* A nucleotide variable depending on the type of nucleotide (purine or pyrimidine) attached to the carbon 1' of the pentose;
* pentose: a sugar with five carbon atoms ;
* a phosphate group (or phosphoric acid), identical for the nucleotides of DNA and RNA, attached to the 5 'carbon atom of the pentose, and to the 3' carbon atom of the nucleotide pentose following).
The Earth's gravitational force cannot do a positive or negative work on a geosynchronous communication satellite as long as it is on its circular orbit due to the fact that the gravitation force of the Earth is always at right angle to the orbital path.
El hipotálamo produce la hormona liberadora de corticotropina CRH que estimula la glándula pituitaria para secretar la hormona adrenocorticotropina ACTH.