Chapter 5: Viral Structure And Life Cycles Flashcards
Identify better terms for viruses than alive or dead.
Active or in active
Define capsid
A cell that surrounds the nucleic acid in the central core.
Envelope virus
Composed of a nucleocapsid surrounded by a flexible membrane called the envelope. The envelope usually has special receptor spikes inserted into it
Complex viruses
Found and viruses that infect bacteria, may have multiple types of proteins and take shape that are not symmetrical. They are never envelope.
What is the size range for viruses?
Around 20 nm which is equivalent to .02 micro molecules in diameter. They can be up to 450 nm which is equivalent to .4micro millimeters in length.
What are the basic structure of viruses
Said, envelope, nucleic acid’s.
What is obligate intracellular parasites?
Viruses that cannot multiply unless they invade a specific host cell and instruct it’s genetic and metabolic machinery to make an release quantities of new viruses.
