Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject Microbiology. Read following article for your reference.
Classification And Mode Of Action Of Disinfectants » PHARMACAREERS
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What is the primary purpose of disinfectants?
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a) To kill or inhibit the growth of microorganisms
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b) To provide nutrients to microorganisms
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c) To enhance the growth of microorganisms
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d) To neutralize toxins
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Which type of disinfectant works by denaturing proteins and disrupting cell membranes?
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a) Alcohols
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b) Halogens
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c) Phenolics
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d) Quaternary ammonium compounds
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Which of the following is a commonly used alcohol-based disinfectant?
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a) Ethanol
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b) Chlorine
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c) Formaldehyde
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d) Iodine
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What is the mode of action of halogen-based disinfectants like chlorine and iodine?
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a) Oxidizing cell components
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b) Disrupting cell membranes
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c) Inhibiting protein synthesis
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d) Denaturing nucleic acids
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Which disinfectant is known for its ability to kill spores and is often used in sterilization?
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a) Hydrogen peroxide
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b) Alcohol
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c) Quaternary ammonium compounds
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d) Phenolics
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What type of disinfectant is benzalkonium chloride?
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a) Halogen
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b) Alcohol
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c) Phenolic
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d) Quaternary ammonium compound
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Which of the following disinfectants is effective against a wide range of microorganisms, including bacteria, viruses, and fungi?
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a) Ethanol
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b) Chlorhexidine
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c) Phenol
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d) Formaldehyde
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Which disinfectant is commonly used in water treatment to kill bacteria and viruses?
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a) Alcohol
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b) Phenol
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c) Chlorine
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d) Quaternary ammonium compounds
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What is the mode of action of phenolic disinfectants?
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a) Denaturing proteins and disrupting cell membranes
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b) Oxidizing cell components
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c) Inhibiting DNA synthesis
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d) Disrupting the cell wall
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Which disinfectant is most effective at killing Mycobacterium tuberculosis?
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a) Alcohol
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b) Iodine
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c) Glutaraldehyde
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d) Quaternary ammonium compounds
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Which class of disinfectants works by interfering with the permeability of the cell membrane?
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a) Halogens
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b) Alcohols
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c) Phenolics
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d) Quaternary ammonium compounds
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Which disinfectant is commonly used for skin antisepsis before surgeries?
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a) Chlorine
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b) Phenol
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c) Isopropanol
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d) Hydrogen peroxide
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Which of the following disinfectants releases free radicals to damage microbial cells?
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a) Quaternary ammonium compounds
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b) Alcohol
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c) Hydrogen peroxide
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d) Chlorhexidine
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What is a common use of aldehyde disinfectants like aldehyde and glutaraldehyde?
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a) Disinfecting drinking water
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b) Sterilizing medical instruments
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c) Hand sanitization
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d) Surface cleaning
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Which disinfectant is known for its persistent activity, making it effective for long-term disinfection?
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a) Ethanol
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b) Chlorhexidine
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c) Phenol
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d) Hydrogen peroxide
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Which disinfectant class is commonly used in household cleaning products for its broad-spectrum antimicrobial activity?
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a) Alcohols
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b) Phenolics
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c) Quaternary ammonium compounds
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d) Aldehydes
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What is the primary mechanism of action for alcohol-based disinfectants?
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a) Denaturing proteins
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b) Oxidizing cell components
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c) Disrupting cell walls
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d) Interfering with DNA synthesis
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Which disinfectant is known for its ability to a protective barrier on surfaces, preventing microbial growth?
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a) Chlorine
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b) Iodine
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c) Chlorhexidine
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d) Formaldehyde
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Which of the following disinfectants is used in the disinfection of endoscopic equipment due to its effectiveness against a wide range of microorganisms?
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a) Ethanol
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b) Glutaraldehyde
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c) Phenol
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d) Chlorhexidine
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What type of disinfectant is typically used to disinfect large areas such as hospital rooms and laboratories?
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a) Alcohol
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b) Quaternary ammonium compounds
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c) Phenolics
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d) Chlorine dioxide
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Which disinfectant is effective against biofilms and used in healthcare settings to ensure thorough disinfection?
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a) Alcohol
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b) Chlorhexidine
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c) Phenol
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d) Hydrogen peroxide
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What is the mode of action of chlorine dioxide disinfectants?
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a) Disrupting cell membranes
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b) Oxidizing cellular components
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c) Inhibiting protein synthesis
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d) Denaturing nucleic acids
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Which disinfectant is used in the food industry to sanitize equipment and surfaces without leaving harmful residues?
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a) Quaternary ammonium compounds
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b) Chlorhexidine
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c) Ethanol
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d) Hydrogen peroxide
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Which disinfectant class includes agents that are both bactericidal and virucidal, making them effective for a wide range of applications?
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a) Halogens
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b) Alcohols
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c) Phenolics
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d) Quaternary ammonium compounds
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Which disinfectant is preferred for use in cleanrooms and controlled environments due to its minimal residue and rapid action?
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a) Chlorhexidine
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b) Hydrogen peroxide
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c) Phenol
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d) Quaternary ammonium compounds
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What is the primary advantage of using hydrogen peroxide as a disinfectant?
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a) Low cost
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b) Residual activity
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c) Broad-spectrum activity
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d) Long contact time required
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Which disinfectant is commonly used for hand sanitizers due to its rapid antimicrobial activity?
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a) Phenol
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b) Chlorhexidine
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c) Ethanol
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d) Quaternary ammonium compounds
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What type of disinfectant is effective against spore-ing bacteria, making it suitable for sterilization processes?
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a) Alcohols
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b) Quaternary ammonium compounds
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c) Aldehydes
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d) Halogens
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Which of the following disinfectants is often used in combination with alcohol to enhance its antimicrobial activity?
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a) Chlorine
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b) Phenol
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c) Iodine
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d) Formaldehyde
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What is the primary factor to consider when selecting a disinfectant for use in pharmaceutical manufacturing?
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a) Cost
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b) Speed of action
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c) Compatibility with materials
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d) All of the above
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