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Disinfectants and Their Properties Quiz

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Questions and Answers

What type of phage allows phages to take a bit of the adjacent bacterial DNA?

Virulent phage

Specialized transduction

Lytic phage

Temperate phage (correct)

Which process describes the spread of antibiotic resistance genes facilitated by mobile DNA segments?

Transposons (correct)

Mutation

Genetic Variation

Transduction

What is the term for destroying endospores of Clostridium botulinum?

Degerming

Antiseptic

Disinfection

Commercial sterilization (correct)

Which agent inhibits the growth of bacteria without killing them?

Bacteriostatic agent (A) Signup and view all the answers

Which of the following is true about alcohols used as disinfectants?

They can kill bacteria and fungi but not endospores or naked viruses (C) Signup and view all the answers

In genetic transfer among bacteria, which process involves cells becoming immune to reinfection by the same phage?

Lysogenic conversion (D) Signup and view all the answers

Which of the following heavy metals exhibits oligodynamic action and is used as a disinfectant?

Silver (B) Signup and view all the answers

What is the term for the destruction of harmful microorganisms in inanimate objects?

Disinfection (D) Signup and view all the answers

What is the main advantage of quaternary ammonium compounds (Quats) as antimicrobial agents?

They function as cationic detergents (B) Signup and view all the answers

What is the difference between resident flora and transient flora in the human body?

Resident flora are fixed types, regularly found, while transient flora temporarily inhabit the body (D) Signup and view all the answers

What factors contribute to eliminating non-resident flora from the skin?

Presence of lysozyme (C) Signup and view all the answers

Which antimicrobial agent is known for its oligodynamic action and effectiveness against bacteria and fungi?

Copper sulfate (A) Signup and view all the answers

What advantage do phenolics have as antimicrobial agents?

They persist for a long time (D) Signup and view all the answers

Which halogen is found in tincture of iodine?

Iodine (B) Signup and view all the answers

How does formaldehyde function as a disinfectant?

By denaturing proteins (B) Signup and view all the answers

What is the advantage of using glutaraldehyde over formaldehyde as a sterilizing agent?

It is less irritating and more effective (C) Signup and view all the answers

Which antimicrobial agent is known for being a sporicide at higher temperatures?

Hydrogen peroxide (A) Signup and view all the answers

How does ethylene oxide act as a gaseous sterilizer?

By replacing functional groups with alkyl groups (C) Signup and view all the answers