According to Phoebus Levene's influential " tetranucleotide hypothesis ", DNA consisted of repeating units of the four nucleotide bases and had little biological specificity.
32.
Polymer is a term used to describe molecules consisting of structural units and a large number of repeating units connected by covalent chemical bonds.
33.
For example, a hydrocarbon molecule that is described as CH 3 ( CH 2 ) 50 CH 3, is a molecule with fifty repeating units.
34.
The four types of multimeric format include linear repeating units, linear repeating units with spacing, clusters, and branching " ( Fig . 4 ) ".
35.
Parentheses ( ) can be nested inside brackets to indicate a repeating unit, as in [ Co ( NH 3 ) 6 ] 3 +.
36.
The four types of multimeric format include linear repeating units, linear repeating units with spacing, clusters, and branching " ( Fig . 4 ) ".
37.
Note that the two fractal curves described above show a type of self-similarity that is exact with a repeating unit of detail that is readily visualized.
38.
A "'Thiacalixarene "'is a macrocycle or nomenclature is straightforward and involves counting the number of repeating units in the ring and include it in the name.
39.
For example, deoxyribose, a component of DNA, is a modified version of ribose; chitin is composed of repeating units of N-acetyl glucosamine, a nitrogen-containing form of glucose.
40.
The method finds application particularly where the structure is composed of repeating units or forms, or where multiple copies of the same basic structure are being constructed.
