Chapter 6 Flashcards
A complete virus particle is called a
virion
Glycoprotein spikes protruding from the outer surface of viral envelopes function as
factor that binds to host cells
In an enveloped virus, the part of the virus including the nucleic acid genome and the surrounding protein coat but not the envelope is called the
nucleocapsid
Most envelope viruses use what part of the host as their envelope source
plasma membrane
Nonenveloped viruses most often gain access to eukaryotic host cells by
endocytosis
endocytosis
Some complex viruses have icosahedral symmetry in the head region and helical symmetry in the tail. Overall, these viruses are said to have what kind of symmetry.
binal
The nucleic acids carried by viruses usually consist of
either DNA or RNA
The protein coat surrounding the viral genome is called the
capsid
The simplest viruses consist of
RNA or DNA in a protein coat
Two major types of symmetry found in viruses include
icosahedral and helical
Viral capsid protein subunits are called
protomers (capsomeres)
Viral capsids are generally constructed without any outside aid once the subunits have been synthesized. This process is called
self assembly
Viral envelopes are composed of
proteins
viroids
short infectious single-stranded RNAs that can infect some plants
Which of the following is not true of viruses?
Viruses replicate by binary fission
