Genetic engineering is a very controversial subject these days. Some people think that this kind of use of GE is beneficial. For example, vitamin A deficiency is the major cause of blindness in some parts of Asia. The introduction of vitamin A rice into these areas of Asia, where rice is the main food source, can prevent blindness within the population. The main perceived benefit of GE foods is that GE foods can provide diets very high in nutrition and therefore supplement people whose food supply is currently insufficient for good health.
Scientists use genes for antibiotic resistance when they manipulate genes in the laboratory.
These genes end up in the genetically engineered organisms. People think that the resistance may end up in bacteria, making the bacteria resistant to antibiotic treatment and thus endangering human health. People think that until we are able to ensure that the benefits of GE outweigh the risks, we should not use GE in our food supply. DNA is ubiquitous. It is the molecule of life.