Complementary Relationships Between Purines and Pyrimidines

question 38

Multiple Choice

Complementary relationships between purines and pyrimidines

• A)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.
• B)allow the interaction of the oppositely charged amino acids to form the tertiary structure of proteins.
• C)allow adjacent bases in a nucleotide chain to stack tightly,stabilizing the DNA double helix.
• D)provide highly ordered,repetitive bonding to form α helices and β sheets within proteins.
• E)Both A and C are correct.

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