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An infectious agent consisting of a protein is a prion. This is a mis-folded protein. It can cause several central nervous system diseases including Creutzfeldt-Jakob Disease, Fatal Familial Insomnia and Kuru in humans. Spongiform Encephalopathy in cows, mink, and cats plus Scrapie in sheep.
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Which of these is an infectious agent composed of a simple strand of RNA with no protein component viroid vector prion virus?
An infectious agent consisting of a protein is a prion. This is a misfolded protein. It can cause several central nervous system diseases including Creutzfeldt-Jakob Disease, Fatal Familial Insomnia and Kuru in humans, Spongiform Encephalopathy in cows, mink, and cats plus Scrapie in sheep.A VIROID consists only of a minuscule circular RNA molecule, lacking the protein coat of a virus. Viroids appear to be transmitted mechanically from one cell to another through cellular debris. They infect only plants. Viroids are common plant pathogens which cause severe economic problems.A vector is something that carries something else. Like the bacteria on our hands or the ones on the feet of flies.A virus is much more complicated than the viroid or prion and has DNA or RNA (not both) as their genetic material with a protein coat surrounding them.
What organic molecules exist in all viruses?
Nucleic acid (varies) and protein.Other infectious particles includes viroid, where there is only a tiny RNA used for infection, and prions, which is an infectious protein.
Why are prions unlike any other infectious disease?
They contain only protein and no nucleic acids
vruse are dna and rna?
Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins.
The smallest protein consists of about how many amino acid units?
Ever wonder what the smallest protein is? Apparently it's TRP-Cage, a protein with only 20 amino acids derived from the saliva of Gila monsters.
What is a biological particle composed of a nucleic acid core and a protein cover called?
If it consists only of these two components it is a virus.
What infectious agents is not living?
Viruses are the only non-biological infectious agents; all otheres are forms of pathogen, which are bacteria.
Can a carrier only be a human?
No, a carrier is defined as a human or animal that harbors an infectious agent without showing signs of a disease and can infect others.Examples: bats & rabies; cats & toxoplasmosis (in their feces).
What infectious agent live only by invading cells?
strict pathogens like Spirochetes only can live in host due there short genome
What is the differet between virus and virod?
Virus is a small infectious agent that replicates only inside the living cells of other organisms Virus can infect all type of life form such as animal ,plant and microorganism ,bacteria and archaea Viroid are a smallest infectious pathogens known but larger only prions Viroid can infect mostly plant pathogens
Does an infectious disease spread only by bacteria?
Infectious diseases spread when bacteria or viruses move from the carrier to others.
Which is the smallest virus infecting human beings?
The human rhinovirus, the virus that causes common colds, is the smallest human-infecting virus, with an average diameter of about 30 nanometers. Other viruses such as smallpox are around 10 times larger, at 300 nanometers.
