Q. Gram staining technique is used for the differentiation of gram-positive and gram-negative bacteria. What color do gram-negative bacteria show when observed under the microscope after the staining procedure? Blue Pink Purple d)Green Answer: Pink
Q. Which of the following dye is commonly used for the Negative staining technique? Crystal violet India ink Lactophenol cotton blue Periodic acid- Schiff stain Answer: India ink
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Q. A bacteriological stain also known as the differential stain is used for the identification of acid-fast organisms, what is the name of the stain? Negative stain Gram stain Ziehl-Neelsen stain Schaeffer Fulton stain Answer: Ziehl-Neelsen stain
Q. Which of the following pulmonary pathogens cannot be easily detected by the gram staining technique when performing a microscopy test? Pseudomonas aeruginosa Streptococcus pneumoniae Bordetella pertussis Mycobacterium tuberculosis Answer: Mycobacterium tuberculosis
Q. A Capsule is a………………………………..layer lying outside the bacterial cell and can be found in both gram-positive and gram-negative bacteria Lipopolysaccharide layer Polysaccharide Phospholipid None of the Above Answer: Polysaccharide
Q. Which of the following are the growth morphology of the protozoa? Multicellular and non motile Unicellular and non motile Multicellular Unicellular and motile Answer: Unicellular and motile
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Q. Which of the following gram positive bacteria is a strict anaerobe and can only grow in the absence of oxygen? Streptococcus pneumoniae Bordetella pertussis Clostridium tetani Staphylococcus epidermidis Answer: Clostridium tetani
Q. Which of the following morphological characteristics is an important identification characteristic of Neisseria gonorrhoeae? Gram-Negative Diplococci Gram-Positive Bacilli Gram-Negative Bacilli Gram-Positive Diplococci Answer: Gram-Negative Diplococci
Q. Which of the following is the example of encapsulated gram-positive bacteria? Klebsiella pneumoniae Clostridium perfringens Streptococcus pneumoniae Haemophilus influenzae Answer: Streptococcus pneumoniae
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Q. Which of the following metabolic characteristic is a distinguishing characteristic and identification of colonies of E. coli? Hydrogen sulfide formation Indole Formation Lactose fermentation Urea Degradation Answer: Lactose fermentation
