by photolysis of water accumulate in the lumen of thylakoids.
What occurs as H +ions pass through ATP synthase in the thylakoid membrane and what is this process called?
As the thylakoid space fills up H+ ions, the inside of the membrane becomes positively charged relative to the outside of the membrane. H+ ions pass back across the thylakoid membrane through ATP synthase. As the ions pass through, the Atp synthase molecule rotates and the energy produced is used to convert ADP To ATP.
Why are 12 molecules of water required for the light reactions?
Why are 12 molecules of water required for the light reactions? –Two molecules of water split to form1 molecule of oxygen and the respective number of electrons and hydrogen ions are also formed . –Now for producing 12 molecules of NADPH , total 12 molecules of water are required.
Where do the H+ ions come from in photosynthesis?
The water molecules provide the H+ ions and electrons that are used in the light-dependent reactions. Energized electrons have two functions. They provide energy for H+ ion transport, and they are added to NADP+ to form NADPH. The flow of H+ ions through ATP synthase makes ATP.
In which step photolysis of water occurs during photosynthesis?
light phase
Photolysis of water takes place in the light phase. Light phase is a part of photosynthesis during which oxygen is released.
Where does photolysis of water takes place in chloroplast?
A. Calvin cycle. B.
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