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 is the source of electrons for photosystem I?
Photosystem I receives electrons from plastocyanin or cytochrome c6 on the lumenal side of the thylakoid membrane and uses light energy to transfer them across the membrane to ferredoxin on the stromal side. It can also function in a cyclic electron transport pathway.
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 .
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 the main source of electrons for photosystem II?
water molecules Photosystem II obtains replacement electrons from water molecules, resulting in their split into hydrogen ions (H+) and oxygen atoms. The oxygen atoms combine to form molecular oxygen (O2), which is released into the atmosphere. The hydrogen ions are released into the lumen.
What are the different electron sources in photosynthesis and 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 |
Which is the source of electrons in the electron transport chain stage of respiration?
All of the electrons that enter the transport chain come from NADH and FADH 2start subscript, 2, end subscript molecules produced during earlier stages of cellular respiration: glycolysis, pyruvate oxidation, and the citric acid cycle.
What provides the source of electrons to the electron transport chain?
All of the electrons that enter the transport chain come from NADH and FADH 2start subscript, 2, end subscript molecules produced during earlier stages of cellular respiration: glycolysis, pyruvate oxidation, and the citric acid cycle.
How does the electron transport chain work in photosynthesis?
Electron transport helps establish a proton gradient that powers ATP production and also stores energy in the reduced coenzyme NADPH. This energy is used to power the Calvin Cycle to produce sugar and other carbohydrates.
Which of the following is a source of replacement electrons for photosystem II during photosynthesis?
In (a) photosystem II, the electron comes from the splitting of water, which releases oxygen as a waste product.
Where do the electrons come from in cellular respiration?
It occurs in mitochondria in both cellular respiration and photosynthesis. In the former, the electrons come from breaking down organic molecules, and energy is released. In the latter, the electrons enter the chain after being excited by light, and the energy released is used to build carbohydrates.
Where do electrons come from in cellular respiration?
It occurs in mitochondria in both cellular respiration and photosynthesis. In the former, the electrons come from breaking down organic molecules, and energy is released. In the latter, the electrons enter the chain after being excited by light, and the energy released is used to build carbohydrates.
What is the source of energy for electron transport in the mitochondria?
During electron transport, energy is used to pump hydrogen ions across the mitochondrial inner membrane, from the matrix into the intermembrane space. A chemiosmotic gradient causes hydrogen ions to flow back across the mitochondrial membrane into the matrix, through ATP synthase, producing ATP.
What is the source of electrons in respiration?
In cellular respiration, electrons from glucose move gradually through the electron transport chain towards oxygen, passing to lower and lower energy states and releasing energy at each step. The goal of cellular respiration is to capture this energy in the form of ATP.
Where does the electron transport chain take place in photosynthesis?
the thylakoid membrane In photosynthetic eukaryotes, the electron transport chain is found on the thylakoid membrane.
What is the direct source of electrons for the electron transport chain etc in photosynthesis and cellular respiration?
All of the electrons that enter the transport chain come from NADH and FADH 2start subscript, 2, end subscript molecules produced during earlier stages of cellular respiration: glycolysis, pyruvate oxidation, and the citric acid cycle.
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 glycolysis?
As in aerobic respiration, Glycolysis also delivers high-energy electrons taken from glucose to electron carriers.
What is the initial source of electrons in the electron transport chain in photosynthesis?
What is the initial source of electrons for the chloroplast electron transport chain? Water is the initial source. The reaction center contains a pair of chlorophyll a molecules with a special property.
Where does the first electron come from in photosynthesis?
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 the light-dependent?
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.