Adenine(purine)=========thymine(pyrimidine)
Guanine(purine)----------------cytosine(pyrimidine)
the answer is four (4) billion pairs
The four bases of a DNA molecule are called adenine, thymine, cytosine, and guanine.
The bases in DNA are paired by hydrogen bonds.
Adenine pairs with ThymineGuanine pairs with Cytosine
Hydrogen bonds are the type of bond that keeps the bases paired together in a DNA molecule. These bonds form between the complementary bases adenine-thymine and guanine-cytosine.
Nitrogenous bases, such as adenine, thymine, cytosine, and guanine, along with sugar phosphate groups, make up the DNA molecule. These nitrogenous bases are paired together to form the characteristic double helix structure of DNA.
If the spiral molecule is DNA then the four bases are Adenine, Thymine, Cytosine and Guanine.
There are four types of bases in DNA: adenine, cytosine, guanine, and thymine. However, a molecule of DNA may be a polymer of millions of these bases in a specific arrangment.
adnine thyanine guanine cytocine
The DNA molecule consists of paired nucleotides that make each "rung" of the ladder. Each nucleotide is made up of a one of four nitrogenous bases (adenine, guanine, cytosine, or thymine), a five-carbon sugar (either ribose or 2'-deoxyribose), and a phosphate molecule.
a DNA molecule has two paired strands. ~
The paired bases are held together by hydrogen bonds. Refer to the related link below for an illustration.