Asked in BiologyCell Biology (cytology)
Cell Biology (cytology)
What happens when bacteria injures host cells?
Asked in Genetics
Parasytic bacteria depend on eukaryotic host cells of what?
Asked in Biology, Cell Biology (cytology)
Parasytic bacteria that depend on eukaryotic host cells are?
What are these molecules called that protect potential host cells?
Most antibiotics kill invading bacteria while minimally harming the host by?
Which is the difference between bacteria and viruses that shows that bacteria are living organisms and viruses are not?
Asked in Viruses (biological)
Why can bacteria be grown in a petri-dish but not possible for viruses?
Asked in Microbiology
Why is a lysogeny advantageous to a bacteriophage?
Asked in Biology, Microbiology, Bacteria
What is it called when bacteria does not hurt its host?
How and why do pathogenic bacteria enter host cells?
Pathogenic bacteria enter host cells basically for "food and shelter", and to hide from the host's immune system. Under normal circumstances, the phagocytic cells of the immune system engulf the bacteria and/or tag them for destruction by other means. This keeps the bacteria away from other cells. Studies indicate however, that pathogenic bacteria enter non-phagocytic cells via receptor-mediated endocytosis. The bacterium has a surface protein that a protein on the host cell recognizes. The cell is then fooled into believeing that the bacterial protein is one that needs to be destroyed or recycled. Since the cell's protein destruction machinery is inside the cell, it brings the bacterium into the cell via endocytosis. And the rest is history!
Asked in Viruses (biological)
What effect a virus have in the lytic cycle have on an organism?
Asked in Science, Conditions and Diseases, Genetics
What happens when bacteriophage infects a bacteria cell?
What difference between bacteria and viruses shows that bacteria are living organisms and viruses are not?
Asked in Health, Immune System
What kills cells infected with pathogen?
It depends on the pathogen. If it is a virus, the virus will replicate (reproduce its DNA) inside the cell (known as a host cell). The virus clones will then leave the cell and in doing so, cause the cell to die. When this happens many many times, lot of the cells of a tissue die and the tissue itself will start to fail. If it is a bacteria, the bacteria release toxins (endotoxins) which kill the cells directly (from outside).
Asked in Genetics
Can cells survive without cell organelles?
Primordial bacteria have no organelles. They represent the stage of evolution before organelles were acquired. Organelles (probably) began as infectious bacteria invading ameoba-like cells. If the host didn't kill them off and they didn't kill the host then the bacteria become a sort of parasitic organelle. These can be removed without too much harm to the host. In fact the host would probably benefit by their removal. If the parasitic bacteria them started to provide some service to the host cell then the host benefits from their presence. If the service they provide duplicates some basic process of the host then the host will 'forget' how to do the service itself and rely solely on its (now) symbiotic organelles. This is a very common facet of living things: if you don't use a certain ability then you lose it. Removal of the organelles at this stage would be fatal to the host.
Asked in Genetics, Science Experiments
How does the bacteria infect a host?
when the bacteria enters the host it finds a target cell... it will then attach to the target cell and inject its DNA into the cell destroying the cells actual DNA.... so when the cell makes copies of what it thinks is its DNA it is really producing more bacterial DNA and it will destroy more cells until antibiotics are ingested
How do viruses reproduce compared to bacteria?
Viruses replicate inside body cells, using the host cell to do the work and provide the materials for reproduction. Bacteria reproduce outside body cells and, since, unlike viruses, they are living organisms, bacteria are able to do the work and production of new bacteria without a need for a host. A description of the 'Lytic Cycle', the process that some types of viruses follow in reproduction, is given in the related questions below for more detail of the process of reproduction of some viruses inside body cells.
Asked in Health, Microbiology, Chlamydia
How is a virus different from chlamydia?
Chlamydia is a prokaryote or bacteria. Bacteria are living organisms, capable of their own metabolism and reproduction, even though they may infect host cells. Viruses are not alive. They are chemical constructs that require a host cell for metabolism and reproduction. Viruses have many of the same processes found in living cells, but they lack key metabolism and biochemistry that prevents them from functioning outside of a host cell.