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What are the complementary bases in DNA? Biomolecules

What are the complementary bases in DNA? Biomolecules

Grade:12th pass

2 Answers

Simran Vinaik
askIITians Faculty 1230 Points
6 years ago
DNA is a double helix strand of nucleotides. There are 4 type of bases: Adenine(A),Guanine(G),Cytosine(C), andThymine(T).

Adenine forms 2 hydrogen bonds with thymine. So we say complementary base of adenine is thymine.

Guanine forms 3 hydrogen bonds with cytosine. So we say complementary base of guanine is cytosine.554-765__38889947_dna_mouse2_203.gif
The nucleotides in a base pair are complementarywhich means their shape allows them to bond together withhydrogen bonds.
The first two (A, G) are examples of a purinewhich contains a six atom ring and five atom ring sharing two atoms.
The second two (C, T) are examples of apyrimidinewhich is composed of a single six atom ring.
Notice that each base pair consists of a purine and a pyrimidine.554-1842_BasePairing.gif
Simran Vinaik
askIITians Faculty 1230 Points
6 years ago
DNA is a double helix strand of nucleotides. There are 4 type of bases: Adenine(A),Guanine(G),Cytosine(C), andThymine(T).

Adenine forms 2 hydrogen bonds with thymine. So we say complementary base of adenine is thymine.

Guanine forms 3 hydrogen bonds with cytosine. So we say complementary base of guanine is cytosine.554-765__38889947_dna_mouse2_203.gif
The nucleotides in a base pair are complementarywhich means their shape allows them to bond together withhydrogen bonds.
The first two (A, G) are examples of a purinewhich contains a six atom ring and five atom ring sharing two atoms.
The second two (C, T) are examples of apyrimidinewhich is composed of a single six atom ring.
Notice that each base pair consists of a purine and a pyrimidine.

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