• 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...

Introduction

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.

Middle

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.

Conclusion

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

    Referring to Appendix A, The price of the pasteurized orange juice is mostly more expensive than the reconstituted ones due to the use of the juice from frozen concentrate is less costly than juice squeezed directly from the orange fruits.

  2. IB Genetic Unit Notes

    Many believers consider that cloning is against the will of god Human inventiveness must not tamper with 'nature', regarding human life issues. All new developments take time for acceptance. Most improvements in medical technologies have received trenchant opposition which has receded with familiarity, and as the advantages are perceived.

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

    B lymphocytes, usually from mice are exposed to a particular antigen 2. activated B lymphocytes are fused with myeloma cells/bone tumour cells/cancerous B cells that divide indefinitely 3. fused cells are called hybridomas because they are hybrids, one of the cells used was cancerous, thus the "-oma" part of the name C.

  2. extended essay

    The Diploid DNA is then inserted from the somatic cell into the human egg cell. This procedure is also known as SCNT, which means somatic cell nuclear transfer. After this transfer occurs the egg becomes diploid, in other words it now contains two DNA traits, which are essential for the formation of a human being; and becomes an embryo.

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

    In this kind of mating system both parents are usually involved in looking after the offspring. In polygamous mating systems (where an individual mates with several partners) males are not usually involved in parenting. Parenting behaviour is found most commonly in vertebrates such as mammals, birds and some reptiles.

  2. LAB-What infuences blood pressure

    166 70 122 70 123 70 120 + 56,2 170 63 166 72 116 74 121 + 72,2 176 80 149 89 139 80 122 + 55,2 165 65 123 74 118 69 123 + 53 169 64 136 78 122 72 124 + 67,2 167 78 154 87 147

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