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Bacteriophages are viruses that attack and destroy?
Bacteria by injecting their genetic material into the bacterial cells, which causes the cells to produce more viruses until they burst, releasing new viruses to infect other bacteria. Bacteriophages are being researched as a potential alternative to antibiotics for treating bacterial infections.
Why did it take so long to identify and understand viruses?
Identifying and understanding viruses took time because they are much smaller than bacteria and cannot be seen with a light microscope. It wasn't until the development of electron microscopes in the 20th century that viruses could finally be visualized. Additionally, viruses can only replicate inside host cells, making them difficult to study and understand.
Who is experiment demonstrated that DNA is the molecule of heredity?
The Avery and Hershey-Chase Experiments • Alfred Hershey and Martha Chase provided the final experimental evidence that pointed to DNA as the hereditary material the team studied viruses that infect bacteria -the structure of these viruses is very simple: a core of DNA surrounded by a coat of protein -the viruses attach themselves to the surface of bacteria cells and inject their genes into the interior • the infected bacterial cell is then forced to make hundreds of copies of new viruses, which then burst out of the cell to infect new cells. • Hershey and Chase used radioactive isotopes to "label" or tag the DNA and the protein of the viruses -some viruses were grown so that their DNA contained radioactive phosporous (32P) -other viruses were grown so that their protein coats contained radioactive sulfur (35S) After the labeled viruses were allowed to infect bacteria, only the viruses with 32 P had labeled tracer in their interior • The conclusion was that the genes that viruses use to specify new viruses are made of DNA and not protein
What distinguishes viruses from other microbes?
A virus does not have a cell membrane, as most all other living things. So some biologists do not consider them to be alive. The way a virus works is by hijacking a cell, either in a single cell bacteria or cells of a multi-cellular organism. It gets inside the cell membrane and then attacks the mitochondria, which are the energy units inside cells. Then it uses the cell's energy and resources to replicate itself, thereby killing the cell. There is treatment for some types of virus, like the flu virus.
What is a type of infection in which the host cell bursts and is destroyed?
A type of infection where the host cell bursts and is destroyed is known as a lytic infection. This process is commonly associated with viruses that infect bacteria, known as bacteriophages, where they replicate inside the host cell until it bursts, releasing new viral particles to infect other cells.
Who determined the difference between viruses and bacterium?
Many people were involved. Since bacteria were easily seen with a microscope, they were studied first. Viruses were not seen until the electron microscope but it was know that somethings were causing disease that were not bacteria. Antony van Leeuwenhoek was the first to describe bacteria.
What is the big difference between viruses and bacteria?
Viruses are replication parasites that can do nothing until they take over a living cell. Bacteria are living cells.
Bacteriophages are viruses that attack and destroy?
Bacteria by injecting their genetic material into the bacterial cells, which causes the cells to produce more viruses until they burst, releasing new viruses to infect other bacteria. Bacteriophages are being researched as a potential alternative to antibiotics for treating bacterial infections.
Is viruses are smaller than bacteria?
yeah, viruses are smaller then bacteria . both of these are small and cannot be spotted by the naked eye. bacteria - they are single-celled organisms that can replicate themselves (duplicate themselves) viruses - in contrast, contain a piece of genetic material that is encapsulated by a protein coat (protected by a protein coat).
How does the electron microscope permit scientists to see viruses?
Viruses are very small and can be considered ultramicroscopic. We were not able to see them with the best light microscopes as we could bacteria (prokaryotes). We have to use an electron microscope to see them as they are that small. This was not available until recently.
Can parasites and virus grow in food?
no. . . Because parasites and viruses can only grow on living matters... There may be saprophytes and bacteria growing in your food. . . Even parasites and viruses can be there but can not grow. .
Which part of blood is responsible for fighting infections?
White blood cells, specifically neutrophils, lymphocytes, monocytes, eosinophils, and basophils, are responsible for fighting infections in the body. These cells help identify and destroy pathogens like bacteria, viruses, and other harmful invaders to maintain overall immune health.
Can you scan your PC for viruses while on-line?
yes, you can do a virus scan while you are connected to the internet, but it is less effective to do so as some viruses can attack files that have already been scanned in the process, these viruses would not be found until the next scan, or until they crash the computer, which ever came first.
Which microbe can be killed by antibiotics?
A microbe is basically something you that can only be viewed under the microscope. As a virus is a microbe, you have your answer. Viruses infect a cell, then force it to make copies of itelf until the cell dies. Because of this, antibiotics for them are incredibly hard to make, because to kill the viruses inside the infected cell, the cell too must be destroyed.
Why did it take so long to identify and understand viruses?
Identifying and understanding viruses took time because they are much smaller than bacteria and cannot be seen with a light microscope. It wasn't until the development of electron microscopes in the 20th century that viruses could finally be visualized. Additionally, viruses can only replicate inside host cells, making them difficult to study and understand.
What infectious agents is not living?
Viruses are the only non-biological infectious agents; all otheres are forms of pathogen, which are bacteria.
Is a virus or bacterium larger?
A bacterial cell is a single-celled organism, but a virus is just a protein wall containing DNA or RNA, which it injects into the nucleus of a cell to cause it to start replicating the virus's NA rather than the cell's own. Bacteria are large enough to be seen with optical microscopes, but virus's are so small they weren't discovered until electron microscopes came along. Bacteria are alive and virus's are not. Bacteria can be killed and therefor cured. Virus's live in the blood and they can be treated but not cured and it could always show itself again. bacteria are cellular form of life, bacteria can be good or bad. Good bacteria in intestines which help digestion, bad bacteria such as pathogens are able to reproduce on their own. Virus's are pathogenic, virus's are not cells, and they reproduce by taking over cells.
