• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The advantages and disadvantages of bacteria

Extracts from this document...

Introduction

The advantages and disadvantages of bacteria The advantages of bacteria for genetic Engineering are firstly economic- they contain a valuable source of enyzmes Bacteria produce more enzyme molecules in relation to their mass than most other organisms. The product yield can be increased by means of strain selection, mutation and optimisation of growth conditions. They are easy to manipulate genetically and can be subjected to gene transfer techniques. Secondly there is an environmental/economic advantage of bacteria- they can occupy a great variety of habitats and extremes of conditions, so their enzymes function in an enourmous range of PH and temperature. ("A New Introduction to Biology") Environmentally the bacteria used in genetic engineering chosen do not produce toxins or offensive odours and are non-pathogenic. ...read more.

Middle

By inhibiting Streptococcus mutans that convertsugar to lactic acid and slowly etch away the enamel on teeth. (http://www.newscientist.com/news/news.jsp?id=ns99991941) The technicalogical applications of bacteria are advantageous. The enzymes contained in different bacteria can be used in the dairy industry- extracellular lipase is used to ripen blue chesses from mould e.g Penicillum roguefortii. The production of cheese by separating milk into curd and whey may be achieved by the addition to the milk of the enzyme rennet or by the addition of a bacterial culture. Also In the ripening process, micro-organisms, most commonly lactic-acid-producing bacteria, act on the cheese to produce the desired body and flavour. (The Oxford Interactive Encyclopedia) ...read more.

Conclusion

Many people especially on the grounds of religion think it is immoral to "play God" by the use of modified bacteria. (http://www.biology-online.org/2/13_genetic_engineering.htm). The enzymes in the bacteria are highly sensitive to changes in the physical and chemical environment surrounding them- environmental disadvantage. They may be denatured by even a small temperature rise and change in pH. This means that the conditions in which they work must be stringently controlled. In particular the enzyme-substrate mixture must not be contaminated with other substances that might affect the reaction so the equipment used must be scrupulously clean- this is time consuming, so an economic disadvantage. In conclusion it seems that bacteria have more advantages than disadvantages and they may well lead to positive developments in the future. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Living Things in their Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Living Things in their Environment essays

  1. Marked by a teacher

    Biology- enzyme coursework

    4 star(s)

    The enzyme loses its specific shape so that the substrate no longer fits in to the active site. We say that the enzyme is denatured. Measurements: We used 6 different temperatures in this expirment: 25�C (24�C),30�C (29�C), 35�C,40�C,45�C (44�C) and 50�C (49�C).

  2. The comparison of bacterial content in a range of milks.

    The concentration of sodium hydroxide solution needs to remain the same (0.1M). As I am not mixing up new batches each time there should be no inconsistencies here. There is also a variable here. By using the same solution for the whole experiment, careful consideration must be taken to ensure that it does not evaporate.

  1. Introduction to bacteria

    Antibiotics produced by Bacteria: * Tetracycline * Sreptomycin * Cyclohexamide * Neomycin * Cycloserine * Erythromycin * Kanamycin * Lincomycin * Nystatin * Polymyxin B * Bacitracin In many cases the immune system can wipe out a bacterial infection on its own.

  2. Investigating the effect of four antibiotic agents on gram positive and gram negative bacteria.

    The active ingredient, which is responsible for garlic's anti-viral and anti-fungal properties, is allicin. This is also the ingredient that is responsible for the smell. A peeled garlic clove has little smell but as soon as it's crushed, the aroma is overwhelming.

  1. The main aim in the life science lessons is to learn how to handle ...

    This method help scientist to identify and characterize bacteria, as they are colourless and cannot be viewed under the microscope clearly. The bacteria will either retain the strong blue color of gentian violet or red. They can be identified as spherical (cocci), rod-shaped (bacilli), or corkscrew-shaped (spirochetes).

  2. Culturing Bacteria.

    wishes to separate out the individual colonies of different species of bacteria. Liquid cultures can also be grown using essentially the same method, but instead of the inoculating loop being run over agar, it is swirled in a nutrient broth solution.

  1. Using the streak plate method, compare the effect of two different brands of toothpaste ...

    The temperature will be kept constant by the setting on the incubator, and cellotape is added to ensure anaerobic bacteria grows. * All the agar plates will be left in the incubator for the same length of time. * All the agar plates will put back into the same incubator

  2. science in news

    A further 617 deaths were caused by workplace passive smoking, including 54 in the hospitality industry. (Researchers at University of Queensland in Australia) This table shows the amount of cigarettes used over a period of time by men and women Men Women All 1974 51 41 45 1978 45 37

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work