Essays Tagged: "Viruses"


ould be proven toregulate protein synthesis. (Miller, 139)DNA is the genetic material found in most viruses and in all cellular organisms. Some viruses do not haveDNA, but contain RNA instead. Dependi ... ein synthesis. Without RNA, thisprocess could not be completed. RNA is the genetic material of some viruses. RNA molecules are like DNA.They have a long chain of macromolecules made up of nucleotides. ...

(5 pages) 194 0 4.0 Jan/1996

Subjects: Science Essays > Genetics & Genome Projects


Aids first appeared in 1959. Its definition states that its any of a group of retroviruses and esp. HIV-1 that infect and destroy helper T cells of the immune system causing the marke ... led also AIDS virus, human immunodeficiency virus. A retrovirus is any of a group of RNA-containing viruses (as HIV) that produce reverse transcriptase by means of which DNA is produced using their RN ... a template and incorporated into the genome of infected cells and that include numerous tumorigenic viruses. During the 2000 year 5.3 million people were newly infected with HIV/AIDS. At the end of th ...

(3 pages) 101 0 4.1 Mar/2002

Subjects: Humanities Essays > Health & Medicine > Diseases

The Immune System

the body. Thesesubstances include disease-causing organisms, such as bacteria, fungi, parasites, andviruses. The body's ability to resist these invaders is called immunity. A key feature of theimmune ... gens or poisons invade the human body. Pathogens are disease-causing organisms such as bacteria and viruses. The immune system reacts to foreignsubstances through a series of steps know as the immune ...

(3 pages) 157 1 3.4 Oct/1996

Subjects: Humanities Essays > Health & Medicine


failing and that there disease is caused by one of the most contagious, dangerous and deadliest of viruses. These viruses that were initially concealed by flu like symptoms are now known collectively ... tis descries the destructive affect of the viral invasion of the body and liver by six and separate viruses. Each type of viral infection varies from one to another in degree of severity. The names of ...

(7 pages) 122 0 3.4 Nov/1996

Subjects: Humanities Essays > Health & Medicine > Diseases

Computer Viruses: Infection Vectors, and Feasibility of complete system protection.

one who has. And the rate of infection is rising monthly. This has caused a wide spread interest in viruses and what can be done to protect the data now entrusted to the computer systems throughout th ... operate the system, as even commercial products have been known to be shipped already infected with viruses.In conclusion, because a virus can enter a computer in so many different ways, perhaps the b ...

(2 pages) 88 0 4.7 Nov/1994

Subjects: Science Essays > Computer Science


of animals are afflicted with infections caused by a wide variety of organisms, from submicroscopic viruses to wormlike parasites. When a person has an infectious disease like mono the organism gains ... ongly influenced the course of history on Earth. The organisms responsible for human infections are viruses. Viruses are simple life forms consisting of nucleic acid, encoding genetic information, and ...

(3 pages) 54 0 3.0 Jan/1997

Subjects: Humanities Essays > Health & Medicine > Diseases

Viruses, Ebola

, and opportunities for genetic re-assortment Ebola Zaire is one of the most deadly and unforgiving viruses in the known world. A new family of viruses termed filoviruses, was first discovered in 1967 ... logy and with no known hosts, this virus could one day, become a world wide problem. Given that filoviruses with increased potential for rapid evolution, because of the high error rate of ribonucleic ...

(2 pages) 42 0 3.0 Mar/1997

Subjects: Science Essays > Biology

The Ebola Virus

llent work!The Ebola VirusDescriptions of the Ebola virus:The Ebola virus is a complicating object (viruses not beingconsidered living creatures, so it is an object). Named after the EbolaRiver, the E ... important technology that was used in the book was theelectron microscope. Without this instrument, viruses like Ebola wouldnot even be able to be seen or studied. It is a large piece of equipmentusin ...

(6 pages) 99 1 4.2 Jan/1997

Subjects: Science Essays > Biology


s does in two days what either of those takes years to accomplish. This is one of the most ruthless viruses known to man. It kills nine out of ten of its victims. There is no vaccine, no cure.A virus ... s active and can multiply hundreds of times, usually harming or destroying the host in the process. Viruses cannot live for long outside a cell. They must be carried inside the organism by some means ...

(5 pages) 87 1 4.6 Dec/1996

Subjects: Science Essays > Biology


PRIONSPrions have been a mistery for scientists from the day they where discovered. Prions act like viruses but they are not. Their structure and chemistry are unknown. They are believed to be protein ...

(7 pages) 70 0 3.5 Sep/1996

Subjects: Science Essays > Biology


la.There is no known cure for this disease(2).Ebola has become one of the most mysterious andfeared viruses onthe face of this earth. Ebola's first documented appearance was in Zaire in1976. Noone kno ... of a cure and an origin, there have beenseveral teams of scientistswhose top priority is to find theviruses origin(5). The teams have trekked through the rainforestsof Africa to collecting different s ...

(4 pages) 35 0 3.0 Jan/1997

Subjects: Humanities Essays > Health & Medicine > Diseases

Preventing and Epidemic, a comparaison and contrast essay in MLA format.

ul sunsets, exotic scenery, exciting new cultures, and oh yeah, two of the most deadly hemmorrhagic viruses known to man. With this overlay it can be hard to realize that this mysterious place can be ...

(3 pages) 45 0 3.0 Dec/2002

Subjects: Humanities Essays > Health & Medicine

Computers and the Law

rime, obviously involves using a computer, can be in the form of hacking, software piracy, planting viruses or storing/distributing inappropriate pornographic images to name just a few. Below and in t ... ree major criminal offences which now make it possible to deal with digital crimes such as hacking, viruses and other nuisances. The offences are:Unauthorised access to computer programs or data; is c ...

(10 pages) 473 5 4.9 Dec/2002

Subjects: Science Essays > Computer Science > Computer Ethics

The Ebola Virus. In depth research paper about the Ebola Virus. Disscusses infection, spread, mortality rates, different strains and outbreaks.

The ebola virus is a very complex level four virus. Level four viruses are extremely lethal, and there is no cure for them yet, not does there seem to be a cure fo ... e a cure for them or ebola in the near future. To give you an example of just how lethal level four viruses like ebola are, AIDS is only a level three virus, and requires minimal protection when worki ... takes place. The virus is a member of the family filoviridae. In this family, there are only three viruses that apply, and they are all practically identical, with only one thing that distinguishes t ...

(5 pages) 223 1 4.5 Dec/2002

Subjects: Science Essays > Microbiology

Computer Security

ctual installation of the computer. The programs have to be kept off the computer.The attackers use viruses they send through emails. If we read this email we activate the virus. The attacker then ins ...

(5 pages) 257 0 4.8 Mar/2003

Subjects: Science Essays > Computer Science > Computer Ethics

Defenses of human immune system and how they are influenced by hereditary genetics.

hereditary traits. The immune system is the body's defense against pathogens, such as bacteria and viruses. The immune system is a two-part defense mechanism, with specific and non - specific defense ...

(3 pages) 67 0 4.0 Apr/2003

Subjects: Science Essays > Biology > Human Biology

Living Drugs: application of genetically modified viruses in cancer treatment.

Living Drugs: application of genetically modified viruses in cancer treatmentUnlike any other families of organisms which may be beneficial or even es ... hnology, we can expect to create biological therapeutic agents from genetically modified strains of viruses that can overcome difficulties and side effects of existing chemo-therapeutic agents for can ... tack certain weaknesses of carcinogenic cells and efficiently preventing them from causing sickness.Viruses are the only obligate parasitic organisms without their own metabolism, some even regard it ...

(5 pages) 104 0 3.0 Apr/2003

Subjects: Science Essays > Biotechnology

Diseases and the Immune System.

at the disease and this is when doctors prescribe antibiotics and other medicationsHow bacteria and viruses enter the human body.There are a number of ways in which diseases enter the human body. Bact ... nter the human body.There are a number of ways in which diseases enter the human body. Bacteria and viruses can be airborne(droplet) and enter the body through our respiratory system eg the flu or the ...

(3 pages) 78 0 3.7 Jun/2003

Subjects: Humanities Essays > Health & Medicine > Diseases

Biology notes on viruses.

Notespg. 455-461Biologists first suspected the existence of viruses near the end of the nineteenth century. At that time, European scientists were seeking to id ... cells it infected. They called the agent a virus, a Latin word meaning "poison."The true nature of viruses was discovered in 1933 when the biologist Wendell Stanley of the Rockefeller Institute tried ... cased in a protein coat that can infect cells and replicate within them. Biologists do not consider viruses to be living organisms.Most viruses have a protein sheath, or capsid, surrounding a core of ...

(5 pages) 79 1 3.2 Aug/2003

Subjects: Science Essays > Biology

Biological Weapon Effects on Biological Diversity.

ed bioweapons facilities and arsenals is in the range of $10,000 to $100,000" (Dudley 590). Natural viruses are readily and inexpensively available and have just as much capability as other viruses to ... ological weapon would be one that is exigent and at times impossible to eliminate. Reoccurrences of viruses such as anthrax, bovine tuberculosis and rinderpest, have made it difficult for species to r ...

(2 pages) 61 1 4.8 Oct/2003

Subjects: Science Essays > Environmental Science