In DNA, purines and pyrimidines bind with each other to form what are known as base pairs. If you imagine a double-helix strand of DNA as a twisted ladder, these nitrogenous base pairs are the rungs.

Genes exist in most cells. Inside a cell is a long strand of the chemical DNA (deoxyribonucleic acid). A DNA sequence is a specific lineup of chemical base pairs along its strand. The part of DNA ...

As previously mentioned, the location at which a DNA strand begins to unwind into two ... vary in length (from about 200 to 1,000 base pairs) and sequence, except among closely related organisms ...

Credit: Kateryna Kon/Science Photo Library/ What is DNA, and how does it work? You don't need a degree in ...

We've now zoomed in enough to see portions of the DNA strand. The DNA is wrapped ... of the DNA ladder consists of two bases. In the DNA molecule, A always pairs up with T, and C always pairs ...

This base-to-base bonding is not random; rather, each A in one strand always pairs with a T in the other strand, and each C always pairs with a G. The double-stranded DNA that results from this ...

Using the 4 possible combinations of base pairs as a binary system ... This involves carefully selecting the length and sequence of each DNA strand to ensure that it will bind to the appropriate ...

Whether it is a microbe, a rose, or a dolphin, any form of life gets its building and operating instructions from the molecule of life, DNA ... on each strand pair up with free nucleotides ...

An STR is a short sequence of base-pairs on the DNA that is repeated some number of times, such as GATCGATCGATCGATC (on the complementary strand, this STR will have the sequence CTAGCTAGCTAGCTAG).

DNA strand displacement circuits are inching closer to becoming cellular machines. Scientists are finding ways to make these ...

The sequence of these base pairs along the DNA strand encodes genetic information. During DNA replication, the complementary base pairing ensures faithful copying of the genetic material. In RNA, ...