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- Adenovirus.
- Arbovirus (encefalitis)
- Arenaviridae.
- Baculoviridae.
- Virus Definition
- Virus Structure
- Is A Virus Living?
- Virus Classification
- Examples of A Virus
- Quiz
A virus is a chain of nucleic acids (DNA or RNA) which lives in a host cell, uses parts of the cellular machinery to reproduce, and releases the replicated nucleic acid chains to infect more cells. A virus is often housed in a protein coat or protein envelope, a protective covering which allows the virus to survive between hosts.
A virus can take on a variety of different structures. The smallest virus is only 17 nanometers, barely longer than an average sized protein. The largest virus is nearly a thousand times that size, at 1,500 nanometers. This is really small. A human hair is approximately 20,000 nanometers across. This means that most virus particles are well beyond ...
This is a complicated question. A cell is considered to be living because it contains all the necessary components to replicate its DNA, grow, and divide into new cells. This is the process all life takes, where it is a single-celled organism or a multi-cellular organism. Some people do not consider a virus living because a virus does not contain a...
Scientists classify viruses based on how they replicate their genome. Some virus genomes are made of RNA, others are made of DNA. Some viruses use a single strand, others use a double strand. The complexities involved in replicating and packaging these different molecules places viruses into seven different categories. Class I virus genomes are mad...
Polio Virus
The Polio virus, which crippled President Franklin Roosevelt, is a Class III virus. This double-stranded RNA virus encodes for 12 proteins. Like other Class III virus genomes, it reproduces by releasing mRNA strands into the cytosol of host cells, which code for new virus molecules. Interestingly, the polio virus was not deadly, until people started treating their water. Before chlorinated water, polio survived in most water sources. Thus, most infants were exposed to polio right off the bat....
Rabies Virus
The rabies virus is a Class V virus, with a bullet-shaped protein coat. This virus is made of linear, single-stranded RNA. The rabies virus genome codes for five proteins, from 12,000 nucleotides. Interestingly, the symptoms of rabies in many animals include increased aggression. This trait, caused by where the virus attacks and the damage it does, causes animals to bite other animals more often than they normally would. The assembled rabies virus particles accumulate in the saliva. Thus, whe...
1. Which of the following classes of virus genome can be reproduced directly by cellular machinery? A. Class I B. Class III C.Class VI 2. Human Rhinovirus A causes the common cold. The genome of rhinovirus is a single-stranded RNA, similar to mRNAs produced by the host cell. Which class does rhinovirus belong to? A. Class VII B. Class II C.Class IV...
10 Ejemplos de Virus. En biología, los virus son microorganismos más pequeños que las bacterias y que, al ser capaces de propagarse en el interior de la humanidad y de especies animales y vegetales, e incluso en las bacterias, provocan infecciones que pueden tener efectos muy variados, de leves a devastadores.
A virus is an infectious particle that reproduces by "commandeering" a host cell and using its machinery to make more viruses. A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope. Viruses are very diverse.
- No, because they are not living things. Good question, though.
- Another aspect is that we are constantly running into new viruses. Why? Viruses can be divided into two groups: one group of viruses spreads only b...
- This is an excellent question and is the subject of current scientific research! Short answer — we don't know and the answer may be different for d...
- I think "chemical unit" is the wrong phrase to use here. A simple stone or pebble at a microscopic scale can be compared to a rough mountain range...
- It would be possible, but not practical. Having free roaming proteins in your body to attract viruses is like having pools of acid in the ocean to...
- No, viruses do *not* have that trait of living organisms - growth and development. Viruses only reproduce - if they find host (cell). Do viruses di...
- No the scientific community is split on whether a virus is alive or not but freezing a sample will actually preserve it. Researchers have found and...
- Viral infections are hard to treat because viruses live inside your body's cells. They are "protected" from medicines, which usually move through y...
- So they can attach to the host as stealthily as possible. Too large of a pathogen could alert the immune system to a threat before the virus even g...
- From What I can gather, according to this:https://www.ncbi.nlm.nih.gov/pubmed/203115, Hydrogen peroxide can make viruses inactive.
18 de jun. de 2024 · Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. Viruses possess unique infective properties and thus often cause disease in host organisms. Learn about the history, types, and features of viruses.
- A virus is an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.
- A virus particle is made up of genetic material housed inside a protein shell, or capsid. The genetic material, or genome, of a virus may consist o...
- Most viruses vary in diameter from 20 nanometres (nm; 0.0000008 inch) to 250–400 nm. The largest viruses measure about 500 nm in diameter and are a...
- Shapes of viruses are predominantly of two kinds: rods (or filaments), so called because of the linear array of the nucleic acid and the protein su...
- When some disease-causing viruses enter host cells, they start making new copies of themselves very quickly, often outpacing the immune system’s pr...
29 de mar. de 2023 · Viruses are small germs (pathogens) that can infect you and make you sick. They can infect humans, plants, animals, bacteria and fungi. Each one infects only specific types of hosts. Viral infections in humans can cause no symptoms or make you extremely ill. Types of diseases they can cause include:
19 de oct. de 2023 · In humans, viruses can cause many diseases. For example, the flu is caused by the influenza virus. Typically, viruses cause an immune response in the host, and this kills the virus. However, some viruses are not successfully treated by the immune system, such as human immunodeficiency virus, or HIV.
