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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.
What else can I help you with?
In DNA what does adenine always pair up with?
In DNA replication, adenine binds with thymine. In RNA, adenine binds with uracil.
According to chargaffs rules which nucleotide is always paired with adenine in a DNA molecule?
Thymine is always paired with adenine in a DNA molecule according to Chargaff's rules. They form a complementary base pair, with adenine pairing with thymine through two hydrogen bonds.
What does adenine in DNA combine with?
In DNA, adenine is always covalently bonded to its complement thymine.
What are the nucleotides called that pair with thymine in DNA?
Adenine always pairs with thymine in DNA.
What are the DNA base pairing rules?
Adenine always pairs with thymine Cytosine always pairs with guanine.
What nitrogen base always pairs up with adenine?
adenine with thymine cytosine with guanine adenine with uracil cytosine with guanine
Which nitrogen bases can pair up together in DNA?
Adenine (A) can pair with thymine (T), and cytosine (C) can pair with guanine (G) in DNA through hydrogen bonding. This complementary base pairing is essential for the stability and accurate replication of DNA molecules.
What base can adenine pair?
In DNA, adenine pairs with Thymine In RNA, adenine pairs with Uracil The code letters are A, T, G, C, which stand for adenine, thymine, guanine, and cytosine. These four chemicals create DNA.
What nitrogen base can pair with adenine?
Thymine can pair with adenine in DNA, while uracil can pair with adenine in RNA.
What nitrogen base pair with adenine?
In DNA: Thymine pairs with Adenine. In RNA: Uracil pairs with Adenine.
Are there always going to be an equal number of adenine and thymine nucleotides in a molecule why?
Yes, there will always be an equal number of adenine (A) and thymine (T) nucleotides in a DNA molecule. This is because adenine always pairs with thymine through hydrogen bonding in a double-stranded DNA molecule, following Chargaff's rule.
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.
