THE MOLECULAR BASIS OF INHERITANCE
VIRUSES AND PRIONS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
true
|
|
|
false
|
Detailed explanation-1: -Some viruses are restricted in the kinds of cells in which they replicate, and a few have not yet been cultivated at all under laboratory conditions. However, most viruses are grown in cultured cells, embryonated hen’s eggs, or laboratory animals.
Detailed explanation-2: -Viruses cannot be grown in standard microbiological broths or on agar plates, instead they have be to cultured inside suitable host cells.
Detailed explanation-3: -This is because they use all of the host cell’s DNA replication mechanisms to replicate, or make copies of their own RNA / DNA, to make many new identical viruses. This is why we cannot grow them in the lab. They do not grow on agar plates.
Detailed explanation-4: -Viral culture is a laboratory technique in which samples of a virus are placed to different cell lines which the virus being tested for its ability to infect. If the cells show changes, known as cytopathic effects, then the culture is positive.