Cytosine

... of C, A, and T nucleotides? Explain how you figured this out. I know that the actual test he concluded that guanine was approx. equal to cytosine and the same with adenine and thynine... the first thing that i thought was ,"would it be G 20% and C 80%" but it doesn't make sense ...

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Perfect post by kolean, in terms of hydrogen bonding adenine and thymine are linked by 2 hydrogen bonds while guanine and cytosine are linked with 3 hydrogen bonds, thus the DNA strand with the greater ratio of CG will thus have more hydrogen bonds.

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... Species B. They both have the same amount of DNA, but have different ratios of the nucleotide bases. Do remember that Guanine is base paired with Cytosine (G+C), and Adenine is base paired with Thymidine (A+T). Species A has a G+C/A+T ratio of 2.0 (for every 2 G+C there is 1 A+T) Species B has ...

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... know which acids are pyrimidines and which are purines **hint: remember Pur As Gold (Purines= Adenine and Guanine) and Cut The Pye (Pyrimidines = Cytosine and Thymine) - these 2 functional groups are always found in amino acids - what are plasmodesmata similar to in animals? - what functional ...

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Yeah, 5-methyl cytosine gets spontaneously converted into thymine and in every case where it happens the G is correctly placed and T is wrong. But G-T mismatches can be formed due to some other reasons too ( e.g. replication errors) ...

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