1) Spica is the brightest star in the constellation Virgo. 2) Virgo is the mutable earth sign of the western zodiac. 3) Queen Elizabeth I was born on 7 September 1533, and so is a Virgo. 4) The Virgin Mary translates as Virgo Maria in Latin.
Phosphate group: A functional group characterized by a phosphorus atom bonded to four oxygen atoms (three single bonds and one double bond). One of these oxygen atoms must be bonded to another atom; if not, the structure is a phosphate ion. Generic phosphate group molecular structure.
Nucleotides can have different numbers of phosphate groups associated with the molecule, and the specific name of the nucleotide reflects its number of phosphate groups: Adenosine monophosphate (AMP) consists of an adenine ring (the base), ribose (the sugar) and one phosphate group. Adenosine diphosphate (ADP) has the same base and sugar, but two phosphate groups. Adenosine triphosphate (ATP) is composed of the same base and sugar, but three phosphate groups.