Q. Mannitol Salt agar constitutes of high salt concentration that is used as both selective and differential culture media for the isolation of which of the following gram-positive cocci? Klebsiella spp Streptococcus spp Staphylococcus spp Pseudomonas spp Answer: Staphylococcus spp
Q. Which of the following media is one of the commonly used media for the proper isolation of gram negative pathogens such as Haemophilus spp and Neisseria gonorrhoeae? Potato dextrose agar Chocolate agar Nutrient agar Mac Conkey agar Answer: Chocolate agar
Q. Which of the following bacteria is a part of the human gut and mouth flora that is also important in making some fermented dairy products? Candida albicans Lactobacillus acidophilus Staphylococcus aureus Micrococcus luteus Answer: Lactobacillus acidophilus
Q. Which of the following bacteria have a hemolytic property that can grow well in blood agar? Bacillus anthracis Proteus vulgaris Streptococcus pyogenes Candida albicans Answer: Streptococcus pyogenes
Q. All of the statements regarding Bacillus anthracis are true, Except The causative agent of smallpox Nonhemolytic colonies appear on Blood agar Commonly transmitted from animals to humans Endospore-forming bacteria Answer: The causative agent of smallpox
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Q. Clostridium perfringens on agar can show all of the following cultural characteristics, Except? Microaerophilic Spore-forming H2S production Haemolysis (alpha and beta) Answer: Microaerophilic
Q. Which of the bacteria consists of flagella and shows a positive motility test? Staphylococcus aureus Yersinia pestis Klebsiella pneumoniae Proteus vulgaris Answer: Proteus vulgaris
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Q. All of the following bacteria are catalase positive, Except E. coli Shigella spp Staphylococcus spp Streptococcus spp Answer: Streptococcus spp
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Q. The metabolic reactions are shown by different bacteria help in the identification and classification of bacteria, which of the following biochemical tests show a negative result for Escherichia Coli? Lactose Indole Citrate Glucose Answer: Citrate
Q. All of the following are common stains used in the microbiology laboratory, Except: Bismarck brown Lactophenol cotton blue Ziehl – Neelsen stain Crystal violet Answer: Bismarck brown
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