Science / Chemistry / Nitrogen: Element number 7, a colorless, odorless, tasteless gas that makes up about 80% of the earth's atmosphere.

Nitrogenous Base

Science / Genetics / Nitrogenous Base: 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). MORE

Nitrogen (N)

Science / Periodic Table of Elements / Nitrogen (N): Atomic number: 7, Atomic mass: 14.0067 g.mol -1, Electronegativity: 3.0, Density: 1.25*10-3 at 20°C, Melting point: -210 °C, Boiling point: -195.8 °C, Vanderwaals radius: 0.092 nm, Ionic rad MORE

Nitrogen Fixation

Science / Marine Biology / Nitrogen Fixation: The conversion of gaseous nitrogen to nitrate by specialized bacteria. MORE

Nitrogen (N2)

Science / Weather / Nitrogen (N2): A colorless, tasteless, odorless gas that is the most abundant constituent of dry air. It comprises 78.09%. MORE

Base Pair (BP)

Science / Genetics / Base Pair (BP): Two nitrogenous bases (adenine and thymine or guanine and cytosine) held together by weak bonds. Two strands of dna are held together in the shape of a double helix by the bonds between base pairs. MORE


Science / Chemistry / Protein: A complex polymer made by linking together amino acid molecules. Proteins sometimes contain non-amino acid components such as metal ions or porphyrin rings embedded within. MORE