Microbiology Test Bank Questions and Answers(A+ Solution guide)

Microbiology Test Bank Questions and Answers(A+ Solution guide) Penicillin controls bacterial growth by: A) preventing synthesis of the lipopolysaccharide layer B) inhibiting protein synthesis C) preventing cross-link formation in peptidoglycan D) preventing generation of the proton motive force - ANSWER preventing cross-link formation in peptidoglycan Reproduction via binary fission leads to what type of growth under optimal conditions: A) linear B) mixed C) exponential D) uptake-limited - ANSWER exponential Protection against osmotic lyses is provided by: A) lysosomes B) the cellular plasma membrane C) the cell's capsule D) the cell wall - ANSWER the cell wall Name associated with the presense of a cell wall and a capsule together in a bacterial cell wall: A) the envelope B) the capsule C) the cytoplasmic membrane D) the cell wall - ANSWER the envelope Which of the following is true about the lag phase: A) cells adapt to a new medium B) in some cases it may be very short C) cells replenish spent materials D) all of the above - ANSWER all of the above A student is asked by the professor to sub-culture a bacterial organism onto fresh media for future studies. However during sub-culturing the students lock the test tube preventing oxygen flow into the media. After days the culture dyes. What type of culture did the student have at hand: A) obligate aerobe B) strict anaerobe C) facultative anaerobe D) none of the above - ANSWER obligate aerobe Staining procedure designed for bacterial families with high lipid content and resistant to standard staining: A) gram stain B) negative staining C) acid fast staining D) simple stain - ANSWER acid fast staining Which of the following is not considered a starvation response? A) endospore formation B) synthesis of starvation proteins C) cell death at a logrtihmic rate D) a decrease in cellular size and nucleoid condensation - ANSWER cell death at a logrtihmic rate Organelle responsible for the synthesis of protein in a eukaryotic cell: A) the smooth ER B) the rough ER C) the Golgi complex D) the nucleus - ANSWER the rough ER Which of the following is the most important structure related to microbial attachment to cells? A) flagellum B) plasmid C) peptidoglycan D) glycocalix - ANSWER glycocalix Which of the following statement(s) is/are correct when comparing prokaryotic and eukaryotic genome? A) bacteria mostly have one circular DNA molecule B) Eukaryotes have linear DNA C) Both A and B D) None of the above - ANSWER Both A and B