question: What causes the specificity of base pairing ?
answer: adenine and thymine align form two hydrogen bonds , whereas cytosine and guanine form three hydrogen bonds
turker_answer: The specificity of base pairing is adenine and thymine align form two hydrogen bonds , whereas cytosine and guanine form three hydrogen bonds .
rule-based: Adenine and thymine align form two hydrogen bonds , whereas cytosine and guanine form three hydrogen bonds causes the specificity of base pairing .