Q. The bacterium that infects other gram-negative bacteria is Proteus mirabilis Haemophilus influenza Bdellovibrio Pseudomonas putida Answer: Bdellovibrio
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Q. The bacterial genus where sterols are present in the cell membrane is Vibrio Mycoplasma Escherichia Chlamydia Answer: Mycoplasma
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Q. Which phage is used for phage display technique? T7 M13 ƛ-phage ɸ6 Answer: ɸ6
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Q. The coagulase is done to differentiate Staphylococcus aureus from Staphylococcus epidermidis Staphylococcus epidermidis from Neisseria meningitidis Streptococcus pyogenes from Enterococcus faecalis Streptococcus pyogenes from Staphylococcus aureus Answer: Staphylococcus aureus from Staphylococcus epidermidis
Q. Which of the following is a gram-positive eubacterium? Actinomyces Clostridium Rhizobium Clostridium, Actinomyces Answer: Clostridium, Actinomyces
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Q. Which of the statements regarding gram staining is wrong? Mycobacterium tuberculosis stains blue because of the thick lipid layer Streptococcus pyogenes stains blue because of a thick peptidoglycan layer Escherichia coli stains pink because of a thin peptidoglycan layer Mycoplasma pneumoniae is not visible in the Gram’s stain because it has no cell wall
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Q. Which of the following is not a recognised cause of diarrhoea? Vibrio cholerae Escherichia coli Clostridium perfringens Enterococcus faecalis Answer: Enterococcus faecalis
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Q. The prokaryotic cell membrane Contains metabolic enzymes Is selectively permeable Regulates the entry and exit of materials Contains proteins and phospholipids Answer: Contains proteins and phospholipids
Q. Which of these bacterial components is least likely to contain useful antigens? Cell wall Flagella Ribosomes Capsule Answer: Ribosomes
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Q. Which of the following contains structures composed of N-acetylmuramic acid and N- acetylglucosamine? Mycoplasmas Amoeba E.coli Spheroplast Answer: E.coli
