Hy-Vee produce gets ugly; Stores debuts Misfits program to sell imperfect fruits and vegetables at a lower cost to help reduce food waste. WEST DES MOINES â To combat the nationâs food waste issue, Hy-Vee Inc. recently began offering so-called âuglyâ produce in nearly all of its 242 grocery stores.
In other words, DNA polymerase is an enzyme that synthesizes a product by interpreting the existing DNA strand as a template and produces the complementary sequence of the template into a new strand. 3. DNA polymerases necessitate the presence of a primer to start synthesis.The reaction catalyzed by DNA polymerases that works to elongate the chain is a nucleophilic attack by the 3âOH terminus of the growing chain on the innermost phosphorus atom of the deoxynucleotide triphosphate.Therefore, a primer strand with a free 3'-OH group must be bound to the template strand from the start.he reaction catalyzed by DNA polymerases that works to elongate the chain is a nucleophilic attack by the 3âOH terminus of the growing chain on the innermost phosphorus atom of the deoxynucleotide triphosphate. Therefore, a primer strand with a free 3'-OH group must be bound to the template strand from the start.
polymerase chain reaction / PCR. Polymerase chain reaction, or PCR, is a laboratory technique used to make multiple copies of a segment of DNA. PCR is very precise and can be used to amplify, or copy, a specific DNA target from a mixture of DNA molecules.hen, to perform PCR, the DNA template that contains the target is added to a tube that contains primers, free nucleotides, and an enzyme called DNA polymerase, and the mixture is placed in a PCR machine. The PCR machine increases and decreases the temperature of the sample in automatic, programmed steps.