NURSING EXAM QUESTIONS
MICROBIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
the virus must be inside a living cell
|
|
|
the virus must produce a toxin
|
|
|
the virus must be a pathogen
|
|
|
the virus must be transferred to a hard surface
|
Detailed explanation-1: -As obligate intracellular parasites, viruses require cell in which to replicate. The cells must express appropriate receptors and other proteins required by the virus. Cultured cells are often used to study basic steps in virus replication.
Detailed explanation-2: -The most simple viruses have only two parts: 1) a genome (DNA or RNA) that is a blueprint with instructions for making more viruses and 2) a capsid protein shell that protects the genome. Viruses also often have proteins called receptors that stick out of the shell, and help the virus sneak inside cells.
Detailed explanation-3: -Living things reproduce. Viruses must use host cells to create more virions. Since viruses don’t have organelles, nuclei, or even ribosomes, they don’t have the tools they need to copy their genes, much less create whole new virions.
Detailed explanation-4: -Viruses are microscopic biological agents that invade living hosts and infect their bodies by reproducing within their cell tissue. Viruses are tiny infectious agents that rely on living cells to multiply. They may use an animal, plant, or bacteria host to survive and reproduce.