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Erwin Chargaff.
"In 1949, Erwin Chargaff, a biochemist working at Columbia University, in New York City, made an interesting observation about DNA. Chargaff's data showed that for each organism he studied, the amount of adenine always equaled the amount of thymine (A=T). Likewise, the amount of guanine always equaled the amount of cytosine (C=G). However, the amount of adenine and thymine and of guanine and cytosine varied between different organisms."
-From my Biology textbook, "Biology: Principles & Explorations," Holt, Rinehart, and Winston.
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In DNA what does adenine always pair up with?
In DNA replication, adenine binds with thymine. In RNA, adenine binds with uracil.
What are the DNA base pairing rules?
Adenine always pairs with thymine Cytosine always pairs with guanine.
Which bases always pair on DNA?
Adenine pairs with thymine and guanine pairs with cytosine
What are the nucleotides called that pair with thymine in DNA?
Adenine always pairs with thymine in DNA.
What does adenine in DNA combine with?
In DNA, adenine is always covalently bonded to its complement thymine.
Which nitrogen bases can pair up together in DNA?
Adenine always pairs with Thymine, and Guanine always pairs with Cytosine. A with T, C with G.
What nitrogen base always pairs up with adenine?
adenine with thymine cytosine with guanine adenine with uracil cytosine with guanine
On dna what base will always pair with what base?
Adenine always pairs with thymine in a DNAmolecule.
What base will always pair with another base?
A purine will always pair with a pyrimidine. Examples of purines are adenine (pairs with thymine or uracil) and guanine (pairs with cytosine). Examples of pyrimidines are thymine (pairs with adenine), uracil (pairs with adenine), and cytosine (pairs with guanine).
What nitrogen base pair with adenine?
In DNA: Thymine pairs with Adenine. In RNA: Uracil pairs with Adenine.
What is the base unit of a nucleic acid?
The nitrogenous base units of a nucleic acid are Adenine, Cytosine, Guanine, and Thymine. (in Dna) in RNA Thymine is replaced with Uracil. These base pair are often abreviated to A,C,T,G, and U. Adenine will always pair with Thymine. Cytosine will always pair with guanine.
What is the rule of pairs for DNA?
Chargaff's rule states: Adenine will always pair with Thymine in DNA; Guanine will always pair with Cytosine in DNA. Note: In RNA, no thymine is present, and its replaced by uracil; therefore, in RNA, Adenine pairs with Uracil.
