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Sample Test Questions ____1) What is the term for using a virus to transfer DNA from one bacteria cell to another? a) transformation b) transduction c) conjugation d) plasmid reduction ____2) The process in which the chromosomes of a bacteria replicates and the cell divides is called a) transduction b) binary fusion c) conjugation d) binary fission ____3) Bacterial cells typically lack a) a cell membrane b) a cell wall c) mitochondria d) a chromosome ____4) Genetic recombination in bacteria always involves a) viruses c) transfer of DNA through a conjugation bridge b) transfer of one or more plasmids d) transfer of genes between bacterial cells ____5) Bacterial diseases of the intestines are usually transmitted by a) sneezes and coughs b) direct contact c) contaminated food and water d) contaminated wounds ____6) Which of the following is Not a mechanism of action of an antibiotic? a) inhibiting cell wall synthesis b) inhibiting conjugation c) inhibiting protein synthesis d) inhibiting DNA synthesis ____7) On what basis have bacteria traditionally been classified? a) shape b) response to Gram staining c) type of respiration d) All of the above. ____8) The type of bacteria which peptidoglycan is absent in cell walls a) eubacteria b) phototoautotrophs c) archaebacteria d) actinomycetes ____9) A process by which two living bacteria bind together and transfer genetic information is called a) conjugation b) transformation c) transduction d) encapsulation ____10) Archaebacteria and eubacteria are placed in separate kingdoms because archaebacteria a) lack cell membranes b) have cell walls that contain peptidoglycan c) evolved after eubacteria evolved d) have some genes that closely resemble those found in eukaryotes ____11) Bacteria can survive a) near volcanic vents b) in layers of infertile soil c) beneath ice d) All of the above. ____12) Gram-positive bacteria a) appear purple after Gram staining c) frequently cause diseases that cannot be cured by antibiotics b) have a thicker layer of peptidoglycan d) All of the above are true. ____13) Gram positive bacteria differ from Gram-negative bacteria in a) their response to the Gram stain c) their susceptibility to antibiotics b) the make up of their cell walls d) All of the above. ____14) Actinomycetes a) archaebacteria that are spiral shaped c) produce many antibiotics b) proteobacteria that causes tooth decay d) gram-negative bacteria that are photosynthetic ____15) One structure you would NOT find in a bacteria cell is a a) cell wall b) cell membrane c) mitochondrion d) chromosome ____16) Which types of bacteria can live in the presence of oxygen? a) only obligate anaerobes c) only obligate aerobes b) only obligate aerobes and facultative anaerobes d) all bacteria ____17) A poison that is released from the outer membrane of dead Gramnegative bacteria is called a) a pathogen b) an exotoxins c) an endotoxins d) a broad- spectrum toxin ___18) Which of the following types of bacteria would you be most likely to find in very salty water? a) chemoautotrophs cyanobacterium b) extreme halophile c) d) thermoacidophile ____19) Which of the following types of bacteria would you be most likely to find in the human intestinal tract? a) spirochete b) cyanobacterium c) thermoacidophile d) enteric bacterium ____20) The earliest known group of living organisms on Earth is a) viruses b) fungi c) bacteria d) protists ____21) Which of the following might be found in the cytoplasm of a bacteria cell a) chloroplast b) Golgi bodies c) mitochondria d) None of the above. ____22) Bacteria cells have a) a cell wall only c) both a cell membrane and an outer wall b) a cell membrane only d) a cell wall inside of their cell membrane ____23) It is important to distinguish between Gram-positive and Gram-negative bacteria in diagnosing a bacteria infection because a) Gram-negative bacteria are not killed by many antibiotics b) Gram-positive bacteria never cause fatal diseases c) Gram-positive bacteria destroy antibiotics, preventing them from working d) Gram-positive bacteria do not respond to many antibiotics ____24) Which of the following is a beneficial effect of certain bacteria? a) nitrogen fixing b) the synthesis of insulin c) nutrient cycling d) All of the above. ____25) Chemosynthesis a) is photosynthesis that is carried out by bacteria rather than plants b) is performed by heterotrophic bacteria c) enables the synthesis of organic molecules using energy from inorganic molecules d) cannot manufacture their own food ____26) Nitrogen fixing bacteria a) repair nitrogen damaged legume roots b) damage the environment by using atmospheric oxygen to produce toxic nitrogen compounds c) convert atmospheric nitrogen into ammonia d) convert ammonia in the soil into nitrogen gas ____27) Prokaryotes Do Have a cell membrane but Do NOT Have a a) nucleus b) single cell c) ribosome d) cell wall ____28) What are all of the known species of bacteria? a) eukaryotes b) multicellular c) prokaryotes d) viruses ____29) Bacteria are classified into Two Kingdoms: Kingdom eubacteria and Kingdom a) methanogens b) cyanobacteria c) archaebacteria d) Gram- negative bacteria ____30) Fossil evidence indicates that the earliest bacteria on Earth lived about a) 1 billion years before humans c) 1 billion years before eukaryotes b) 2 billion years before eukaryotes d) None of the above.
