Asked by: Herica Gillesscience genetics
Why do A and T and G and C pair in a DNA double helix?
Last Updated: 5th May, 2020
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In this regard, what does T pair with in DNA?
The rules of base pairing (ornucleotidepairing) are: A with T: the purine adenine(A) alwayspairs with the pyrimidine thymine (T) Cwith G: thepyrimidine cytosine (C) always pairs with thepurine guanine(G)
One may also ask, why do DNA strands run in opposite directions? DNA strands run parallel to each other buttheyhave opposite alignments. A single DNA strand hastwoends. DNA double helix is in oppositedirectionsbecause of the opposite orientation of thesugar molecule inthem. This antiparallel arrangement allows basepairs to complementone another.
Similarly, you may ask, what does it mean for a double helix of DNA to be antiparallel and complementary?
The structure of DNA is called adoublehelix, which looks like a twisted staircase. Due tothe basepairing, the DNA strands are complementary toeachother, run in opposite directions, and arecalledantiparallel strands.
Why do purines have to pair with a pyrimidine?
Answer and Explanation: Purines pairwithpyrimidines because they both contain nitrogenousbaseswhich means that both molecules havecomplementarystructures that make up