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Nucleic acids

Nucleic acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...

Nucleic Acids

Nucleic Acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...

Nucleic Acids

Nucleic Acids

Nucleic Acid Structure

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...

Nucleic Acids and Nucleotides

Nucleic Acids and Nucleotides

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria....

Biosynthesis of Nucleic Acids

Biosynthesis of Nucleic Acids

Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...

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Related Experiment Video

Updated: Feb 1, 2026

Kinetic Screening of Nuclease Activity using Nucleic Acid Probes

Kinetic Screening of Nuclease Activity using Nucleic Acid Probes

Published on: November 1, 2019

Prebiotic nucleic acids need space to grow.

Daniel Whitaker¹, Matthew W Powner²

¹Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.

Nature Communications

|December 13, 2018

Summary

Investigating early Earth conditions for nucleotide formation requires integrating mechanistic chemistry and planetary science. This interdisciplinary approach is key to identifying plausible nucleoside candidates for the origin of life.

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Area of Science:

Astrobiology
Geochemistry
Origin of Life Studies

Background:

Understanding the prebiotic conditions on early Earth is crucial for explaining the emergence of life's building blocks.
Nucleotides, the monomers of nucleic acids, are fundamental to all known life.
Identifying plausible formation pathways for nucleotides under early Earth conditions remains a significant challenge.

Purpose of the Study:

To explore the environmental conditions on early Earth conducive to nucleotide synthesis.
To identify the most likely nucleoside candidates that could have formed abiotically.
To emphasize the necessity of integrating mechanistic chemistry and planetary science for a comprehensive understanding.

Main Methods:

Review of existing literature on prebiotic chemistry and early Earth environments.
Analysis of geochemical models for plausible early Earth conditions.
Evaluation of proposed chemical pathways for nucleotide and nucleoside formation.

Main Results:

Early Earth conditions likely involved specific ranges of temperature, pH, and available chemical precursors.
Certain nucleoside structures are more chemically plausible than others given proposed prebiotic syntheses.
Interdisciplinary collaboration is essential for robust conclusions.

Conclusions:

The formation of nucleotides on early Earth was likely contingent on specific, yet plausible, environmental conditions.
Mechanistic chemistry and planetary science must be integrated to advance the study of life's origins.
Further research should focus on experimentally validating proposed nucleoside candidates under simulated early Earth conditions.