Skip to main content
Ch.21 The Generation of Biochemical Energy
McMurry - Fundamentals of General, Organic, and Biological Chemistry 8th Edition
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMcMurry 8th EditionCh.21 The Generation of Biochemical EnergyProblema 4
Capitolo 21, Problema 4

Acetyl phosphate, whose structure is given here, is another compound with a relatively high free energy of hydrolysis.
Structural formula of acetyl phosphate, showing its high free energy of hydrolysis with carbon, oxygen, and phosphorus atoms.
Using structural formulas, write the equation for the hydrolysis of this phosphate.

Guida verificata passo dopo passo
1
Identify the structure of acetyl phosphate. Acetyl phosphate consists of an acetyl group (CH3CO-) attached to a phosphate group (-PO4). This compound undergoes hydrolysis, meaning it reacts with water (H2O).
Understand the concept of hydrolysis. In this reaction, the bond between the acetyl group and the phosphate group is broken, and water is used to split the molecule into two products.
Write the reactants for the hydrolysis reaction. The reactants are acetyl phosphate (CH3CO-PO4) and water (H2O).
Determine the products of the hydrolysis reaction. The acetyl group will form acetic acid (CH3COOH), and the phosphate group will form inorganic phosphate (HPO4^2− or H2PO4^−, depending on the pH).
Combine the reactants and products into a balanced chemical equation. The equation should show acetyl phosphate reacting with water to produce acetic acid and inorganic phosphate, ensuring the conservation of mass and charge.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
2m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Hydrolysis of Phosphates

Hydrolysis of phosphates involves the reaction of a phosphate compound with water, resulting in the breakdown of the compound and the release of energy. In biological systems, this process is crucial for energy transfer, as it often leads to the formation of inorganic phosphate and other products. Understanding the mechanism of hydrolysis helps in grasping how energy is utilized in cellular processes.
Video consigliato:
Percorso guidato
1:12
Acidic Hydrolysis Concept 1

Free Energy of Hydrolysis

The free energy of hydrolysis refers to the amount of energy released when a phosphate bond is broken during hydrolysis. Compounds like acetyl phosphate have a high free energy of hydrolysis, making them important energy donors in biochemical reactions. This concept is essential for understanding how energy is stored and released in metabolic pathways.
Video consigliato:
Percorso guidato
01:04
Gibbs Free Energy (Simplified) Concept 3

Structural Formulas

Structural formulas represent the arrangement of atoms within a molecule, illustrating how they are bonded together. In the context of hydrolysis, drawing the structural formula of acetyl phosphate allows for a clearer understanding of the reaction mechanism and the specific bonds that are broken during hydrolysis. This visual representation is crucial for predicting the products of the reaction.
Video consigliato:
Percorso guidato
1:01
Structural Formula Concept 2
Pratica correlata
Domanda del libro di testo

The hydrolysis of acetyl phosphate to give acetate and hydrogen phosphate ion has ∆G = -10.3 kcal/mol (-43.1 kJ/mol). Combine the equations and ∆G values to determine whether coupling of this reaction with phosphorylation of ADP to produce ATP is favorable. (You need give only compound names or abbreviations in the equations.)

908
views
Domanda del libro di testo

The overall equation in this section,

shows the cycle between photosynthesis and oxidation. Pathways operating in opposite directions cannot be exergonic in both directions.

a. Which of the two pathways in this cycle is exergonic and which is endergonic?

930
views
Domanda del libro di testo

A common metabolic strategy is the lack of reactivity—that is, the slowness to react—of compounds whose breakdown is exergonic. For example, hydrolysis of ATP to ADP or adenosine monophosphate (AMP) is exergonic but does not take place without an appropriate enzyme present. Why would the cell use this metabolic strategy?

935
views
Domanda del libro di testo

One of the steps in lipid metabolism is the reaction of glycerol (1,2,3-propanetriol, HOCH2CH(OH)CH2OH, with ATP to yield glycerol 1-phosphate. Write the equation for this reaction using the curved arrow symbolism.

1260
views