Effects of water pollution. You will notice in the previous pages that water pollution is very harmful to humans, animals and water life. The effects can be catastrophic, depending on the kind of chemicals, concentrations of the pollutants and where there are polluted. Below, we shall see a summary of the effects of water pollution.
Recombinant DNA is an artificial form of DNA that cannot be found in natural organisms. It is made in the laboratory by joining together genes taken from different sources. This is done by selecting and cutting out a gene at a specific point on a strand of DNA using restriction enzymes which act as molecular scissors.
recombinant DNA, a DNA molecule in which rearrangement of the genes has been experimentally induced. Enzymes are used to break isolated DNA molecules into fragments that are then rearranged in the desired sequence.NA sequences from another organism of the same or a different species may also be introduced into the molecule, which is then replicated, resulting in both genotypic and phenotypic alterations in the organism that carries the recombinant DNA.