Its bonding between the nitrogenous bases that allows for this structure to form. Purines always bond with pyrimidines. Topic 2 7 Dna Replication Transcription And Translation Amazing World Of Science With Mr Green The two strands of DNA are held together by hydrogen bonds between certain basesA and T and G and Cwhich explained Chargaffs rules. . What is the base pairing rule for Dna. DNA structure the basics DNA base pairing is determined by two structural factors nitrogenous base size and number and polarity of possible hydrogen bonds. In your own words describe the base-pairing rules in any DNA molecule. This is Chargaffs rule of base pairing. Purines have a double ring structure. What are the four types of bases found in a DNA molecule. Adenine A with thymine T in an A-T pairing and cytosine C with guanine G in a C-G pairing. Pyrimidines have a single ring structure. Just a fun fact. S...
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