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How does ATP couple exergonic and endergonic reactions?
Energy is usually released from the ATP molecule to do work in the cell by a reaction that removes one of the phosphate- oxygen groups, leaving adenosine disphosphate (ADP). When the ATP converts to ADP, the ATP is said to be spent. Then the ADP is usually immediately recycled in mitochondria where it is recharged and comes out again as ATP.
What reactions are coupled in aerobic respiration?
In aerobic respiration, the reactions that are coupled include glycolysis, the citric acid cycle (Krebs cycle), and the electron transport chain. These reactions work together to break down glucose and produce ATP, the main energy currency of the cell.
What is the role of ATP in coupled reaction?
ATP is used as an energy carrier in coupled reactions. It provides the energy needed for endergonic (energy-requiring) reactions to proceed by transferring a phosphate group to the substrate, making it more reactive. This coupling of an exergonic (energy-releasing) reaction with an endergonic one allows cells to efficiently carry out their metabolic processes.
Is the formation of ATP an endergonic reaction?
No, the formation of ATP is an exergonic reaction, meaning it releases energy. This is because the conversion of ADP and inorganic phosphate to ATP is coupled with cellular processes that release energy, such as the breakdown of glucose during cellular respiration.
Which of the following statements about the role of ATP in cell metabolism is true?
The energy from the hydrolysis of ATP may be directly coupled to endergonic processes by the transfer of the phosphate group to another molecule. A key feature in the way cells manage their energy resources to do this work is energy coupling, the use of an exergonic process to drive an endergonic one. ATP is responsible for mediating most energy coupling in cells, and in most cases it acts as the immediate source of energy that powers cellular work.
Why are endergonic and exergonic reactions are said to be coupled in living cells?
Endergonic reactions absorb energy, while exergonic reactions release energy. In living cells, these reactions are coupled so that the energy released from exergonic reactions can be used to drive endergonic reactions. This coupling allows cells to maintain energy balance and perform essential functions.
In cells endergonic reactions are often coupled with enzymatic reactions that store energy True or false?
True. Endergonic reactions, which require energy input, are often coupled with exergonic reactions that release energy through enzymatic processes. The energy released from the exergonic reaction is used to drive the endergonic reaction forward. This coupling allows the cell to maintain energy balance and perform various functions.
Are exergoinic and endergoic reactions frequently coupled?
Yes, exergonic and endergonic reactions are frequently coupled in living organisms to efficiently transfer energy between processes. The energy released from an exergonic reaction can drive an endergonic reaction, allowing the cell to carry out necessary functions while maintaining energy balance.
How does ATP couple exergonic and endergonic reactions?
Energy is usually released from the ATP molecule to do work in the cell by a reaction that removes one of the phosphate- oxygen groups, leaving adenosine disphosphate (ADP). When the ATP converts to ADP, the ATP is said to be spent. Then the ADP is usually immediately recycled in mitochondria where it is recharged and comes out again as ATP.
How do energy carriers participate in coupled reactions?
Energy carriers like ATP can participate in coupled reactions by providing the necessary energy to drive an endergonic reaction (which requires energy input) by being hydrolyzed into ADP and inorganic phosphate, releasing energy in the process. This released energy can then be used to drive an exergonic reaction (which releases energy) by providing the required activation energy for the reaction to occur. In this way, energy carriers facilitate coupling reactions that require an input of energy.
An endergonic reaction that is driven by the splitting of ATP molecules?
In an endergonic reaction, the overall energy change is positive, requiring input of energy. By breaking down ATP molecules, which release energy, the energy released can drive the endergonic reaction forward. This coupling of the endergonic reaction with the exergonic ATP hydrolysis allows the endergonic reaction to proceed.
What are two advantages of the presence of coupled reactions?
A coupled reaction is a chemical reaction having a common intermediate in which energy is transferred from one side of the reaction to the other. Many things are made this way.
What reactions are coupled in aerobic respiration?
In aerobic respiration, the reactions that are coupled include glycolysis, the citric acid cycle (Krebs cycle), and the electron transport chain. These reactions work together to break down glucose and produce ATP, the main energy currency of the cell.
What is the role of ATP in coupled reaction?
ATP is used as an energy carrier in coupled reactions. It provides the energy needed for endergonic (energy-requiring) reactions to proceed by transferring a phosphate group to the substrate, making it more reactive. This coupling of an exergonic (energy-releasing) reaction with an endergonic one allows cells to efficiently carry out their metabolic processes.
Is the formation of ATP an endergonic reaction?
No, the formation of ATP is an exergonic reaction, meaning it releases energy. This is because the conversion of ADP and inorganic phosphate to ATP is coupled with cellular processes that release energy, such as the breakdown of glucose during cellular respiration.
What term is used to describe a situation in which energy released from one reaction provides the energy required for another reaction?
This is known as a coupled reaction, where the energy released from an exergonic reaction drives an endergonic reaction by transferring energy.
What is a classic coupled reaction?
A classic coupled reaction is the hydrolysis of ATP, where energy released from the break down of ATP is used to drive an endergonic reaction. This coupling of reactions is common in many cellular processes, where the energy released from one reaction is utilized to power another reaction.
