A nitrogen-containing molecule having the chemical properties
of a base. DNA contains the nitrogenous bases adenine (A),
guanine (G), cytosine (C), and thymine (T).
See also: DNA (ORNL)
A gel-based laboratory procedure that locates mRNA sequences
on a gel that are complementary to a piece of DNA used as
a probe.
See also: DNA, library
(ORNL)
Nuclear transfer
A laboratory procedure in which a cell's nucleus is removed
and placed into an oocyte with its own nucleus removed so
the genetic information from the donor nucleus controls the
resulting cell. Such cells can be induced to form embryos.
This process was used to create the cloned sheep "Dolly".
See also: cloning (ORNL)
Nucleic acid
A large molecule composed of nucleotide subunits.
See also: DNA (ORNL)
Nucleolar organizing region
A part of the chromosome containing rRNA genes. (ORNL)
A subunit of DNA or RNA consisting of a nitrogenous base (adenine,
guanine, thymine, or cytosine in DNA; adenine, guanine, uracil,
or cytosine in RNA), a phosphate molecule, and a sugar molecule
(deoxyribose in DNA and ribose in RNA). Thousands of nucleotides
are linked to form a DNA or RNA molecule.
See also: DNA, base
pair, RNA (ORNL)
