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52 terms

Module 7 Chapter 12

STUDY
PLAY
An____ is characterized by a single thickened spore
-arthrospore
Which of the following is not a method of culturing viruses?
-in culture media
An oncogene is___.
-a gene associated with the formation of cancers
A ____ is a virus for a bacteria
-bacteriophage
Helical viruses____.
resemble long rods
Seventeen patients in ten hospitals had cutaneous infections caused by Rhizopus, a fungus. In all seventeen patients, Elastoplast bandages were placed over sterile gauze pads to cover wounds. Fourteen of the patients had surgical wounds, two had venous line insertion sites, and one had a bite wound. Lesions present when the bandages were removed ranged from vesiculopustular eruptions to ulcerations and skin necrosis requiring debridement. Fungi are more likely than bacteria to contaminate bandages because they ______.
can tolerate low-moisture conditions
The spectrum of cells that a virus can infect is called the___.
-host range
Pneumocystosis is an infection of the lungs by the fungus Pneumocystis carinii. What type of mycosis is pneumocystosis?
systemic
Reproductive hyphae are also known as___.
aerial hyphae
In a lichen, which of these is provided by the fungus?
-protection
What is the intermediate host for Plasmodium, the causative organism of malaria?
- the human
A definitive host harbors which stage of a parasite?
- the sexual stage
Which of the following is the more effective control for malaria.
eliminate Anopheles
How do all viruses differ from bacteria?
-viruses are obligate intracellular parasites
All protists_____.
have a nucleus
The body of a fungus is called the_____.
thallus
A roundworm is a _____.
-nematode
A flatworm is a ______.
-Platyhelminth
The mechanism whereby an non-enveloped virus leaves a host cell is called______.
-budding
Humans can get toxoplasmosis by______.
-inhaling cysts from kitty litter
The formation of a protective capsule by a protist is called_____.
encystment
_____ viruses generally have an elaborate coat structure, and may have other structures attached to the coat.
-helical
-enveloped
-complex
A viral genome may consist of ____.
DNA or RNA
Which of the following is not a characteristic of parasitic platyhelminths?
They have a complete digestive system
Flavoparmelia caperata isa lichen that forms leaf-like structures while growing on shrubs in hot, dry environments. What type of lichen is Flavoparmelia caperata?
Foliose lichen
An intermediate host harbors which stage of a parasite?
-the asexual stage
Which of the following is the most effective control for malaria?
-Eliminate Anopheles
Which of the following pairs is mismatched?
-telemorph produces both sexual and asexual spores
Herpesvirus-1 is an enveloped polyhedral virus that infects human nerve cells. It contains a single stranded DNA genome. What mechanism does herpesvirus-1 use to exit a cell after maturation?
Budding
Which of the following statements about fungi are not true?
All fungi are unicellular
Ringworm is a disease that affects the skin, hair, and nails. Despite the name, ringworm is a fungal mycosis, and doesn't involve a worm at all. How is ringworm classified?
-Dermatomycosis
Which of these is a method of growing animal viruses in the laboratory?
All of the above
A viroid is a completely developed infectious agent composed of nucleic acid and surrounded by a capsid
False
A persistent infection is one in which_____.
the disease process occurs gradually over a long period
How do enveloped viruses enter a host cell?
Fusion of membranes
When a virus enters a cell it must release its nucleic acid into the host cell. This is called____.
uncoating
Which of these statements is not true of viruses?
-viruses are prokaryotic
The mechanism whereby an non-enveloped virus leaves a host cell is called_____.
-penetration
Normal cells that become tumor cells undergo_____.
transformation
Humans are accidental hosts of rat lungworm disease because___.
humans catch the disease by eating unwashed vegtables
A viron is_____.
a complete, infectious virus particle
Which of these is not a characteristic of yeast?
they are filamentous
How do enveloped viruses enter a host cell?
Fusion of membranes
A fungal infection is known as a_____.
mycosis.
The _____ is the feeding and growing stage of protozoa.
trophozoite
Retroviridae refers to ___.
a viral species
Transmission of helminthic diseases to humans is usually through_____.
feces
Which of the following statements is not true?
Lichen are parasites
Which of these structures is a possible target for anti-fungal drugs?
Sterols in the membrane
Herpesvirus-1 is an enveloped polyhedral virus that infects human nerve cells. It contains a single stranded DNA genome. What mechanism does herpesvirus-1 use to exit a cell after maturation?
Budding
What is the definitive host for Plasmodium, the causative organism of malaria?
The Anopheles mosquito
Viruses that can cause cancers are called_______.
oncogenic viruses