april Flashcards
infections can be caused in __________ ways
several
how is it called any desease-causing agent?
pathogen
what is a virus made of?
DNA or RNA and a protein coat
what is a viroid made of?
a single-stranded RNA
virus can only infect______
animals
viroids can only infect_______
plants
how do virus are transmitted?
by ANY boady opening ;)
how does viroids are transmitted?
by seeds or pollen
what is a prion made of?
proteins, ONLY proteins
what does prions cause?
misfolding in other proteins that result in diseases on the brain
viruses have a _______ structure
simple
what materials does a virus include?
genetic material, caspid, (a protein shell)l, and maybe a lipid envelope(a protective outer coat)
what does bacteriophages do?
infect bacteria
what are the 2 types of bacteria infections
lytic and lysogenic
how does the lytic infection occur?
suddenly
how does lysogenic infection occur?
slowly
how can some viral diseases be prevented?
with vaccines
give 4 examples of viral infections
common cold, influenza, SARS, and HIV
what does vaccines do?
prepare the immune system for future attack
are the only way to control the spread of viral diseases?
vaccines
what does bacteria and archaea have in common?
they both are single celled prokarytes
what does oxygen do to obligate anaerobes?
kills them
what happens y an obligate aerobe runs out of oxygen?
it dies
are the prokatyotes that can live with or without oxygen?
facultative aerobes