Microbiology: Principles and Explorations
9th Edition
ISBN: 9781118743164
Author: Jacquelyn G. Black, Laura J. Black
Publisher: WILEY
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Chapter 1, Problem 21SQ
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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
5) A pure culture A) is sterile . B) is a population of identical cells. C) is made of a clearly defined chemical medium. D) contains one microbial cell.
1. 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) distilled
Chapter 1 Solutions
Microbiology: Principles and Explorations
Ch. 1 - List three reasons to study microbiology.Ch. 1 - What is the difference between microbiology and...Ch. 1 - Prob. 1.3SCCh. 1 - List five bacterial diseases and five viral...Ch. 1 - Prob. 2.1SCCh. 1 - State the germ theory of disease. Try to think of...Ch. 1 - How did Pasteurs experiment with swan-necked...Ch. 1 - Why was the French microbiologists method of broth...Ch. 1 - What were the scientific contributions of Jenner,...Ch. 1 - Prob. 3.2SC
Ch. 1 - What is the Human Genome Project? How has...Ch. 1 - Prob. 1CCSCh. 1 - Prob. 1CTQCh. 1 - Can you think of some reasons why it might be hard...Ch. 1 - As often happens in science, one observation or...Ch. 1 - It is likely that others beside Anton van...Ch. 1 - The completion of chromosomal mapping and...Ch. 1 - Prob. 6CTQCh. 1 - Prob. 1SQCh. 1 - Conclusive evidence of thriving microbial life has...Ch. 1 - Which of the following is not true? (a) A single...Ch. 1 - Which is false regarding Archaea? (a) They lack a...Ch. 1 - Why are microbes important to study and how are...Ch. 1 - Prob. 6SQCh. 1 - Prob. 7SQCh. 1 - Animals such as worms and ticks are too large to...Ch. 1 - Prob. 9SQCh. 1 - Prob. 10SQCh. 1 - What triggered the development and establishment...Ch. 1 - Prob. 12SQCh. 1 - Prob. 13SQCh. 1 - The biggest obstacle in the acceptance and...Ch. 1 - Match the following terms to the appropriate...Ch. 1 - Prob. 16SQCh. 1 - Prob. 17SQCh. 1 - Prob. 18SQCh. 1 - Describe the contributions of the following...Ch. 1 - Prob. 20SQCh. 1 - Prob. 21SQCh. 1 - Prob. 22SQ
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- Which 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(a) Distinguish between biofilms and microbial mats and describe their relative significance. (b) Describe two methods, one that employs PCR and the other that does not, used to identify microorganisms by the molecular characteristics of their 16S FRNA. 3. (c) How do microorganisms enhance corrosion of metal and concrete surfaces?arrow_forwardA microbe is only capable of growth at pH range of 8.5-10 in the presence of atmospheric levels of oxygen. Which statements are correct? Mark all that apply. A.)The microbe is likely to be a human pathogen B.)The microbe is a mesophile C.)The microbe is an obligate aerobe D.) The microbe is an alkiliphilearrow_forward
- Drying is an effective antimicrobial strategy because:(a) It oxidizes cellular macromolecules(b) It limits the amount of water available to microbes(c) It increases susceptibility to UV irradiation(d) It triggers the thermal death pointarrow_forwardHow do you observe growth in liquid microbiological media? a) the medium is cloudy or turbid b) colonies appear on the surface of the medium c) the medium becomes solid d) colonies appear distributes throughout the mediumarrow_forwardThe thermal death point is best described as:(a) The highest temperature that will support growth of amicrobial culture(b) The length of time required for killing 100% of mi-crobes in a 24-hour culture that is heated to 100°C(c) The temperature at which a previously growing 24-hourculture will begin to die(d) The temperature at which 100% of the microbes in a24-hour culture will be killed in 10 minutesarrow_forward
- 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) Fermentationarrow_forwardThe use of sterile techniques and agar media enables microbiologists to study: a) Bacterial growth b) Nutrient agar-metabolizing culture c) Bacterial metabolism d) Pure cultures d) Bacterial life cyclarrow_forwardWhat is a chemostat? a) a chemical used as a substrate for growth of microbial cells b) a batch culture that uses a defined medium for growth c) a system used for the continuous culture of microbial cells d) a nutrient that is able to control the growth rate of a bacterial culturearrow_forward
- Transparent double-sided dishes used for growing microbes are most commonly called A) Petri dishes. B) baker dishes. C) sterilization plates. D) culture medium plates.arrow_forwarda) What is morphology? b) Describe the common morphological characteristics of bacteria that are often used in microbiological studies. c) Explain the chemical and physical requirements needed for bacterial growth d) Explain the importance of using growth medium and devise a STEP-BY-STEP plan to grow bacterial cell cultures in the laboratory.arrow_forwardA soil sample is placed in liquid and the number of bacteria in the sample determined in two ways: (1) colony count and (2) direct microscopic count. How would the results compare?a) Methods 1 and 2 would give approximately the same results.b) Many more bacteria would be estimated by method 1.c) Many more bacteria would be estimated by method 2.d) Depending on the soil sample, sometimes method 1 would be higher and sometimes method 2 would be higher.arrow_forward
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