🦠 Microbiology Solved MCQs with Answers

Practice 1927 approved 🦠 Microbiology questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

1927 solved MCQs

BiomassAnswer: Consists largely of wood, animal, and human waste Composting is one of the oldest forms of disposal of waste. It is the natural process of decomposition of organic waste that yields manure or compost. One of the following is added to the compost to get better results?Answer: Worms Which is not a form of biomass energy?Answer: Photovoltaic production of hydrogen Which of the following statement is not correct?Answer: The use of 25-40°C temperatures destroys potentially harmful bacteria Oxidation ponds are shallow ponds, generally designed at the depth ofAnswer: 2 to 40 feet Which of the following is generally not referred to the sewerage system?Answer: Solid sewers The magnitude of BOD of wastewater is related toAnswer: Amount of organic material A dense bacterial population caught in a tangled web of fibers sticking to a surface describesAnswer: A biofilm Biogas production isAnswer: A temperature-dependent process The acetate-utilizing methanogens are responsible forAnswer: 70% of methane produced in a biogas reactor Which of the following is responsible for the corrosion problem?Answer: Sulfur bacteria Water testing relies on the detection of certain indicator organisms known asAnswer: Coliforms The death of a river by environmental pollutants ultimately results fromAnswer: The depletion of oxygen The Redfield ratio is an index of concentration ofAnswer: carbon, nitrogen and phosphorous Removal of solids is generally considered as aAnswer: Primary treatment All of the following species are considered coliforms exceptAnswer: Salmonella typhi The sulfur pearl of Namibia, Thiomargarita namibiensisAnswer: Both (a) and (b) Chemical precipitation of phosphorus isAnswer: Tertiary treatment Which of the following is correct?Answer: Ultramicrobacteria or nanobacteria are the dominant bacteria in marine systems Coliforms are used as indicator organisms becauseAnswer: Both Hyphomycete fungiAnswer: Both (a) and (b) Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.Answer: Greater Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO₂ at each transfer. This sentence describes theAnswer: Microbial loop Which of the following is correct?Answer: All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes The amount of oxygen dissolved in hypolimnion water in the winter is __________ to/than the amount of oxygen dissolved in hypolimnion water in the summerAnswer: Greater Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column exceptAnswer: Escherichia Because it can be used with a variety of media and allow a resuscitation step the __________ technique has become the common and often preferred method of evaluating the microbiological characteristics of water.Answer: Membrane filtration Which of the following is correct?Answer: A Winogradsky column is used to demonstrate interactions and gradients that occur in aquatic environments Trickling filter comes underAnswer: Secondary treatment Which of the following species in water reveal the presence of fecal pollution of human or animal origin?Answer: All of these