What does the electron transport system do?

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What does the electron transport system do?

In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient. In chemiosmosis, the energy stored in the gradient is used to make ATP.

What is considered part of the electron transport system?


Term Which are considered part of the electron transport system? Definition 1. Electron carriers 2. H+ pumps 3. ATP synthetase
Term Place the basic steps in glycolysis in order. Definition 1. Glucose split into two molecules of glyceraldehyde-3-phosphate 2. NADH and ATP are formed 3. ATP and pyruvate are formed

What is the role of electron transport chain in cellular respiration?

The electron transport chain is the last stage of the respiration pathway. It is the stage that produces the most ATP molecules. The flow of the ions back across the membrane synthesises ATP by a protein called ATP synthase. Oxygen is the final hydrogen ion and electron acceptor.

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What is the role of the electron transport chain 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.

What is the function of the second electron transport chain?

The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that shuttles electrons from NADH and FADH2 to molecular oxygen. In the process, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.

What are the end products of light dependent reaction?

Difference between Light and Dark Reaction

Light Reaction Dark Reaction
The end products are ATP and NADPH. Glucose is the end product. ATP and NADPH help in the formation of glucose.
The water molecules split into hydrogen and oxygen. Glucose is produced. Co2 is utilized in the dark reaction.

What are the 3 products of the light dependent reactions?

The products of the light-dependent reactions, ATP and NADPH, have lifespans in the range of millionths of seconds, whereas the products of the light-independent reactions (carbohydrates and other forms of reduced carbon) can survive for hundreds of millions of years.

What are the products of light reaction?

The Light Reactions The energy is then temporarily transferred to two molecules, ATP and NADPH, which are used in the second stage of photosynthesis. ATP and NADPH are generated by two electron transport chains. During the light reactions, water is used and oxygen is produced.

What is the main source of energy of the light dependent reaction?

Light-dependent reactions happen in the thylakoid membrane of the chloroplasts and occur in the presence of sunlight. The sunlight is converted to chemical energy during these reactions. The chlorophyll in the plants absorb sunlight and transfers to the photosystem which are responsible for photosynthesis.

What compounds absorb light energy the best?


What starts light-dependent reactions?

The light-dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem. 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.

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Does light dependent reaction produce oxygen?

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. The light-dependent reactions release oxygen as a byproduct as water is broken apart.

Why is light dependent reaction important?

The overall purpose of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy will be used by the Calvin cycle to fuel the assembly of sugar molecules. The light-dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem.

What are the products of light dependent reactions Why are they important?

Figure 8.6. 1: The light-dependent reactions of photosynthesis (left) convert light energy into chemical energy, forming ATP and NADPH. These products are used by the light-independent reactions to fix CO2, producing organic carbon molecules.

What are the important events and products of light reaction?

Answer: The important events of light reaction are (i) Excitation of chlorophyll molecule to emit a pair of electrons and use of their energy in the formation of ATP from ADP + Pi. This process is called photophosphorylation. Splitting of water molecule (a) (b) End products of light reaction are NADPH and ATP.

What is another name for the light-independent reactions?

Calvin-Benson cycle

Why are photosynthesis and cellular respiration viewed as complementary processes?

Photosynthesis and cellular respiration are complementary because both depend on the inputs and outputs of both processes to continue. Photosynthesis requires CO2, which cellular respiration outputs, and cellular respiration needs oxygen which photosynthesis makes.

How do photosynthesis and cellular respiration work together?

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

What are the similarities and differences of photosynthesis and cellular respiration?

Cellular respiration takes place in the mitochondria of cells. While photosynthesis requires energy and produces food, cellular respiration breaks down food and releases energy. Plants perform both photosynthesis and respiration, while animals can only perform respiration.

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What are the processes of cellular respiration?

Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.

What are the three processes of cellular respiration?

The three stages of aerobic cellular respiration are glycolysis (an anaerobic process), the Krebs cycle, and oxidative phosphorylation.

What is the correct order of cellular respiration?

Ch. 9 Honors Biology Cellular Respiration

Question Answer
What is the correct sequence of stages of cellular respiration? glycolysis, Krebs Cycle, Electron Transport Chain
What is the correct equation for cellular respiration? C6H12O6 + 6 O2 –> 6 CO2 + 6 H2O
What are the products of cellular respiration? CO2, H2O, ATP

Where do the steps of cellular respiration occur?

The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion.

What are the 3 steps of cellular respiration and where does each occur?

Cellular respiration is the process in which cells break down glucose, release the stored energy, and use it to make ATP. The process begins in the cytoplasm and is completed in a mitochondrion. Cellular respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.

What are the stages of aerobic cellular respiration?

Aerobic respiration is divided into three main stages: Glycolysis, Citric acid cycle and Electron transport chain.

What are the two things needed for cellular respiration?

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.

What are the two phases of aerobic respiration?

Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.

What is the chemical reaction for aerobic respiration?

Aerobic respiration is the aerobic catabolism of nutrients to carbon dioxide, water, and energy, and involves an electron transport system in which molecular oxygen is the final electron acceptor. The overall reaction is: C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy (as ATP).