A Sample of Chargaff's Data on the DNA Base Composition

question 28

Essay

A sample of Chargaff's data on the DNA base composition in various species is provided.Discuss several conclusions that may be drawn from this data.
$$\begin{array} { | c | c | c | c | c | } \hline \text { SPECIES } & \text { A } & \mathrm { T } & \mathrm { G } & \mathrm { C } \\\hline \text { Hurnar1 } & 31.0 & 31.5 & 19.4 & 18.4 \\\hline \text { Fruit fly } & 27.3 & 27.6 & 22.5 & 22.5 \\\hline \text { Corn } & 25.6 & 25.3 & 24.5 & 24.6 \\\hline \text { Neurospora (furgus) } & 23.0 & 23.3 & 27.1 & 26.6 \\\hline \text { E coli (bacteriurn) } & 24.6 & 24.3 & 25.5 & 25.6 \\\hline\end{array}$$

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Definitions:

Hot Aqueous Acid

Utilized in chemistry for hydrolysis reactions, it involves the use of heated water and acid to break chemical bonds in substances.

Hydrolysis

A chemical reaction that involves the breaking of a bond in a molecule using water, commonly seen in the breakdown of biomolecules.

Nitriles

Organic compounds containing a cyano group (-C≡N) bonded to an alkyl group, known for their use in organic synthesis and as solvents.

Amides

Organic compounds characterized by a carbonyl group (C=O) attached to a nitrogen atom.