Complementary DNA strands have an antiparallel orientation, meaning one strand has a 5’-to-3’ direction and the other has a 3’-to-5’ direction. What would happen if the DNA had a parallel orientation and both strands were positioned in a 5’-to-3’ direction?

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If complementary strands are parallel, the positive and negative charges of complementary nucleotides would attract, and additional hydrogen bonds would form, making it more difficult to pull apart the strands during DNA replication.

If complementary strands are parallel, nucleotide pairs would be oriented in such a way that the sugar-phosphate backbone would be under strain, and fewer hydrogen bonds would form.

If complementary strands are parallel, the positive and negative charges of complementary nucleotides would repel, and no phosphodiester bonds would form.

If complementary strands are parallel, the positive and negative charges of complementary nucleotides would repel, and no hydrogen bonds would form.

 

asked May 13, 2013 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

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If complementary strands are parallel, the positive and negative charges of complementary nucleotides would repel, and no hydrogen bonds would form.

 

answered May 13, 2013 by GeneX ~Top Expert~ (7,947 points)

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