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MCB EXAM3 QUIZ 12
Terms in this set (13)
Which of the below phyla are not Eubacteria ("true bacteria")? a. Crenarchaeota, Thaumarchaeota, and Euryarchaeota b. Cyanobacteria, Chloroflexi, and Chlorobi c. Aquificae, Thermotogae, and Deinococcus-Thermus d. Proteobacteria
Which of the following statements is false regarding the characteristics of Rickettsias? a. They are Archaea. b. They are the cause of Rocky Mountain Spotted Fever. c. They are obligate intracellular parasites. d. They belong to class Alphaproteobacteria. e. They take advantage of host cell machinery for growth and reproduction.
Most of the oligotrophic proteobacteria are found in the
The purple nonsulfur bacteria ________. a. grow anaerobically as photoorganoheterotrophs b. utilize organic molecules as a source of electrons for photosynthesis c. typically can grow aerobically in the dark as chemoorganoheterotrophs d. All of the choices are correct.
The endosymbiotic hypothesis, generally accepted as the origin of eukaryotic organelles, is based on: a. Mitochondria and chloroplasts have bacteria-like ribosomes, with 16S rRNA. b. Most mitochondria and chloroplasts have circular genomes. c. There is a lot of genetic similarity of the genomes of alpha-proteobacteria and cyanobacteria with the genomes of mitochondria and chloroplasts, respectively. d. All of the above e. A and B only
Cyanobacterial genera Synechococcus and Prochlorococcus account for 1/3 of the biomass in the oceans but are responsible for less than 1% of global CO2 fixation
Discovery of bacterially-derived useful compounds can be obtained only by culturing microorganisms, and not using any molecular techniques such as metagenomics
All species in the Vibrio genus are pathogenic to humans
The Gram-positive bacterial phylum Actinobacteria is a rich source of metabolites useful to humans. These include: a. Antibiotics b. Beta-lactamase inhibitors c. Antihelminthics d. Biofuels such as butanol e. A, B, and C only
In ancient DNA studies using molecular biology methods, researchers found that ancient humans often were infected by both Mycobacterium tuberculosis and Mycobacterium leprae.
Diptheria, tuberculosis, and leprosy are all human diseases caused by
Staphylococcus aureus cells have the following shape:
MRSA is a methicillin-resistant strain in the ______ genus.
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