Flashcards in Exam 1 Part 5 Deck (54)
What are the 3 eukaryotic microbes of clinical interest?
protozoa, fungi, and parasitic helminths
T/F: Eukaryotes can reproduce either sexually or asexually. Some even do both.
T/F: Protozoa typically lack a cell wall.
T/F: Most protozoa are pathogens
False; very few are
What kind of environment is required by protozoa?
How do most protozoa reproduce?
T/F: all protozoa produce trophozoites.
T/F: all protozoa produce cysts
false; some do, but not all
What do protozoa have that protect them from osmotic lysis?
T/F: 30% of fungi cause diseases of plants, animals and humans (mycoses)
What is the name given to the nonreproductive body of fungi?
What long, branched, tubular filaments compose the thalli of molds?
What is the term applied to fungi that produce two types of thalli?
What form of dimorphic fungi generally cause diseases?
What is the term for a tangled mass of hyphae (typically subterranean)?
T/F: all fungi have the ability to reproduce asexually.
T/F: all fungi have the ability to reproduce sexually.
false, but most do.
What is a pseudohypha?
a series of buds that remain attached to one another and to parent cell
AIDS, common colds, hemorrhagic fevers, SARS, and smallpox are all caused by what type of pathogen?
T/F: viruses can have either DNA or RNA.
What is the name for the protein coat surrounding the nucleic acid core of viruses?
What outer structure do viruses have that encloses the nucelocapsids?
Other than protection, what other function is provided by capsids and envelopes of viruses?
means of attachment to host's cells
When is the capsid of a virus removed?
once the virus is inside the host
Once inside a host, how does a virus exist?
simply as nucleic acid
T/F: viruses are always specific and infect only a particular kind of cell in a particular host.
False; some are generalists and infect many kinds of cells in many hosts
What types of organisms are susceptible to viral attack?
What viral shape consists of capsids of many shapes?
What viral shape is spiral in nature?