Micro Final: Ch 12

Which of the following is an example of a mechanical vector? a tick picked up during a walk in the woods a fly crawling on a sandwich a mosquito biting a human lice found in bedsheets and clothes

Organisms known as diatoms are classified with the water molds. protozoa. fungi. helminthes. algae.

Aseptate hyphae of fungi are automatically dimorphic. coenocytic. haustoria. branched.

The ___________ include organisms classified as Deuteromycetes. arachnids fungi water molds protozoa algae

Which of the following is a cell type associated with sexual reproduction in fungi? haustoria mycorrhiza dikaryon pneumocyst sporangiospore

The asexual spores of molds are classified according to their shapes. size. type of metabolism. number of chromosomes. mode of development.

Which of the following is a carnivorous protozoan? Paramecium Vorticella Balantidium Didinium

A microbiologist isolates a bioluminescent protozoan. Why should the microbiologist be careful? -the protozoan may produce a pseudoplasmodium -the protozoan may cause malaria -the protozoan may cause diarrhea -the protozoan may produce a neurotoxin

Which of the following protozoan genera helps termites digest wood? Trichomonas Pfiesteria Naegleria Trichonympha Nosema

An aligned pair of homologous chromosomes is called a spindle. gamete. coenocyte. chromatid. tetrad.

What is the key difference between yeast and mold? -Yeast is colonial, while mold is multicellular. -Yeast have cellulose cell walls, while mold has chitin cell walls. -Yeast is unicellular, while mold is multicellular. -Yeast is a fungus, while mold is an alga.

You are given an unknown, pure sample of a eukaryotic organism. Which of the following tests would allow you to determine if the sample contains algae? -Inject the organism into a lab animal. If it does not cause disease, it is an alga. -Perform a biochemical test for the presence of chitin. -Place the sample in a clear container filled with media containing no sugars, and leave it in a sunny window. After a few weeks, look for growth of the organism. -Determine if the organism is unicellular by microscopy. If it is unicellular, it is an alga.

Which of the following new chemicals would NOT be effective against Giardia? -a chemical that inhibits the formation of cell walls -a chemical that inhibits formation of the membrane around the nucleus -a chemical that inhibits the Krebs cycle -a chemical that inhibits cell division

When shellfish ingest dinoflagellates, __________. they enter into a symbiotic relationship they turn red they can become poisonous they become bioluminescent

Which of the following groups of algae is notable for having members with silica cell walls? Rhodophyta Chlorophyta Chrysophyta Phaeophyta

Tori, a 24-year-old graduate student, had been suffering from a respiratory infection for over a week. She went to the student health center, where the physician prescribed her a broad-spectrum antibiotic. By the end of her round of antibiotics, Tori was no longer suffering from respiratory complications, but she had noticed an increase in itchiness in her genital region. Within a few days, the itchiness was getting worse and was accompanied by a vaginal discharge that had a cheesy consistency and foul odor. Tori returned to the student health center to discuss her condition with the physician. A sample of her discharge was taken and sent to the laboratory for microscopy and plating. Based on the lab results, which organism is most likely causing Tori's new symptoms? Candida albicans Trichomonas vaginalis Sporothrix schenckii Gardnerella vaginalis

Which of the following best explains why Tori developed a new series of symptoms? -Tori's immune system was compromised because of her respiratory infection, and this resulted in a yeast infection. -Tori contracted a sexually transmitted infection that was not related to the primary respiratory infection. -The antibiotics that treated Tori's primary respiratory infection also removed some of her normal bacterial flora, resulting in an overgrowth of other organisms. -The initial antibiotics were not successful in clearing the respiratory infection, so the organism disseminated to the genitourinary tract.

Which of the following could Tori's physician choose as a treatment for her yeast infection? Select all that apply. -an antiviral medication, such as acyclovir -a topical over-the-counter ointment, such as clotrimazole or miconazole -a single oral dose of fluconazole -an oral narrow-spectrum antibiotic, such as penicillin G

Which of the following infections are also caused by C. albicans? Select all that apply. syphilis fulminating disease oral thrush genital warts

Which of the following statements best describes why the treatment for Tori's fungal infection may result in side effects to her own cells? -Fungal cells and human cells have a nucleus, multiple organelles, and 80S ribosomes for protein synthesis. -Fungal cells and human host cells both have flagella for movement. -Fungal cells and human host cells both have cell walls made of cellulose. -Fungal cells and human cells both reproduce via budding

How do blastoconidia and chlamydoconidia produced by yeast differ from bacterial endospores? -Blastoconidia and chlamydoconidia are male and female mating structures used for reproduction in yeasts, whereas bacterial endospores are asexual reproductive structures. -Blastoconidia and chlamydoconidia are produced only by yeasts in extreme conditions, whereas bacterial endospores are asexual reproductive structures. -Blastoconidida and chlamydoconidia are identical to endospores. -Blastoconidia and chlamydoconidia are spore structures produced by budding in yeasts, whereas bacterial endospores are produced by bacteria under extreme conditions.

How do pseudohyphae in yeasts differ from vegetative hyphae in filamentous fungi? -Yeasts use pseudohyphae to invade host tissue, whereas filamentous fungi use their vegetative hyphae for obtaining nutrients. -Yeasts use pseudohyphae as a means of sexual reproduction, whereas parasitic fungi use their hyphae to invade host tissue. -Yeasts use pseudohyphae as a means of obtaining nutrients, whereas filamentous fungi use vegetative hyphae as a means of reproduction. -Yeasts use pseudohyphae for obtaining nutrients, whereas filamentous fungi use their vegetative hyphae to invade host tissues.