What transfers electrons in photosynthesis?
From photosystem II, electrons are carried by plastocyanin (a peripheral membrane protein) to photosystem I, where the absorption of additional photons again generates high-energy electrons. The enzyme NADP reductase then transfers electrons from ferrodoxin to NADP+, generating NADPH.
What substances are used during the process of photosynthesis?
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
What are the products of the electron transport chain in photosynthesis?
Electron carrier molecules are arranged in electron transport chains that produce ATP and NADPH, which temporarily store chemical energy. The light reactions capture energy from sunlight, which they change to chemical energy that is stored in molecules of NADPH and ATP.
What are the four substances involved in photosynthesis?
The four substances recycled during photosynthesis and respiration are carbon dioxide, water, oxygen and glucose.
What is electron donor in photosynthesis?
In oxygenic photosynthesis, H2O serves as the electron donor to replace the reaction center electron, and oxygen is formed as a byproduct. In anoxygenic photosynthesis, other reduced molecules like H2S or thiosulfate may be used as the electron donor; as such, oxygen is not formed as a byproduct.
What happens to electrons in photosynthesis?
The light reactions of photosynthesis use energy from photons to generate high-energy electrons (Figure 19.2). These electrons are used directly to reduce NADP+ to NADPH and are used indirectly through an electron-transport chain to generate a proton-motive force across a membrane.
What is the main byproduct of photosynthesis?
Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration.
What are the products of the electron transport?
The end products of the electron transport chain are water and ATP. A number of intermediate compounds of the citric acid cycle can be diverted into the anabolism of other biochemical molecules, such as nonessential amino acids, sugars, and lipids.
What is the main product in photosynthesis?
glucose
The products of photosynthesis are glucose and oxygen. Although the hydrogen atoms from the water molecules are used in the photosynthesis reactions, the oxygen molecules are released as oxygen gas (O2). (This is good news for organisms like humans and plants that use oxygen to carry out cellular respiration!)
What 2 chemicals are produced by photosynthesis?
The products of photosynthesis are glucose and oxygen. Although the hydrogen atoms from the water molecules are used in the photosynthesis reactions, the oxygen molecules are released as oxygen gas (O2).
What 2 chemicals are required for photosynthesis?
What is photosynthesis?
- Photosynthesis is a chemical reaction that takes place inside a plant, producing food for the plant to survive.
- Carbon dioxide, water and light are all needed for photosynthesis to take place.
- Photosynthesis happens in the leaves of a plant.
How does the electron transport chain work in photosynthesis?
The Electron Transport Chain. While at photosystem II and I, the electrons gather energy from sunlight. How do they do that? Chlorophyll, which is present in the photosystems, soaks up light energy. The energized electrons are then used to make NADPH. The electron transport chain is a series of molecules that accept or donate electrons easily.
How does ATP move down the electron transport chain?
By moving through the protein they give it power, like water moving through a dam. When hydrogen ions move through the protein and down the electron transport chain, ATP is created. This is how plants turn to sunlight into chemical energy that they can use.
How is NADPH used in the electron transport chain?
Chlorophyll, which is present in the photosystems, soaks up light energy. The energized electrons are then used to make NADPH. The electron transport chain is a series of molecules that accept or donate electrons easily. By moving step-by-step through these, electrons are moved in a specific direction across a membrane.
How are hydrogen ions transported down the electron transport chain?
They escape the thylakoid through a membrane protein called ATP synthase. By moving through the protein they give it power, like water moving through a dam. When hydrogen ions move through the protein and down the electron transport chain, ATP is created. This is how plants turn to sunlight into chemical energy that they can use.