Table of Contents
What happens to NADP in Photophosphorylation?
In non-cyclic photophosphorylation the photolysis of water produces electrons that generate a proton motive force which is used to produce ATP, the electrons finally being used to reduce NADP+ to NADPH.
What happens to the hydrogen in NADPH when it becomes NADP?
Hydrogen ions are transported with the electrons along the chain of reactions. In photosystem I, the electrons are energized, and the energy is stored in molecules of NADP+. During these reactions, the NADP+ molecules are reduced by the addition of electrons. A hydrogen ion is added to NADP+ to form NADPH.
What does NADP+ turn into when it picks up electrons and hydrogen?
You should be familiar with the energy carrier molecules used during cellular respiration: NADH and FADH2. The lower energy form, NADP+, picks up a high energy electron and a proton and is converted to NADPH.
How is reduced NADP formed in the light dependent reaction?
In the photosystem II (PSII) reaction center, energy from sunlight is used to extract electrons from water. The electrons travel through the chloroplast electron transport chain to photosystem I (PSI), which reduces NADP+ to NADPH.
How is reduced NADP produced in the LDR?
To replace the lost electrons in PS2, photolysis occurs, producing H+ and OH- and electrons. The H+ and the excited electron from PS2 are taken up by NADP to form reduced NADP.
How does NADP plus become NADPH?
How does NADP+ turn into NADPH? NADPH is an energy molecule. NADP+ is an e- acceptor. It turns into NADPH by accepting both e- and H+ molecules.
What would happen if chloroplast ran out of NADP+?
What would you expect would happen if this chloroplast ran out of available NADP+? The organism would not be able to produce NADPH, but will be able to produce ATP.
Where does the electron acceptor molecules transfer electrons?
Explanation: Oxygen serves as the terminal electron acceptor for the electron transport chain. Electrons are donated by NADH molecules and passed through several different proteins to generate the proton gradient in the intermembrane space.
What is the role of NADP+?
NADP+ is a coenzyme that functions as a universal electron carrier, accepting electrons and hydrogen atoms to form NADPH, or nicotinamide adenine dinucleotide phosphate. NADP+ is created in anabolic reactions, or reaction that build large molecules from small molecules.
What happens when NADP is reduced?
For example, fatty acid synthesis is a reductive process that requires ATP and NADPH. Reduced NADP is necessary to produce triacylglycerols, phospholipids and steroids, such as cholesterol, bile acids and steroid hormones. Biosynthesis of some amino acids (e.g. glutamate and proline) is also dependent on NADPH.