Viruses are important to discuss because they are analyzed in almost all microbiology classes. Viruses can be characterized as, “any of a group of submicroscopic entities consisting of a single nucleic acid chain surrounded by a protein coat and capable of replication only within the cells of living organisms” (Biology). Bacteriophage are more specific in a sense that they are “a virus that infects and replicates within a bacterium” not just any living organisms cells (Biology). These viruses can replicate in 2 different cycles: lytic cycle or the lysogenic cycle. If a virus takes enters the lytic cycle it will cause infection and destruction of the host cell. This is done when the virus first penetrates the cell membrane of the host cell.
Viruses have been long considered to be a living organism. They have their own DNA which makes it a debatable issue of whether or not to categorize them as living. They require energy to replicate/ survive within a host cell and so they take control of various organelles including mitochondria. [1]
The word virus comes from the Latin word, poison. A virus infects a cell and into it, inserts its DNA. The virus then multiplies inside the cell and when enough of the virus has been produced, the newly formed viruses will break out into the body of the host, destroying the cell in the process. Variola major and Variol...
consists of a polyhedral head and a tail. The tail is used to inject DNA into a
Bloodborne pathogens are viruses that deteriorate cells within the body. A virus is a submicroscopic parasitic organism that feeds on cells. Viruses are dependent on cells for their nutrients so the virus survive and reproduce. Every virus consists of either deoxyribonucleic acid (DNA) or ribonucleic acid (RNA). A virus can contain a strand of one or the other, but not both. This RNA or DNA is contained within a protein shell for protection. A virus is a parasite that is dependent upon cells for metabolic and reproductive requirements. By using the cell the virus makes the host very ill by redirecting cellular activity to make more viruses.
Viral infections are caused by different kinds of viruses. They have a simple structure and are tinier than bacteria by a landslide. Viruses can only survive in a host, and are unable to reproduce by themselves, instead they use the host’s DNA to multiply and repair. Most viruses are harmful to the human body and cause disease. They direct themselves to infect the cells in the liver, respiratory system, and blood. Which cause diseases like the flu, chickenpox, Aids, herpes, etcetera. Viruses are also involved in many forms of cancer. They
Then it enters into the host by exchanging its DNA or RNA. The virus then
Viruses are the simplest and tiniest of microbes, and are made up of proteins, nucleic acid, and lipids. The nucleic acids contain the genetic code that helps them grow and reproduce, but only once they find their way into a living organism. Viruses themselves are not considered living organisms because they don’t have cells, they don’t metabolize nutrients, produce and excrete wastes, and they can’t move around on their own. The remains of the nucleic acid then forms a covering, called the capsid. Once the capsid gets removed, viruses use the building materials of th...
Bacteria, viruses, and prions all have different types of structures. However, bacteria and viruses are more alike in the aspect of nucleic acid. Bacteria come in numerous shapes, but most bacteria are in the shape of a sphere (cocci). Their other shapes, or structure, are rods (bacilli), spirals (spirilla), and if they’re rigid then they are called spirochetes. Bacteria will normally come in a single cell form; however they can come in more than one, and they can also form chains. A bacterium doesn’t contain a nucleus because they are prokaryotes. On the other hand, it does have nucleic acid. The nucleic acid lies in the nucleoid plasmids. Bacterium doesn’t have membrane-bounded organelles and an outer cell wall. The outer cell wall is strengthened by peptidoglycan, which protects the bacteria from collapsing or bursting. Some bacteria have the means to move. The reason they’re able to move is because they have flagella. Flagellum is a long slender tail-like structure. Virus’s structure is less complex than the structure of bacterium. All viruses are composed of two parts: the outer capsid, and the inner core. The outer capsid is made of protein subunits, and the inner core contains the DNA. Also with virus structures comes the envelope. The envelope is part of the host’s plasma membrane...
...ving things carry viruses in their cells. Even fungi and bacteria and inhabited by viruses and are occasionally destroyed by them. A virus makes copies of itself in a cell until eventually the cell gets pigged with virus and pops and the viruses spill out of the broken cell. If enough cells are destroyed, such as they do in the case of Ebola, the host dies. A virus does not "want" to kill its host. That is not in the best interest of the virus, because then the virus may also die, unless it can jump fast enough out of the dying host into a new host.
...y do not have energy metabolism, they do not grow or produce waste products, and they don’t respond to stimuli. Although they replicate and produce more of one another, viruses can’t reproduce independently without invading a living cell. Because viruses don’t fulfill all of the characteristics of life, they are not living organisms.
Viruses can do many different things to a body, they can destroy, corrupt, and take over cells in the body. They can damage parts of the body or make your body destroy itself, viruses are dangerous but sometimes can be cured. Viruses do not have the enzymes needed to carry out life so they use other’s cells, called a host cell, to live and to perform their functions, such as reproduction. Viruses inject their genetic instructions into a cell causing the cell to create viruses materials, which become new viruses, and usually break the side of the cell destroying it. The viruses can cause parts of the brain to react and activate, causing behavioral changes. For example a disease called Toxoplasmosis can alter rat behavior, while it affects humans in a different way than rats, its an example of what viruses can do. The virus switches the triggers that causes neuronal reactions for fear and arousal, so that what causes fear actually cuses arousal. This is so that the rat gets eaten by a cat and a parasite (which injects the virus) inside the rat can reproduce in a cat. A virus doesn’t simply just head to the brain to cause these things, as there is a “shield” around the brain that protects it from everything. This “shield” is called the Blood Brain Barrier, the BBB, which molecul...
You may think Vaccinations aren’t important, but they are. One reason they are important is because by not getting vaccinated, you could be at risk of serious diseases. These diseases can include influenza, pertussis, and shingles. Another reason would be because you could increase the risk of complications such as a chronic heart disease or a weakened immune system. Also it’s important because no one has the time to get sick or ill. The last one is that you can reduce the chance of passing serious diseases to others.
Virus- An infectious agent found in virtually all life forms, including humans, animals, plants, fungi, and bacteria. Viruses touch us every day through water, food, physical contact, blood, animals, or even, the air you breathe. All though most are harmless there are some that...
Influenza is a very serious disease that can lead to hospitalization and even fatalities. There are many different strands, infecting people of all ages and originating from different animals, which can be extremely fatal if the right care isn’t provided. Care for flu patients have changes tremendously over the years from once having no vaccine to having a limited amount of vaccines, only for the most prone individuals, to now having yearly vaccines to prevent the most common cases of flu. Doctors have learned just how deadly the flu virus can be which has led to the importance of them educating their patients of the flu virus and explaining the importance of getting the vaccine in order for their bodies to get an immunity of the many flu viruses that many in our country have previously faced. Many in our county in the past have died from the H1N1 virus due to no vaccines, poor precautions, and being uneducated on the virus because it was new, but new vaccines and precautions are being taken in order to prevent pandemics such as the Flu Pandemic of 1918.
Virus cells often consist of just a nucleic acid either DNA or RNA in a protein capsule. Viruses are considered neither prokaryotes nor eukaryotes because they lack the characteristics of living things, except the ability to replicate (which they accomplish only in living cells).