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