Which of the following statements is not accurate regarding the disinfectant Information provided in this module? Phenol disinfectants have a long shelf life. Formaldehyde gas can be used as a sterlant. Autodiwes can be used to sterllize blohazards. All disinfectants are equally effective against all microorganisms used in research laboratories.
Added by John C.
Close
Step 1
Formaldehyde gas can be used as a sterilant. Autoclaves can be used to sterilize biohazards. All disinfectants are equally effective against all microorganisms used in research laboratories. Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 80 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
66. Based on what you have learned on antiseptics and disinfectants, which of the following is the least toxic to humans? A. carbolic acid (phenol) B. glutaraldehyde C. sodium hypochlorite (the active ingredient in bleach) D. formalin E. hydrogen peroxide 67. T F Pasteurization achieves sterilization of products such as milk and wine. Use the following information to answer questions 68-69. Exposure Time Phenol Dilution New Disinfectant Dilution 1:100 1:110 1:120 1:60 1:50 1:60 1:70 1:80 5 min + + + - + + - - 10 min + + - - + - - - Use the data displayed on the table above to answer the following question(s). 68. A technician was testing a new disinfectant to determine its phenol coefficient and obtained the results displayed in the figure above. What is the phenol coefficient for the new disinfectant? A. 200 B. 0.5 C. 20 D. 0.25 E. cannot be determined 69. Is this disinfectant likely to be a good one? A. yes B. no C. maybe D. cannot be determined
Sri K.
True or False 1. The larger the zone of inhibition the higher the toxicity of the chemical agent against the microbe. 2. Phenolic compounds can disrupt plasma membranes. 3. Both iodine and chlorine can be used as antiseptic agents. 4. Ethanol is good for sterilization because it is good against enveloped viruses as well as bacteria, but not endospores. 5. Aldehydes can be used as sterilants. 6. Essential oils are able to disrupt the plasma membrane.
Refrigeration can be a means of controlling bacterial growth except for bacteria classified as; A. thermophiles B. mesophiles C. psychrophiles D. freezophiles E. all of the above A disinfectant used in most health care facilities/laboratories as a "universal precaution" against HIV and hepatitis is a/an; A. aldehyde B. hypochlorite C. iodophor D. phenol E. ammonium hydroxide A disinfectant adapted by Lister and used as a comparison of effectiveness for other disinfectants is a/an; A. aldehyde B. hypochlorite C. iodophor D. phenol E. listerine The most commonly used iodine compound in soaps is; A. lysol B. bisphenols C. tricolsan D. betadine E. formaldehyde A compound that has a germicidal effect due to the direct/indirect actions oxygen on the bacterial cell is; A. aldehyde B. hypochlorite C. hydrogen peroxide D. phenol E. ammonium hydroxide Compounds that dissolve the bacterial lipid membrane and disrupt the cell surface tension and can cause bacterial dehydration are; A. aldehydes B. hypochlorites C. alcohols D. phenols
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD