Menu Close

What is the most common reaction coupled with other reactions to power them within the cell quizlet?

What is the most common reaction coupled with other reactions to power them within the cell quizlet?

What is the most common reaction coupled with other reactions to power them within the cell? (Cells couple the exergonic reactions of ATP hydrolysis with endergonic reactions, thus allowing them to proceed. An example of this is a transmembrane ion pump, which is important for cellular function.)

What is a coupled reaction in cell biology?

Coupled reaction is a chemical reaction in which energy is moved from one side of the reaction to the other with a typical intermediate. The key energy-supplying enzyme for living cells is ATP. By coupling the exergonic reaction of ATP hydrolysis with endergonic reactions, cells use ATP to conduct function.

What reactions are coupled in photosynthesis?

Photosynthesis takes place in two distinct stages. In the light reactions, energy from sunlight drives the synthesis of ATP and NADPH, coupled to the formation of O2 from H2O. In the dark reactions, so named because they do not require sunlight, the ATP and NADPH produced by the light reactions drive glucose synthesis.

What reaction would be coupled with ATP?

ADP is combined with a phosphate to form ATP in the reaction ADP+Pi+free energy→ATP+H2O. The energy released from the hydrolysis of ATP into ADP is used to perform cellular work, usually by coupling the exergonic reaction of ATP hydrolysis with endergonic reactions.

Which reaction is likely coupled with hydrolysis of ATP quizlet?

In the cell, the hydrolysis of ATP is coupled to other endergonic reactions. When the terminal phosphate bond in ATP is broken by addition of a water molecule, a molecule of inorganic phosphate leaves the ATP, which becomes adenosine diphosphate, or ADP.

Which molecule is likely to have the most potential energy?

a) Glucose contains the most potential energy.

What are coupled reactions quizlet?

A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation-reduction reaction.

What are the coupled reactions in glycolysis?

Reaction is coupled to the hydrolysis of an ATP to ADP and Pi. This is the second irreversible reaction of the glycolytic pathway. Reaction 4: fructose-1,6-bisphosphate is split into 2 3-carbon molecules, one aldehyde and one ketone: dihyroxyacetone phosphate (DHAP) and glyceraldehyde 3-phosphate (GAP).

What are some examples of coupled reactions?

For Example:

  • Endogenic formation of ATP which is coupled for the dissipation of protein gradient.
  • ATP+Glucose->ADP+glucose-1-phosphate.
  • Glucose-1-phosphate+fructose-> sucrose + phosphate.
  • Sucrose is obtained from glucose and fructose with the expansion of energy stored in the form of ATP.

What is a coupled reaction quizlet?

Coupled reactions are defined as. reactions that are linked together, with the liberation of free energy in one reaction being used to drive the second reaction.

What happens in a coupled chemical reaction in a cell?

Coupled chemical reactions. Cells must obey the laws of chemistry and thermodynamics. When two molecules react with each other inside a cell, their atoms are rearranged, forming different molecules as reaction products and releasing or consuming energy in the process.

Which is an example of energy coupling in a cell?

The sodium-potassium pumps can illustrate an excellent example of energy coupling. Here, cells combine an exergonic reaction (ATP hydrolysis) with an endergonic reaction of a cellular process.

How is energy supplied in a coupled reaction?

In a coupled reaction energy required by 1 process is supplied by another process. For example: glucose + phosphate becomes glucose.6.phosphate. This is an endergonic reaction and the energy is supplied to this reaction by another reaction which has to be exergonic reaction i.e. ATP which can become ADP+energy.

Which is reaction requires energy to take place?

While some of these reactions require energy to take place, others, on the other hand, produce energy. For example, a catabolism chemical reaction is the one that produces energy, while an anabolism reaction is the one that requires energy. So, what is energy coupling?