Question

Differentiate between the de novo synthesis of nucleotides and salvage-pathway synthesis.

Name: Problem 1, Chapter 25: Biochemistry
Uploaded: 2020-08-15T16:18:12-08:00
Duration: 23 s
Channel: Carlene Jimenez
Description: Differentiate between the de novo synthesis of nucleotides and salvage-pathway synthesis.

   Differentiate between the de novo synthesis of nucleotides and salvage-pathway synthesis.

Biochemistry

Jeremy M. Berg, John… 8th Edition

Chapter 25, Problem 1

Instant Answer

Solved by Expert Carlene Jimenez

08/15/2020

Step 1

This process is energy-intensive as it requires several enzymatic reactions to form the nucleotide bases. The de novo synthesis pathway is the primary source of nucleotides in the cell. The process can be represented as follows: \[ \text{{Simple compounds}} Show more…

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Differentiate between the de novo synthesis of nucleotides and salvage-pathway synthesis.

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Key Concepts

Nucleotide Salvage Pathway

This pathway involves the recycling of free bases and nucleosides that are released during the breakdown of nucleic acids. It is a more energy-efficient process compared to de novo synthesis, as it repurposes existing components rather than synthesizing them from scratch. The salvage pathway is particularly important in tissues where energy conservation is crucial and in cells that have limited capacity for de novo synthesis.

De Novo Nucleotide Synthesis

This concept refers to the biochemical pathway where nucleotides are entirely assembled from basic, simple precursors such as amino acids, carbon dioxide, and ribose phosphate. It is an energy-intensive, multi-step process that is essential when the demand for new nucleotides is high, such as during rapid cell proliferation, and it involves tightly controlled enzymatic reactions with built-in feedback inhibition mechanisms.

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