MICROBIOLOGY: EVOLV.SCI.-W/ACCESS>CI<
4th Edition
ISBN: 9780393622805
Author: SLONCZEWSKI
Publisher: Norton custom
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Chapter 4, Problem 5TQ
Summary Introduction
To review:
The generation time for the following: Clostridium perfringens, Mycobacterium leprae, Thermusaquaticus,and Psychromonasantarcticus.
Introduction:
Microscopic organisms or microorganisms are the organisms that cannot be seen with unaided eyes. The observation of these microscopic living organisms requires the use of special instruments such as a microscope. The microorganisms can be bacteria, virus, protozoa or
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Fermentation products produced by the skin-colonizing bacterium Staphylococcus epidermidis benefit humans in which of the following ways?
A) Mucus is dissolved by these fermentation products
B) Pathogens are destroyed by this bacterium through phagocytosis
C) These products bind to receptors and interfere with viral infections
D) They reduce the pH to values less hospitable to pathogens
E) This acid consumes nutrients
22) 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 low
Chapter 4 Solutions
MICROBIOLOGY: EVOLV.SCI.-W/ACCESS>CI<
Ch. 4.1 - Prob. 1TQCh. 4.2 - Prob. 1TQCh. 4.2 - Prob. 2TQCh. 4.3 - Prob. 1TQCh. 4.3 - Prob. 2TQCh. 4.3 - Prob. 3TQCh. 4.3 - Prob. 4TQCh. 4.4 - Prob. 1TQCh. 4.4 - Prob. 2TQCh. 4.4 - Prob. 3TQ
Ch. 4.4 - Prob. 4TQCh. 4.4 - Prob. 5TQCh. 4.4 - Prob. 6TQCh. 4.4 - Prob. 7TQCh. 4.4 - Prob. 8TQCh. 4.6 - Prob. 1TQCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 1TQCh. 4 - Prob. 2TQCh. 4 - Prob. 3TQCh. 4 - Prob. 4TQCh. 4 - Prob. 5TQCh. 4 - Prob. 6TQCh. 4 - Prob. 7TQ
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- When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this information, you can conclude that the bacteriuma) is Staphylococcus epidermidis.b) is a lactic acid bacterium.c) is beta-hemolytic.d) is catalase-positive.e) can cause strep throat.arrow_forwardWhat is morganella morganii bacteria : 1) Gram stain; (2) Shape; (3) Arrangement; (4) Fermentation on lactose; (5) Fermentation on glucose; (6) Fermentation on sucrose; (7) Fermentation on mannitol; (8) EMB; (9) MSA; (10) Growth on MAC; (11) PEA; (12) Citrate utilization; (13) Catalase; (14) Gas production; (15) Aerotolerancearrow_forwardThermoplasma and Picrophilus grow best in which of the following extreme conditions?a) Low pH b) High salt c) High temperatured) a and c e) b and carrow_forward
- 17) What gives Aspergillus sydowii colonies their hairy appearance? a) Hyphae () b) Stipes ( c) Growing media ( ) d) Ascocarp 20) Identify the most correct choice: (a) Needham concluded that living can be generated from non-living. () b) Pasteur concluded that living can only be generated from living. ) c) Spallanzani concluded that living can be generated from non-living. ) d) all of the above. ) e a and barrow_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_forward29) The doubling time in the bacterial growth cycle is measured during: a) Prodromal period b) Log phase c) Incubation period d) Convalescence period e) none of the above 34.Singlet oxygen that can kill bacteria is produced by: a) Catalase b) Superoxide Dismutase c) Sunlight radiation d) Gamma radiation e) c & d 35) Bacteria that can grow in your refrigerator but really loves your freezer is labelled as: a) Hypothermophile b) Psychrophile c) Psycrotroph d) Thermophobe e) Archaebacteriaarrow_forward
- Which is true regarding bacterial and archaea species that use nitrogen and sulfur compounds in different ways? A) O Sulfate-reducing bacteria are those that respire anaerobically using sulfate. B) O Nitrifying bacteria are lithotrophs that produce nitrite and nitrate. C) O Denitrifying bacteria are those that respire anaerobically using various oxidized forms of nitrogen. D) O Sulfur oxidizing bacteria are lithotrophs that obtain energy from sulfur compounds either aerobically or anaerobically E) O All the above are true.arrow_forwardIs the Mueller-Hinton Agar (MHA) a complex or defined medium? Explain based on its composition. Is MHA a A) differential, B) selective, C) both differential and selective media, or D) neither? Explain based on what kind of microorganisms it allows to grow.arrow_forward1(a)What is a psychrotroph? (b)From what natural sources would you isolate a thermophile? A psychrophile? (C)How does temperature affect the growth of a microorganism? (D)State the temperature class for Escherichia coli, Bacillus sp, Aeromonas sp, Micrococcus luteus, and suggest their optimum growth temperature. 2 (a)Why is dilution important when determining microbe number? (B)How does a decrease in dye colour intensity affect the microbe ? (C)State the possible sources of error if plate counts and colour intensity of dilutions are incorrect or Precautions taken to prevent this from happening. ( this is not a graded assignment)arrow_forward
- ) Most human bacterial pathogens are labeled as __ according to their temperature requirement: a) Aerophiles b) Aerobes c) Anaerobes d) Psychrophiles e) Mesophilesarrow_forward7) Cyanobacteria and green algae are possible photosymbionts in which symbiosis? a)Legume - Root Nodule b)Termite - gut microbes c)Lichen d)Bobtail squid - A. fischeri 33) Fecal transplants have been used to successfully treat which of the following infections? a)COVID-19 b)Clostridium difficil c)Aliivibrio fischeri d)Agrobacterium tumefasciens 3) Which of the following promotes tumor formation in Crown Gall? a)Nod factors b)Ti plasmid c)Light organ d)Leghemoglobinarrow_forwardWhich of the following would occur if a motile bacterium were moving towards an attractant? A) Oa lower frequency of clockwise rotation of flagella B) Oa greater frequency of counterclockwise rotation of flagella C) Oa decrease in the frequency of tumbles D) OA, B, and C are correct E) OA and B are correct F) OB and C are correctarrow_forward
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Chapter 5 Microbial Metabolism; Author: Heather Davis;https://www.youtube.com/watch?v=wH_HrsfDWZw;License: Standard Youtube License