Micro Quiz 4

Which of the following pairs is mismatched? red algae agar diatoms petroleum green algae prokaryotic brown algae algin dinoflagellates paralytic shellfish poisoning

green algae prokaryotic

Photosynthetic organisms always produce oxygen gas as a metabolic byproduct. True False

False

The Gram stain is not suitable for identifying members of the Archaea. True False

False

All of the following bacteria are gram-positive. Which does NOT belong with the others? Gardnerella Mycobacterium Listeria Actinomyces Corynebacterium

Listeria

A primary difference between cyanobacteria and purple and green phototrophic bacteria is cell type. energy source. color. electron donor for CO2 reduction. cell wall type.

electron donor for CO2 reduction.

Which of the following is the most effective control for malaria? vaccination eliminate Anopheles mosquitoes eliminate the intermediate host treating patients None of these is an effective control.

eliminate Anopheles mosquitoes

1-Arthroconidium 5-Chlamydoconidium 2-Ascospore 6-Conidiospore 3-Basidiospore 7-Sporangiospore 4-Blastoconidium 8-Zygospore In the table, which is a thick-walled spore formed as a segment within a hypha? 5 3 1 7 None of the answers is correct.

5

Which of the following statements about algae is FALSE? A) They use CO2 as their carbon source. B) Some are capable of sexual reproduction. C) They produce oxygen from hydrolysis of water. D) All are unicellular. E) They use light as their energy source.

All are unicellular.

Which of the following pairs is mismatched? A) archaea extremophiles B) chemoautotrophic bacteria fix atmospheric nitrogen C) dissimilatory sulfate-reducing bacteria produce H2S D) Cytophaga a gliding, nonfruiting bacterium E) actinomycetes reproduce by fragmentation

B) chemoautotrophic bacteria fix atmospheric nitrogen

Which of the following genera is an anaerobic gram-negative rod? Treponema Bacteroides Staphylococcus Escherichia Neisseria

Bacteroides

You see acid-fast oocysts in a fecal sample from a patient who has diarrhea. What is the MOST likely cause? diatoms Cryptosporidium Taenia Giardia Entamoeba

Cryptosporidium

If a typhoid fever outbreak has occurred, which of the following statements is true? A) Proteus species are probably present. B) Shigella species are present and may have been transmitted by cattle. C) Salmonella is present, and the serovars may be differentiated by antigenic analysis. D) Escherichia coli is present, probably passed on by infected human waste in the water supply.

C) Salmonella is present, and the serovars may be differentiated by antigenic analysis. Salmonella is the genus of the bacteria that are associated with typhoid.

Which of the following statements about helminths is FALSE? A) They are multicellular animals. B) They are heterotrophic. C) Some have male and female reproductive organs in one animal. D) All are parasites. E) They have eukaryotic cells.

D) All are parasites.

Which of the following bacteria is gram-negative? Bacillus Mycobacterium Staphylococcus Treponema Corynebacterium

Treponema

Arthropod vectors are blood-sucking animals such as ticks, lice, and fleas that transmit microbial pathogens. True False

True

Which of the following pairs is mismatched? Which of the following pairs is mismatched? microsporidia lack mitochondria Ascomycota conidiospores Zygomycota sporangiospores anamorphs lack spores Basidiomycota basidiospores

anamorphs lack spores

You observe a mass of amoeba-like cells that swarm together, form a stalk, and produce spores. This is a(n) tapeworm. Euglenozoa. plasmodial slime mold. ascomycete. cellular slime mold.

cellular slime mold.

Which of the following groups of algae does NOT produce compounds that are toxic to humans? green algae diatoms dinoflagellates red algae None of the answers is correct; all of these groups of algae produce compounds toxic to humans.

green algae

Giardia and Trichomonas are unusual eukaryotes because they are motile. lack mitochondria. do produce cysts. do not produce cysts. lack nuclei.

lack mitochondria.

Which of the following is NOT a characteristic inherent of the non-endospore-forming gram-positive rods? nonpathogenic are aerotolerant carry out fermentative metabolism lack cell walls display a branched filamentous morphology

nonpathogenic