Which molecule is the source of electrons for the light reactions quizlet?
In light reactions, water is split, providing a source of electrons and giving off O2 as a biproduct. H+ electrons from water reduce NADP+to NADPH.
What molecule is the source of electrons into the photosystems of the light reactions?
chlorophyll A photon of light energy travels until it reaches a molecule of chlorophyll. The photon causes an electron in the chlorophyll to become “excited.” The energy given to the electron allows it to break free from an atom of the chlorophyll molecule. Chlorophyll is therefore said to “donate” an electron (Figure 5.12).
What molecule provides a source of electrons and protons during the light reactions?
The light reactions are the steps of photosynthesis that convert solar energy to chemical energy. Water is split, providing a source of electrons and protons (hydrogen ions, H+) and giving off O2 as a by-product.
Which is the main source of energy in light reaction?
In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water.
What molecule is the source of the electrons in the electron transport chain quizlet?
The role of NADH and FADH2 is to donate electrons to the electron transport chain. They both donate electrons by providing an hydrogen molecule to the oxygen molecule to create water during the electron transport chain. NADH is a product of both the glycolysis and Kreb cycles.
What is the source of electrons for the chloroplast electron transport chain?
What is the initial source of electrons for the chloroplast electron transport chain? The reaction center contains a pair of chlorophyll a molecules with a special property. Those two chlorophylls can undergo oxidation upon excitation; they can actually give up an electron in a process called a photoact.
Where do the electrons in photosynthesis come from?
What is the source of electrons in photosynthesis? In photosynthesis water is the source of electrons and their final destination is NADP+ to make NADPH.
Where do electrons come from in light-dependent reactions?
The light-dependent reactions involve two photosytems (II and I) and an electron transport chain that are all embedded in the thylakoid membrane. Light that is harvested from PSII causes an excited electron of the chlorophyll a special pair to be passed down an electron transport chain (Pq, Cyt, and Pc) to PSI.
Where do the electrons come from in photosynthesis?
In (a) photosystem II, the electron comes from the splitting of water, which releases oxygen as a waste product. In (b) photosystem I, the electron comes from the chloroplast electron transport chain discussed below.
Where do electrons get their energy in the light reactions?
Pigments within the light-harvesting complexes absorb light and pass energy to a special pair of chlorophyll a molecules in the reaction center. The absorbed energy cause an electron from the chlorophyll a to be passed to a primary electron acceptor.
What is the source of energy for light-independent reactions?
The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.
What molecule is the source of the electrons in the electron transport chain group of answer choices?
The role of NADH and FADH2 is to donate electrons to the electron transport chain. They both donate electrons by providing an hydrogen molecule to the oxygen molecule to create water during the electron transport chain. NADH is a product of both the glycolysis and Kreb cycles.
What is the source of the electrons in photosynthesis?
In photosynthesis, water is the source of electrons and their final destination is NADP+ to make NADPH. In mitochondria, NADH/FADH2 are electron sources and H2O is their final destination.
Which molecules are produced during the light reactions of photosynthesis?
The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH.
What is the source of electrons in photosynthesis?
In photosynthesis, water is the source of electrons and their final destination is NADP+ to make NADPH. In mitochondria, NADH/FADH2 are electron sources and H2O is their final destination.
What is the source of electrons in plants?
Answer and Explanation: In the electron transport process of photosynthesis, water is used as the electron source.
What molecules enter the light independent reaction?
The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose.
What two molecules are produced by the light reactions and used to power the Calvin cycle?
This illustration shows that ATP and NADPH produced in the light reactions are used in the Calvin cycle to make sugar.
What is NADH and FADH?
NADH: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain. FADH2: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain.
What is the source of electrons?
Finally, the electron source can be either organic (organotrophs), inorganic (lithotrophs), or water (aquatrophs).
What 2 molecules are produced during the light reactions and used during the Calvin cycle?
This illustration shows that ATP and NADPH produced in the light reactions are used in the Calvin cycle to make sugar.
Which molecules are produced during the light reactions of photosynthesis quizlet?
The light reactions produce chemical energy in the form of NADPH and ATP.
Where do electrons come from in light dependent reactions?
The light-dependent reactions begin in photosystem II. In PSII, energy from sunlight is used to split water, which releases two electrons, two hydrogen atoms, and one oxygen atom.
Which molecule is produced during the light reactions?
The light-dependent reaction is a photochemical reaction taking place in the thylakoid membranes of chloroplasts, where light energy is transformed into adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH).
What is the source of electrons in cellular respiration?
Comparison chart
| Cellular Respiration | |
|---|---|
| Occurs in which organelle? | Mitochondria Glycolysis (cytoplasm) |
| Final electron receptor | O2 (Oxygen gas) |
| Occurs in which organisms? | Occurs in all living organisms (plants and animals). |
| Electron source | Glucose, NADH + , FADH2 |
What is ADP and NADP?
ADP – Adenosine diphosphate. NaDP- Nicotinamide adenine dinucleotide phosphate.
What is an electron beam source?
Electron beam deposition is a method of using electron beams generated from an electron source in a vacuum to irradiate an evaporant material, and heating and evaporating it so that the evaporated material forms a thin film on a substance, such as a substrate or a lens.
What is the source of ATP and NADPH?
ATP and NADPH produced by the light-dependent reactions of the photosystems are used by the Calvin cycle in the stroma of the chloroplast. Molecules of CO2 gas are fixed into molecules of 3-phosphoglycerate in a reaction catalyzed by the enzyme Rubisco.
What is ADP molecule?
Adenosine diphosphate (ADP) is a molecule that is involved in transferring and providing cells with energy. Adenosine triphosphate (ATP) is the main energy molecule cells use to power work. Energy is stored in the bonds between the phosphate molecules.
How are electrons produced?
Electrons can be created through beta decay of radioactive isotopes and in high-energy collisions, for instance when cosmic rays enter the atmosphere. The antiparticle of the electron is called the positron; it is identical to the electron except that it carries electrical charge of the opposite sign.