NESTER'S MICROBIOLOGY-ACCESS
9th Edition
ISBN: 9781260518498
Author: Anderson
Publisher: MCG
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Chapter 5, Problem 9MC
Commercial canning processes are designed to ensure destruction of which of the following?
a) All vegetative bacteria
b) All viruses
c) Endospores of Clostridium botulinum
d)E. coli
e)Mycobacterium tuberculosis
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1) The slowest method in reducing the number of bacteria in a culture or the environment is: a) Sterilization b) Disinfection c) Antisepsis d) Sanitization e) Autolysis2) The molecule that helps insert the peptidoglycan monomers into the cell wall of the bacteria is: a) Ferredoxin b) Spherion c) Penicillin Binding Protein (PBP) d) Bactoprenol e) -Lactam Ring 3) A division in Eukaryotes that involves nuclear division without a cytokinesis will lead to the formation of: a) Baeocyte b) Mycellia c) Syncitium d) Myofibril e) all the above4) All the following are critical factors in determining the effectiveness of an antimicrobial agent except: a) Population size b) Species c) Location d) pH e) Temperature 5) The autoclave temperature must be raised up to _____ in order to effectively kill the bacterial spores: a) 121.1 oF b) 121.1 oC c) 121.1 oK d) 211 oF e) 112 oF
The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization?3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distille
10. The use of the autoclave ensures: a) the death of all bacteria b) the death of all bacterial spores c) all of the above d) none of the above.11. Foods can be preserved in all the followings except: a) lyophilizing b) Drying c) Salting d) Fermentation12. The temperature of the autoclave should be held for _____ minutes at least: a) 10 b) 15 c) 20 d) 30
Chapter 5 Solutions
NESTER'S MICROBIOLOGY-ACCESS
Ch. 5 - How is preservation different from pasteurization?Ch. 5 -
2. What is the most chemically resistant...Ch. 5 - Explain why it takes longer to kill a population...Ch. 5 - What is the primary reason that wine is...Ch. 5 -
5. What is the primary reason that milk is...Ch. 5 - When canning, why are low-acid foods processed at...Ch. 5 - How are heat-sensitive liquids sterilized?Ch. 5 -
8. How does microwaving a food product kill...Ch. 5 -
9. How is an iodophore different from a tincture...Ch. 5 - Name two products commonly sterilized using...
Ch. 5 - Unlike a disinfectant, an antiseptic a) sanitizes...Ch. 5 - The D value is defined as the time it takes to...Ch. 5 - Prob. 3MCCh. 5 - Prob. 4MCCh. 5 - Which concentration of alcohol is the most...Ch. 5 - All of the following could be used to sterilize an...Ch. 5 - All of the following are routinely used to...Ch. 5 - Aseptically boxed juices and cream containers are...Ch. 5 - Commercial canning processes are designed to...Ch. 5 -
10. Which of the following is false?
a) A...Ch. 5 - An agriculture extension agent is preparing...Ch. 5 - As a microbiologist representing a food...Ch. 5 - This graph shows the time it takes to kill...Ch. 5 -
2. This diagram shows the filter paper method...
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- Botulism is cause by an: a)Rickettsia b)Aneorobic spore forming bacteria c)Gram negative diplococcus d) Gram positive coccus e) Aerobic spore forming bacteriaarrow_forwardWhich of the following genera is used in bread, wine, and beer production?a) Lactobacillus b) Pseudomonas c) Saccharomycesd) Streptococcus e) Staphylococcusarrow_forwardWhich of the following agents if introduced into a growing culture of bacteria would halt growth but if removed would allow growth to continue? A) Antiseptic B) Bacteriostatic agent C) Disinfectant D) Bactericidal agent E) Sterilizing agentarrow_forward
- 19) Which of the following BEST describes an agent that is bactericidal? A) Windex. B) It suspends bacterial growth. C) It kills the bacteria. D) It causes the bacteria to destroy themselvesarrow_forward1. The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization? 3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distilledarrow_forward21) The use of Penicillin and Bacteriocins are examples of: a) Toxin-mediated killing b) Viral mediated lysis c) Predation-mediated killing d) Metabolite inhibitors e) DNA inhibitors 22) Evaluating the effectiveness of a chemical or reagent is done through: a) Periodic transfer and refrigeration b) the Phenol Coefficient test c) Lyophilization d) Viral mediated lysis e) a and b23) Salmonella typhi and Staphylococcus aureus are two species used in: a) Toxin-mediated killing b) Viral mediated lysis c) Predation-mediated killing d) Autoclave effectiveness evaluation e) Phenol Coefficient test24) Chemotherapeutics have ____ Toxicity: a) Broad spectrum b) General c) Differential d) Selective e) c & d 25) The gas that has been used recently used to decontaminate biological safety cabinets is: a) EtO b) Beta-propiolactone c) NO Gas d) N2O Gas e) Vapor-phase H2O2arrow_forward
- GROWTH OF FUSOBACTERIUM ON KANAMYCIN/VANCOMYCIN AGAR (KV) CAN BE DESCRIBED AS a) pigmented b) black c) hemolytic d) inhibited (no growth)arrow_forward22) Which of the techniques/characteristics below may be used to identify a target bacterium in a pool of microorganism? a) its morphology b) its growth requirement c) antibody-antigen interaction ) d) all of the above. ) e) a and c 23) What is the process that produces alcohol in S. cerevisiae (yeast)? () a) Respiration ( b) Sedimentation c) Photosynthesis )d) Fermentation 24) Identify the most mistaken (wrong) choice: a) Halophiles are those organisms that like high salt concentrations. ) b) Some bacteria reproduce by binary fission. ( c) A fungus cell contains a true nucleus. d) During the lag phase of growth, the metabolic activity is very lowarrow_forwardThe difference in the colony appearance of bacteria cells growing on mannitol salt agar is detected by a) methyl blue b)methyl red c) phenol d) eosin e) salt .arrow_forward
- 44. The use of chemical agents to kill or inhibit the growth of microorganisms within their host’s tissue is called: a) antiseptic b) sanitization c) disinfection d) chemotherapeutic e) sterilizationarrow_forward11. Foods can be preserved in all the followings except: a) lyophilizing b) Drying c) Salting d) Fermentation 12. The temperature of the autoclave should be held for _____ minutes at least: a) 10 b) 15 c) 20 d) 30 13. The organism used to produce soft cheese is: a) Penicillium b) lactic acid producing bacteria c) ethanol producing bacteria d) a and carrow_forwardWhat is a generally minimum pH for growth and toxin production by Clostridium botulinum and other foodborne pathogens?a) 8.5 b) 7.0 c) 6.5 d) 4.5 e) 2.0arrow_forward
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