Pearson eText for Laboratory Experiments in Microbiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780137546503
Author: Ted Johnson, Christine Case
Publisher: PEARSON+
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 33, Problem 1Q
What was the purpose of the balloon on the glucose—yeast extract broth bottle?
Expert Solution & Answer
Summary Introduction
To write:
The purpose of the balloon on the glucose-yeast extract broth bottle.
Introduction:
Glucose-yeast extract broth is the medium for the cultivation and the maintenance of Bacillus licheniformis, Bacillus sp., Clavibacter, Flavobacterium, Pseudomonas fluroscens and Serratia marrescens as well as the yeast species. It is soluble in water.
Explanation of Solution
Glucose-yeast extract method is used for the detection of presence of the yeast in the given sample. Samples, warm water, sugar, balloon and an empty bottle is required for performing the test. Yeast produces carbon dioxide after metabolizing glucose.
A balloon is used for the detection of the presence of the yeast as after metabolizing the glucose, yeast will release carbon dioxide. The yeast consumes the sugar as food and produces carbon dioxide gas as there is no space for the gas in the broth. The balloon is placed at the mouth of the bottle. It acts an airlock keeping the contamination out while allowing the carbon dioxide produced to go somewhere else.
Conclusion
Thus, the purpose of the balloon on the glucose-yeast extract broth bottle is to keep the contaminants out and allow the carbon dioxide gas to go somewhere else.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Answer number seven do what it says.
Which of the following is the process that is "capable of destroying all forms of microbial life"?
Question 37 options:
Surgical scrub
Sterilization
Chemical removal
Mechanical removal
After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.)
After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)
Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100%
To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…
Chapter 33 Solutions
Pearson eText for Laboratory Experiments in Microbiology -- Instant Access (Pearson+)
Ch. 33 - What was the purpose of the balloon on the...Ch. 33 - Prob. 2QCh. 33 - Why are yeast colonies larger than bacterial...Ch. 33 - Prob. 4QCh. 33 - Why are antibiotics frequently added to Sabouraud...Ch. 33 - Prob. 2CTCh. 33 - Why werent pathogenic fungi used in this exercise?Ch. 33 - A 45-year-old HIV-positive woman using continuous...Ch. 33 - Prob. 2CA
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What are Clathrin coated vesicles and what is their function?arrow_forwardHow is a protein destined for the Endoplasmic Reticulum (ER), imported into the ER? Be concise.arrow_forwardFind out about the organisations and the movements aimed at the conservation of our natural resources. Eg Chipko movement and Greenpeace. Make a project report on such an organisation.arrow_forward
- What are biofertilizers and mention the significancearrow_forwardPCBs and River Otters: Otters in Washington State’s Green-Duwamish River have high levels of polychlorinated biphenyls (PCBs) in their livers. PCBs can bind to the estrogen receptors in animals and disrupt the endocrine system of these otters. The PCBs seem to increase the estrogen to androgen ratio, skewing the ratio toward too much estrogen. How would increased estrogen affect the river otter population? Based on your reading of the materials in this unit, what factors can affect fertility in humans? Explain how each of the factors affecting human fertility that you described can disrupt the human endocrine system to affect reproduction.arrow_forwardOther than oil and alcohol, are there other liquids you could compare to water (that are liquid at room temperature)? How is water unique compared to these other liquids? What follow-up experiment would you like to do, and how would you relate it to your life?arrow_forward
- Selection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forwardCompetition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forwardSpecies Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forward
- magine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forwardWhat are coupled transporters?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles Of Radiographic Imaging: An Art And A ...Health & NutritionISBN:9781337711067Author:Richard R. Carlton, Arlene M. Adler, Vesna BalacPublisher:Cengage Learning
Principles Of Radiographic Imaging: An Art And A ...
Health & Nutrition
ISBN:9781337711067
Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac
Publisher:Cengage Learning
Serology 101: Testing for IgG and IgM antibodies; Author: Beckman Coulter Dx;https://www.youtube.com/watch?v=LtqKB-qpJrs;License: Standard youtube license