What are the complementary base pairs? What forms between them? What establishes polarity and how are the strands arranged?
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Explain complementary base pairing. which are purines and pyrimidines and who bonds to whom? how many hydrogen bonds form between them?
Adi S.
Complementary relationships between purines and pyrimidines allow adenine to form two hydrogen bonds with thymine (or uracil) and guanine to form three hydrogen bonds with cytosine to form double-stranded nucleic acids. provide highly ordered, repetitive bonding to form αα helices and ββ sheets within proteins. allow adjacent bases in a nucleotide chain to stack tightly, stabilizing the DNA double helix. allow the interaction of the oppositely charged amino acids to form the tertiary structure of proteins. allow adenine to form two hydrogen bonds with thymine (or uracil) and guanine to form three hydrogen bonds with cytosine to form double-stranded nucleic acids, and also allow adjacent bases in a nucleotide chain to stack tightly, stabilizing the DNA double helix.
Sana R.
The DNA molecule contains complementary nitrogen bases. There are four bases, but they pair as A-T and G-C with no cross pairing. How is this accomplished? A. A and G do not have their polar sites in the appropriate location to pair, and the same is true of T and C. B. More than one of the answers listed here are correct. C. A and G are polar leaning heavily to the positive. T and C are negative. A-G and T-C repel each other and cannot pair. D. A and T have two matching but opposite polar sites. G and C have 3 polar sites. The two poles will not attract and maintain attraction for three poles.
Anand J.
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