Wednesday 11 May 2016

One strand of DNA has the nucleotide sequence AACGTA. What is the sequence of the other strand?

In a strand of DNA, the nitrogenous bases used to make up the "rungs" of the double-helix ladder are cytosine, guanine, adenine, and thymine.  These bases may be abbreviated cytosine (C), guanine (G), adenine (A), and thymine (T).  The bases pair up cytosine to guanine, while adenine pairs up to thymine.  When DNA replicates, the bases split right down the middle of the double-helix, providing a template for new DNA to be assembled.  If the...

In a strand of DNA, the nitrogenous bases used to make up the "rungs" of the double-helix ladder are cytosine, guanine, adenine, and thymine.  These bases may be abbreviated cytosine (C), guanine (G), adenine (A), and thymine (T).  The bases pair up cytosine to guanine, while adenine pairs up to thymine.  When DNA replicates, the bases split right down the middle of the double-helix, providing a template for new DNA to be assembled.  If the DNA is as given, AACGTA, the corresponding DNA sequence that would be complementary would be TTGCAT.  This base sequence would pair correctly, using the established DNA code as a template.  Each set of three bases is a set called a codon.  There are two codons in this given DNA sequence, AAC and GTA.  The corresponding codons that correctly match up to those two are TTG and CAT.

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