Coin grading. Coin grading is the process of determining the grade or condition of a coin, one of the key factors in determining its value. A coin's grade is generally determined by five criteria: strike, preservation, luster, color, and attractiveness. Several grading systems have been developed. Certification services professionally grade coins for tiered fees.
DNA is composed of repeating units called nucelotides or nucleotide bases. DNA polymerase is responsible for the process of DNA replication, during which a double-stranded DNA molecule is copied into two identical DNA molecules.NA polymerase / DNAP. DNA polymerase (DNAP) is a type of enzyme that is responsible for forming new copies of DNA, in the form of nucleic acid molecules. Nucleic acids are polymers, which are large molecules made up of smaller, repeating units that are chemically connected to one another.
DNA replication is the process by wich one double helix of DNA is dublicated into two identical double helices which are also identical to the mother DNA. The process is carriâ¦ed by specific enzymes. RNA transcription is the process by which a messanger RNA copy of the active strand of a DNA helix is made. This process is carried by different enzymes and the result is a single strand of mRNA.