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 Technology. Recombinant DNA Technology. All organisms on Earth evolved from a common ancestor, so all organisms use DNA as their molecule of heredity. At the chemical level, DNA is the same whether it is taken from a microscopic bacterium or a blue whale.As a result, DNA from different organisms can be âcut and pastedâ together, resulting in ârecombinant DNAâ. The first recombinant DNA molecule was produced in 1972 by Stanford researcher Paul Berg.f the DNA from the different sources is cut with the same restriction enzyme, the cut ends can be joined together and then sealed into a continuous DNA strand by the enzyme ligase. In 1973, the first organism to contain recombinant DNA was engineered by Herb Boyer (UCSF) and Stanley Cohen (Stanford University).