BIO 3102 Study Guide - Cell Adhesion Molecule, Geologic Time Scale, Paleoproterozoic
Document Summary
The archean (pronounced / r ki n/, also spelled archaean, formerly called the archaeozoic (/ rki zo k/), also spelled archeozoic or arch ozoic) is a geologic eon before the paleoproterozoic era of the. Proterozoic eon, before 2. 5 ga (billion years ago, or 2,500 ma). Instead of being based on stratigraphy, this date is defined chronometrically. Biomonomers: (complexer compounds) such as amino acids and nucletotides. Cellulose, starch, chitin, proteins, peptides, dna and rna are all examples of biopolymers, in which the monomeric units, respectively, are sugars, amino acids, and nucleotides. Carbon is the chemical element with symbol c and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent making four electrons available to form covalent chemical bonds. The central dogma of molecular biology deals with the detailed residue-by-residue transfer of sequential information. It states that information cannot be transferred back from protein to either protein or nucleic acid.
