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He didnt discover DNA,
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.
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When did erwin chargaff discover the base pairing rule?
in the 1950's
Chargaff showed that DNA contains equal amounts of cytosine and?
guanine
Chargaff contribution to structure of DNA?
Chargaff was the one who discovered that Adenine (A) combines with Thymine (T) and Cytosine (C) pairs up with Guanine (G)
Explain how chargaff's helped watson and crick model dna?
Chargaff discovered that in DNA the percentages of adenine and thymine were the same, and the percentages of cytosine and guanine are the same. This led to the idea of base-pairing between adenine and thymine, and cytosine and guanine.
What did chargraff discover about the frequency of the nucleotides?
Chargaff discovered that in DNA, there is a 1:1 ratio of adenine and thymine, and a 1:1 ratio of guanine and cytosine. This led to the rule that adenine always pairs with thymine and guanine always pairs with cytosine.
Who discovered the amount of adenine in DNA is always equal the amount of thymine?
Erwin Chargaff
Describe the two pieces of information from other scientists that enabled James Watson and Francis Crick to discover the double-helical structure of DNA?
Before Watson and Crick could discover the shape of DNA, Swiss chemist Friedrich Miescher had to discover DNA in the first place. Later, Phoebus Levene and Erwin Chargaff would begin investigating the structure of DNA.
What did chargraff discover?
The American biochemist Erwin Chargaff discovered that DNA is the primary constituent of the gene, thereby helping to create a new approach to the study of the biology of heredity.
When did erwin chargaff discover the base pairing rule?
in the 1950's
Chargaff showed that DNA contains equal amounts of cytosine and?
guanine
Explain how Chargaff rules helped Watson and Crick model Dna?
How
What is Chargaff known for?
In 1950, Erwin Chargaff analysed the base composition of DNA composition in a number of organisms. He reported that DNA composition varies from one species to another so allowing for the ascertaining of differential.
Chargaff contribution to structure of DNA?
Chargaff was the one who discovered that Adenine (A) combines with Thymine (T) and Cytosine (C) pairs up with Guanine (G)
Who showed that DNA contains equal amounts of certain nitrogen bases?
Chargaff
Explain how chargaff's helped watson and crick model dna?
Chargaff discovered that in DNA the percentages of adenine and thymine were the same, and the percentages of cytosine and guanine are the same. This led to the idea of base-pairing between adenine and thymine, and cytosine and guanine.
How are the base pairing rules related to Chargaff on DNA?
Chargaff's rules state that DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.
Who proposed the base pairing rule?
Watson and Crick came up with the base-pairing rule for nucleic acids using Chargaff's rule that in DNA the percentages of adenine and thymine are equal, and the percentages of guanine and cytosine are equal. Refer to the related link below.
