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Viruses (biological)
A virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses display a wide diversity of shapes and sizes, called morphologies. Generally viruses are much smaller than bacteria. Most viruses that have been studied have a diameter between 10 and 300 nanometres.
1,710 Questions
What is the effect of human civilizations on cartography?
I'm assuming you mean the effects of civilization on GEOGRAPHY. Cartography is the study of map making. Geography influenced civilization by isolating, protecting, bringing forth vulnerabilities, destroying places, et cetera. There have been famous Roman battles won or lost simply because of the Geography of the Mediterranean. Humans influence geography as well, cutting through mountains, straightening rivers, digging channels, erecting flood gates, all usually end of being negative to the environment. Coastlines, rivers, mountains and plains alike are not safe from the reshaping due to civilization. How civilization can influence cartography? I guess as civilizations grow, explorers learn more of the region and were able to map more accurately. But that's just a guess.
Can a cold virus invade a muscle cell?
No, typically cold viruses infect cells in the respiratory tract, such as the nose and throat, not muscle cells. Muscle cells do not provide the necessary conditions for a cold virus to replicate and cause infection.
Viruses are not an organism at all. They are not alive. They are not cells. They are nonliving. They are like cockle burrs that "grab" hold of your clothing or a dog's coat. They are hijackers. Once they get attached to the cell of a living cell, they can take it over and "make" the living cell produce virus particles instead of cell parts. These particles can assemble into more viruses and then they break out of the cell (killing it) and begin the process again. They cannot make more viruses on their own.
What are the effects of overheating or heatstroke on humans?
Heat stroke occurs when the core body temperature rises above 40.5C and the body's internal systems start to shut down. Normally, sweating helps to maintain a healthy body temperature by increasing heat loss through evaporation. When a person becomes dehydrated, they do not sweat as much, their blood becomes concentrated and organ functioning is impaired.
Deer ticks do effect humans. They can cause limes disease. A regular tick just bites and may cause a small sore at the bite site. You can google lime disease or ticks for lots of information. The problem with ticks is they winter over in the house and lay eggs for spring. You can see the little ticks in the corners of a window in the spring. Helen
Are cyanobacteria beneficial to humans?
cyanobacteria produces highly toxic blooms under particular conditions... however... through appropriate conditioning of the host to be... a symbiotic relationship can be established between humans, and chloroplast... if the questioner would like to know more... email realitydeviant77@hotmail.com
Technically, viruses are not alive, thus they are not a cell. You may be referring to the protein capsid in which the nucleic acid of the virus is enclosed in. The contents of the capsid may vary depending on the virus, but it can be ssDNA, dsDNA, ssRNA, or dsRNA.
Lysogenic and lytic viral stages?
Well im just going to type what it says in my book
In bacterial viruses, the cycle of the viral infection, replication, and destruction is called the lytic cycle.
During an infection, some viruses stay inside the cells but do not make new viruses. Instead of producing virus particles, the viral gene is inserted into the host chromosome and is called a provirus. Whenever the cell divides, the provirus also divides, resulting in two infected host cells. In this cycle, called the lysogenic cycle, the viral genome replicates without destorying the host cell. In some lysogenic viruses, change in the environment can causethe provirus to begin the lytic cycle, which means the destruction of the host cell.
I hope this helps ^.^ --Pengi-Chan
Cell in which a virus multiples itself?
A virus multiplies inside a host cell by taking over the cell's machinery to replicate its genetic material and produce more virus particles. This process usually results in the death of the infected cell as the newly formed virus particles are released to infect other cells.
I suppose this is just a grievous error on the AAMC MCAT. Viruses do have a protein coat similar to a cell wall, but obviously it is not called a cell wall.
Brief introduction of icosahedral structure of virus?
The icosahedral structure of a virus is a symmetrical arrangement of 20 equilateral triangles that form a roughly spherical shape. This structure is highly stable and efficient for packaging the viral genome within the protein capsid. The icosahedral symmetry allows viruses to maximize their genetic material while maintaining structural integrity.
Is Strongyloides a bacteria toxin virus parasite?
Strongyloides is a parasite, specifically a nematode roundworm that can infect humans and animals. It is not a bacteria, toxin, or virus.
Lipid Envelop. Thus, they are less subject to dessication, destruction in the G.I. and can survive outside of a host.
Why are viruses not considered living things?
Viruses do not have all of the characteristics of living things. They consist of a protein coat which contains either DNA or RNA. They are not made of cells. They have no cellular structures. They do not require nutrients. They do not have metabolism. They do not grow or develop. They do not reproduce on their own. They must high-jack a living cell, inject it's genetic material, which then takes over the host cell which then becomes a virus factory. Eventually the cell becomes so full of replicated viruses that they burst, releasing the viruses so they can go on to attack other cells.
A virus is not considered a living thing because it can't live on its own and has to rely on another animals cells to reproduce. A living organism technically has to be able to survive and reproduce on their own without help from other organisms. They don't use their own energy to grow, make food, take food, or produce waste.
Viruses are not considered living organisms because they are not composed of cells (the Cellular Theory of Life). Also, viruses cannot replicate independently - they must infect a living cell before their structure and genetic material can be reproduced and multiplied.
However, there is a vigorous ongoing debate about whether or not viruses are living - they do have discrete genetic material that is transmitted from "parent" to "offspring", they can react to the environment by changing what proteins they are expressing and some viruses are extremely complex.
One of the main reasons viruses are considered non living is because they cannot replicate by themselves. In order to replicate they must find a host cell and inject DNA into the host cell which disrupts the host cell's normal processes by causing it to make copies of the virus instead of carrying out all its normal processes. Once the viruses have been created inside the host cell, the host cell bursts to release the viruses. This is the same reason it is considered parasitic, since it uses the host cell for its benefit and damages or kills the host cell in the process.
Which microscope should be ued for a virus is 50nm in size and why?
A virus of 50nm would be too small to see unless an electron microscope was used because it has greater resolving power and a resolution up to .1nm. A microscope using compound light as the means of illumination could not resolve better than approx. 200nms.
What do organisms need to grow?
Organisms need nutrients, water, suitable temperature, and oxygen to grow. These factors provide energy, support cell growth and division, and enable biological processes to occur. Additionally, some organisms may require specific environmental conditions, such as light or pH levels, to thrive.
What is the name of the viriod responsible for cucumo virus?
The viroid responsible for cucumber pale fruit viroid (CPFV) infection in cucumbers is called the cucumber pale fruit viroid (CPFV). This viroid can cause symptoms such as yellowing, stunting, and distortion of leaves in infected plants.
What is the cell of an organism upon which a virus depends is?
That depends. All viruses have a marker that binds to a specific site on a cell. For example, HIV virus will only be infectious to humans because only humans possess a cell with the correct binding sites.
No one knows for certain, and there is much scientific debate on this issue. Some scientists have speculated that they might have been parts of parasitic organisms that got separated from the machinery for producing the rest of the cell and still managed to infect their hosts, their RNA/DNA being incorporated into the host cell and then being replicated by the host cell's own machinery.
What type of bacteria is in insulin?
Well, the insulin a diabetic gets does not contain any bacteria. It is sterile. However, the insulin is made by bacteria, usually E. coli. Hope this helps! Some Stuff about the E.Coli Bacteria:
• • The Bacteria E.coli used to produce insulin for those with diabetes • It's Inexpensive - compared with 1980 methods(extracting insulin from pigs etc.) • Large quantities of the modified bacteria are killed and insulin is extracted and purified. •The Bacteria E.coli used to produce insulin for those with diabetes
A pro virus is a a complete viral genome which is incorporated in a host's genome. It is dormant while incorporated and therefore passed on to that cell's "offspring" and is waiting to be expressed at a later time.
What is the difference between bacteria and viruses?
Bacteria are single-celled organisms that exist throughout the environment. They live in water, soil, and the air. Bacteria live in and on all animals and plants. Some cause disease, some are beneficial and some have no known impact on the animals they live on or in.
Viruses are DNA or RNA, sometimes wrapped in protein coatings. They cannot survive outside a living cell. Viruses cannot reproduce on their own. They use the mechanisms of the living cells they infect to reproduce themselves and in the process they can damage or destroy those cells, causing disease to the animal or plant involved.
Viruses are classified differently than living organisms, since they are not technically alive. In taxonomy, viruses are not assigned to a Domain, Kingdom, Phylum, Class, or Order. The influenza viruses start, in most classification systems, at the level of the Family. They are in the Family of Orthomyxoviridae. There are a few newer classification systems that have been developed to better categorize and classify viruses, but these are not yet the standard.
No. Not all cats have rabies. In fact, in the UK rabies is practically non-existent in pets. The only way a cat can have rabies is if it has not had vaccinations and is infected with a cat that has rabies.
What do you do when your cat has the flu?
how young is your kitten?and how bad do you think the cold is? if it is just a little cold you might be able to fix your little baby up at home but if not and if your kiten is whizing and has mucus coming from the nose and runny eyes you need to take it to the vet.and if your kitten is younger then 3 weeks you have to keep a very close eye on it to make sure it feeds and is not getting anyworse if it does take it striaght to the vet.
and if it is older like a month in age and up it would be easier to take care of by puting a thing called "upper respiratory remedy" i get the kind for ferrets because i own ferrets aswell as cats but you could probably get it at petsmart. all you have to do is dab alittle on its chest and a very small amont right above its little nose you should porbaly put it on the bedding and not directly on the kitten if it is younger then 3 weeks i would recommend taking it to the vet first but this should help it has helped alot of kittens my family has rescued.
i hope your little baby gets better all the best.
