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28 Sep 2019
Why do purine:purine and pyrimidine:pyrimidine complements not exist?
a.Because purines form 3 Hydrogen bonds and pyrimidines only 2
b.Because the anti-parallel arrangement of DNA strands prevents them.
c.If only purine:pyrimidine pairs are permitted the helix will remain uniform in width from end to end.
d.Because DNA polymerase cannot initiate strand synthesis on its own.
Why do purine:purine and pyrimidine:pyrimidine complements not exist?
a.Because purines form 3 Hydrogen bonds and pyrimidines only 2
b.Because the anti-parallel arrangement of DNA strands prevents them.
c.If only purine:pyrimidine pairs are permitted the helix will remain uniform in width from end to end.
d.Because DNA polymerase cannot initiate strand synthesis on its own.
Keith LeannonLv2
28 Sep 2019
