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A=T and C=G

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Q: What did Erwin Chargaff conclude about the four bases?
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What are the four nitrogen bases in DNA?

nucleotides chargaff and the structure question


What did Erwin Chargaff accomplish in his life?

Erwin Chargaff proposed two main rules in his lifetime which were appropriately named Chargaff's rules. The first and best known achievement was to show that in natural DNA the number of guanine units equals the number of cytosine units and the number of adenine units equals the number of thymine units. The second of Chargaff's rules is that the composition of DNA varies from one species to another, in particular in the relative amounts of A, G, T, and C bases. Such evidence of molecular diversity, which had been presumed absent from DNA, made DNA a more credible candidate for the genetic material than protein.


What statement about Chargaffs rules is carrect?

Observations by Erwin Chargaff that concentrations of the four nucleotide bases differ among species. Within a species, the concentrations of adenine and thymine are always about the same and the concentrations of cytosine and guanine are always about the same. In each species, the amount of adenine equals the amount of thymine. The amount of guanine equals the amount of cytosine.


Four nitrogen bases in RNA?

The four nitrogenous bases in RNA are adenosine, guanine, uracil and cytosine.


What four nitrogenous bases does DNA contain?

The four nitrogenous bases in in DNA are adenine, thymine, cytosine, and guanine.


How many bases are there on a basketball field?

There are no bases on a basketball court.There are four bases on a baseballfield.


Does a prism have more than two bases?

yes.prism has four bases.


What are the four nitrogenous bases that can make up a nucleotide?

The four nitrogenous bases of DNA are adenine, thymine, cytosine and guanine


Can a prism have two bases and four faces?

Sometimes,only because,a rectangular prism has two bases and four faces, but a triangular prism has two bases and three faces.


What are the four nitrogen bases that make up the rungs of the double helix?

In DNA, the four bases are: adenine, guanine, thymine and cytosine.


How many bases are there?

In Baseball there are four bases: first, second, third, and home.


What can you conclude from the fact that there have been just four eons in Earth's history?

Because Earth's history is 4.567 billion years old, you can conclude that an Earth eon covers a large segment of time.