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

Biology - HIV Prevention and Transmission

Extracts from this document...


Biology Essay HIV Prevention and Transmission AOIs: C&S, H&SE Student: Aleksandar Bukurecki Teacher: Elvira Kukuljac Sarajevo, 19/10/11 Viruses are unique in that they have been classified as both living and nonliving, the reason for this is that they cannot reproduce without a host cell. Also they are acellular, which mean they don't have cells1. There are many different viruses, our body can fight most of the viruses but there are some that we cannot even fight with medics. HIV, Human Immunodeficiency Virus, is one of those. We still don't know how HIV evolved but there are a number of theories. One thing we know is that HIV probably evolved in Africa. The most commonly accepted theory is the "hunter theory"2. The SIV, Simian Immunodeficiency Virus, was transferred to humans as a result of chimps being killed and eaten, or their blood getting into cuts or wounds on a hunter. ...read more.


Uncontrolled blood transfusion, drugs and travel all helped HIV spread all over the world. Now let's see how HIV attacks our cells. The structure of HIV consists of three main parts, the genetic material, proteins and the envelope. The replication of HIV consists of a few steps. First is the fusion with the host cell, then HIV releases the viral proteins into the host cell and the reverse transcription starts, which mean the RNA from HIV is used to create the viral DNA, the reverse transcriptase enzyme does this. That viral DNA is then transported to the nucleus and is attached to the host DNA. Now the host cell crates new viral RNA which is used to make viral proteins. In the last step they all move together out of the cell and form a new HIV3. ...read more.


Also HIV is not the one that kills the person, but the inability to defend from diseases as a normal flu. AIDS has a great impact on our society, economy and many other things. We can clearly see that it effects our health and society, but I think that companies that sell condoms and medics that prolonging the life's of people infected by AIDS have an effect on scientists. The companies probably earn a lot of money and if we find the cure for AIDS the sale of condoms and those medics would dramatically fall. And today it is all about money, so AIDS have a huge effect on economy. One of the biggest problems today is finding the cure for AIDS, I think we are close to that moment, considering how developed our science is. This would be a great step for science and the whole world. But for now, protect yourself and others. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Marked by a teacher

    Osmosis Internal Assessment (Biology)

    4 star(s)

    Therefore, no anamolous results were removed from the processing of the raw data. However, there was a noticeable difference in the change in mass of the potato strips between those that has been left in the distilled water for 2 hours and 3 hours.

  2. Enzyme IA Biology

    Place a Hydrogen Peroxide filled test tube in the hand of the partner 2 who is holding the graduated cylinder underwater d.

  1. Biology Extended Essay 2009

    of fructose added to the juice as an artificial sweetener, where less is presented in freshly squeezed juice. 6. Cost comparison This is not related to the biological aspect of the research; however it gives a better overview of the consumption behavior of orange juice market in Melbourne.

  2. IB Genetic Unit Notes

    Therapeutic cloning is the creation of an embryo to supply embryonic stem cells for medical use. AGAINST FOR Human beings might be planned and produced with the sole intention of supplying 'spare parts' for a related human being with some passing health problem.

  1. IB Biology notes on infection and the body's responses.

    allows scientist to "harvest" a substantial amount of a single antibody 3. antibodies obtained from the blood are called polyclonal antibodies B. Production of monoclonal antibodies *K�hler and Milstein devised this technique for mice in 1975 and won a Nobel Prize http://www.accessexcellence.org/RC/VL/GG/monoclonal.php Here is an animation of monoclonal antibody production: http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::640::480::/sites/dl/free/0073532223/811363/Monoclonal_Antibody_Production.swf::Monoclonal%20Antibody%20Production 1.

  2. LAB-What infuences blood pressure

    103 + 56,8 164 64 105 65 105 65 104 + 72,6 194 75 + 125 85 120 80 105 + 73 168 77 135 85 135 85 106 + 74,5 183 82 125 80 120 80 107 + 69,1 183 78 140 85 145 85 108 + 58,5 166

  1. extended essay

    This meaning that sexual reproduction is being replaced by new commercialized reproduction, this rotating around a sale of desired genotypes. Many critics were concerned by the appearance of unauthentic websites that would offer cloned copies of famous celebrities. One might think that mass commercialized reproduction is not possible, but what

  2. Should Animals have the same rights as Humans? Both animals and humans exhibit behaviours ...

    Even the tiniest amount of this compound made male moths beat their wings furiously in a "flutter dance" demonstrating that the males had sensed an attractant. Their antennae are so sensitive it is claimed they can detect the pheromones from over 7km away.

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