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.
What is the main purpose of the electron transport chain in photosynthesis?
Photosynthetic electron transport
converts free and abundant solar energy into reducing power and chemical energy for producing biomass and biofuels through transferring electrons sequentially from H
2
O
through Photosystem II and then Photosystem I to NADP
+
in chloroplasts of higher plants and photosynthetic algae or in …
What is the function of the electron transport chain?
The electron transport chain is a series of four protein complexes that
couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation
. It occurs in mitochondria in both cellular respiration and photosynthesis.
How does electron transport chain relate to photosynthesis?
ATP is created when hydrogen ions are pumped into the inner space (lumen) of the thylakoid. … 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.
What is the electron transport chain summary?
The electron transport chain is
a cluster of proteins that transfer electrons through a membrane within mitochondria to form a gradient of protons
that drives the creation of adenosine triphosphate (ATP). ATP is used by the cell as the energy for metabolic processes for cellular functions.
What are the major functions of the electron transport chain in living plant cells?
The ETC reactions are a highly efficient
way to produce and store energy for the cell to use in its movement, reproduction and survival
. When one of the series of reactions is blocked, the ETC no longer functions, and cells that rely on it die.
What is the electron transport chain also known as?
The respiratory chain
, otherwise known as the electron transport chain, resides in the mitochondria. … The chain consists of a series of electron carriers which can accept and then donate electrons, while the resulting production of energy is used to stimulate the formation of ATP via oxidative phosphorylation.
What are the steps in the electron transport chain?
- Step 1: Generating a Proton Motive Force.
- Step Two: ATP Synthesis via Chemiosmosis.
- Step Three: Reduction of Oxygen.
- Summary: Oxidative Phosphorylation.
What are the components of electron transport chain?
The electron transport chain is also called the Cytochrome oxidase system or as the Respiratory chain. The components of the chain include
FMN, Fe–S centers, coenzyme Q, and a series of cytochromes (b, c1, c, and aa3)
.
What are the electron carriers in photosynthesis and cellular respiration?
There are two types of electron carriers that are particularly important in cellular respiration:
NAD +start superscript, plus, end superscript (nicotinamide adenine dinucleotide, shown below)
and FAD (flavin adenine dinucleotide). Chemical structures of NAD+ and NADH.
Where is the electron transport chain associated with Photophosphorylation located in plant cells?
Diagram of non-cyclic photophosphorylation. The photosystems and electron transport chain components are
embedded in the thylakoid membrane
. When light is absorbed by one of the pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction center.
How many electron transport chains are there in photosynthesis?
In photosynthesis, there are
two electron transport chains
.
What are the major events of the electron transport chain?
The events of the electron transport chain involve
NADH and FADH, which act as electron transporters as they flow through the inner membrane space
. In complex I, electrons are passed from NADH to the electron transport chain, where they flow through the remaining complexes. NADH is oxidized to NAD in this process.
Does the electron transport chain require oxygen?
Explanation:
Oxygen is the final electron acceptor in the electron transport chain
, which allows for oxidative phosphorylation. Without oxygen, the electrons will be backed up, eventually causing the electron transport chain to halt.
Where is the electron transport chain located in prokaryotes?
They are arranged in four complexes. In eukaryotes, the electron transport chain is located in the inner mitochondrial membrane. In prokaryotes, it is located
within the plasma membrane
. Electrons move through the electron transport chain from a higher to lower energy state.
Why are the components of the electron transport chain embedded?
Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
To generate and maintain the proton gradient essential for ATP production
.
