Microbiology Quiz 8

‭=QUIZ 8‬ ‭1. What carbohydrate(s) cannot be used by Rickettsia as a substrate for growth?‬ ‭-‬ ‭Glucose‬ 2‭ . Select all of the metabolic processes‬‭Rhodospirillum‬‭rubrum‬‭is capable of utilizing when‬ ‭growing under anoxic conditions:‬ ‭●‬ ‭Photoheterotrophy‬ ‭●‬ ‭Photoautotrophy‬ ‭●‬ ‭Fermentation‬ 3‭ . Match the statements to the organisms they describe in order to test your knowledge of notable‬ ‭protists.‬ ‭ ‬ ‭Giardia = Pathogen with mitosomes‬ ➢ ‭ ‬ ‭Trichonympha = Termite gut inhabitant‬ ➢ ‭ ‬ ‭Euglena = Flagellate photoautotroph wit a stigma‬ ➢ ‭ ‬ ‭Trypanosoma = Parasite that causes African sleeping sickness‬ ➢ ‭ ‬ ‭Entamoeba = Parasite that causes amoebic dysentery‬ ➢ ‭ ‬ ‭Phytophthora = Destructive pathogen of plants‬ ➢ ‭ ‬ ‭Physarum = Acellular (plasmodial) slime mold‬ ➢ ‭ ‬ ‭Dictyostelium = Cellular slime mold‬ ➢ ‭ ‬ ‭CategoryParamecium = Ciliate with a macro- and a micro-nucleus‬ ➢ ‭ ‬ ‭CategoryPlasmodium = Parasite that causes malaria‬ ➢ 4‭ . Sort these descriptions of amoeboid structures and cell characteristics to match the correct‬ ‭terms:‬ ‭ ‬ ‭Pseudopodia = False feet of rlocomotion and feeding‬ ❖ ‭ ‬ ‭Lobopodia = Rounded pseudopodia‬ ❖ ‭ ‬ ‭Filopodia narrow= Long, pseudopodia‬ ❖ ‭ ‬ ‭Reticulopodia = Netlike mesh of pseudopodia‬ ❖ ‭ ‬ ‭Testate amoebae = Plasma membrane covered by secreted or collected material‬ ❖ ‭ ‬ ‭Naked amoebae =Plasma membrane not covered‬ ❖ ‭5. Asexual protist cell division is termed‬‭Binary‬‭fission‬ 6‭ . Members of this bacterial genus can utilize oxygen under aerobic conditions and nitrate under‬ ‭anaerobic conditions as a terminal electron acceptor:‬ ‭-‬ ‭Escherichia‬ ‭7. The sheath produced by Leptothrix cells mainly functions to:‬ ‭-‬ ‭accumulate large amounts of certain nutrients‬ 8‭ . You have isolated several bacteria from natural settings and they all stain Gram positive.‬ ‭Match each group of characteristics with the correct genus.‬ ‭●‬ F ‭ orms endospores, rod-shaped, facultative anaerobe, reduces nitrate when anaerobic,‬ ‭isolated from soil =‬‭Bacillus‬ ‭●‬ ‭Cannot form endospores, grows as pairs and chains of cocci, strictly fermentative,‬ ‭isolated from an infected throat =‬‭Streptococcus‬ ‭●‬ ‭Forms endospores, rod-shaped, obligate anaerobe, ferments amino acids, isolated from a‬ ‭gangrenous wound =‬‭Clostridium‬ ‭●‬ ‭Cannot form endospores, grows as clusters of cocci, facultative anaerobe, uses nitrate‬ ‭when anaerobic, isolated from a skin wound =‬‭Staphylococcus‬ 9‭ . Compare and contrast the intracellular life cycles of Legionella and Coxiella by placing each‬ ‭attribute under the appropriate genus:‬ ‭Legionella‬ ‭-‬ ‭RFs reside in replicative endosomes‬ ‭-‬ ‭Grows within protozoan hosts‬ ‭-‬ ‭MIFs form‬ ‭Coxiella‬ ‭-‬ ‭Enters host cell via phagocytosis‬ ‭-‬ ‭LCVs form‬ ‭-‬ ‭SCVs form‬ ‭10. How is the foram test used?‬ ‭-‬ ‭Oil companies use the test to help them find oil deposits.‬ ‭ATTEMPT 2‬ 1‭ . Species of Clostridium and Clostridium include obligately anaerobic, fermentative,‬ ‭Gram-positive bacteria that form endospores. These bacteria have great practical impact both in‬ ‭industry and as human pathogens. Identify some of the important species here:‬ ‭ ‬ ‭Clostridium acetobutylicum = blank is used to manufacture butanol.‬ ❖ ‭ ‬ ‭Clostridioides difficile = causes gastrointestinal disease.‬ ❖ ‭ ‬ ‭Clostridium botulinum = bills the causative agent of botulism.‬ ❖ ‭ ‬ ‭Clostridium tetani = is the causative agent of tetanus.‬ ❖ ‭2. What are‬‭four‬‭practical impacts pseudomonads may‬‭have?‬ ‭●‬ T ‭ hey are major human pathogens and include a frequent causative agent of lung‬ ‭infections.‬ ‭●‬ ‭Pseudomonas‬‭species can degrade many organic molecules‬‭and are sought after for‬ ‭bioremediation.‬ ‭●‬ ‭Studies of organism in this group have led to many advances in microbial‬ ‭physiology.‬ ‭●‬ ‭They cause spoilage of milk, eggs, meat, and seafood.‬ 3‭ . Which of these bacterial genera would you expect to be capable of carrying out nitrification?‬ ‭(Check all that apply.)‬ ‭●‬ ‭Nitrococcus‬ ‭●‬ ‭Nitrobacter‬ ‭●‬ ‭Nitrosomonas‬ ‭Match these slime mold genera with their growth habit:‬ -‭ ‬ P ‭ hysarum = Acellular slime mold‬ ‭-‬ ‭Dictyostelium = Cellular slime mold‬ 6‭ . Select the characteristics that help distinguish heliobacteria from other anoxygenic‬ ‭phototrophic bacteria:‬ ‭●‬ ‭Heliobacteria are the only Gram-positive anoxygenic phototrophic bacteria.‬ ‭●‬ ‭Heliobacteria have light harvesting pigments in their plasma membranes‬ ‭●‬ ‭Heliobacteria possess bacteriochlorophyll g‬ ‭7. Classify these attributes as applying to either streptococci or enterococci:‬ ‭Streptococci‬ ‭-‬ ‭Either alpha- or beta-hemolytic‬ ‭-‬ ‭Found in the mouth and respiratory tract‬ ‭-‬ ‭Can form biofilms‬ ‭-‬ ‭Cell wall contains M protein‬ ‭Enterococci‬ ‭-‬ ‭Can be alpha- or beta-hemolytic OR lack hemolytic abilities‬ ‭-‬ ‭Cell wall lacks M protein‬ ‭-‬ ‭Do not usually form biofilms‬ -‭ ‬ ‭Found in the GI tract‬ ‭8. Sort the descriptions into their corresponding bacterial types to organize information about‬ ‭characteristics of these important groups of Gram-positive bacteria.‬ ‭ ‬ ‭Clostridia = Endospore-forming strict anaerobes‬ ➢ ‭ ‬ ‭Bacilli = Diverse group of endospore-forming aerobes and fermenters‬ ➢ ‭ ‬ ‭Staphylococci = Skin inhabitants growing in grape-like clusters‬ ➢ ‭ ‬ ‭Lactobacilli = Acid-producing fermenters of foods‬ ➢ ‭ ‬ ‭Streptococci = Diverse group of human pathogens‬ ➢ ‭ TTEMPT 3‬ A ‭1. Which protist organelle is used principally for maintaining osmotic stability?‬ ‭-‬ ‭Contractile vacuole‬ 2‭ . The class Negativicutes was recently established. Although these organisms have an outer‬ ‭membrane like Gram-negative bacteria, they are placed among the Gram-positive based on the‬ ‭analysis of what molecule?‬ ‭-‬ ‭16S ribosomal RNA‬ 3‭ . Which of these characteristics pertaining to Bacillus subtilis help support the fact that it is an‬ ‭important model organism for the genus Bacillus and for other Bacillota (select all that apply)?‬ ‭●‬ ‭B. subtilis is a facultative anaerobe that can use nitrate as a terminal electron‬ ‭acceptor.‬ ‭●‬ ‭B. subtilis is the most well studied Gram-positive bacteria.‬ ‭●‬ ‭B. subtilis is a nonpathogenic microbe.‬ ‭●‬ ‭The genome of B. subtilis was one of the first bacterial genomes to be completely‬ ‭sequenced.‬ ‭DIMA‬ 1‭ .‬ ‭Which organelle is found in some organisms within‬‭the Discoba-Metamonada clade,‬ ‭but does not produce any ATP, despite its evolutionary history?‬ o‬‭Mitosome‬ ‭ ‭2.‬ ‭Select all of the characteristics that apply to‬‭exospores of Streptomycetales.‬ o‬‭Capable ‭ o‬ ‭Form ‭ of withstanding desiccation‬ in response to nutrient deprivation‬