Topic Responses Essay Example | Topics and Well Written Essays - 500 words

Topic Responses - Essay Example Stem cell research entails investigations on basic cells that have the ability to create other cells. Stem cell research has always been a controversial issue, but from my perspective, I believe it will have a lot of advantages (Cohen, 2012). Stem cell research will provide a breakthrough in medicine through coming up with means of treating some of the incurable diseases present todays (Cohen, 2012). With proper advancement of this field and proper channeling of the knowledge in stem cell, management of some incurable diseases might become possible in the future when they can manage to make the stem cells regenerate newer cells (Cohen, 2012). Bacteria are unicellular living microorganisms whereas viruses are nonliving. Viruses often live in a host in order to multiply whereas bacteria can even grow on any non-living surface (Cohen, 2012). Furthermore, viruses often invade a given host’s cells and then turn the given cell’s genetic material to make their own products (Cohen, 2012). Bacteria on the other hand carry their machineries needed for growth and multiplication with them. Viruses only carry information inform of DNA or RNA packaged in a proteins coat (Cohen, 2012). The commonest method used in identification of most bacterial species is the gram staining method (Cohen, 2012). This method is often used in identifying gram positive and gram negative bacteria on their basis of their cell wall properties. The first stain applied is the crystal violet, which then the bacteria is treated with a given mordant (Cohen, 2012). Later, the bacteria is washed by a decolorizing agent like alcohol then stained with safranin (red dye). Gram positives will be stained violet while gram negatives pink (Cohen, 2012). Acid fast staining is often used for bacteria that are not gram staining. It is mostly used for acid fast bacteria like