Laboratory Experiments in Microbiology (11th Edition)
11th Edition
ISBN: 9780321994936
Author: Ted R. Johnson, Christine L. Case
Publisher: PEARSON
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Chapter 3, Problem 1CT
Did all the organisms living in or on the environments sampled grow on your nutrient agar? Briefly explain.
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A microorganism was cultured in batches, with glucose as a carbon source and ammonia as a nitrogen source, under aerobic conditions. Only biomass was formed. The data obtained are presented in Table 1. It is requested:
a) Calculate the maximum specific growth velocity;
b) Calculate the generation time and the number of generations at the end of the exponential phase;
c) Calculate the apparent biomass yield coefficient
Which of these are known to host chemosynthetic communities?
a) Hydrothermal vent
O b) Hydrocarbon seep
c) Hypersaline seep
d) All of the above.
Is generation time a useful parameter to indicate the types of mediabest suited to support the growth of a specific organism? Explain.
Chapter 3 Solutions
Laboratory Experiments in Microbiology (11th Edition)
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- Is nutrient agar (NA) a complex or defined medium? Explained based on its composition. Is NA a differential, selective, neither differential nor selective media? Explaining based on what kind of Organism it allows to grow?arrow_forwardWhat is the value of monitoring changes in microbial abundance and diversity as a function of varied storage conditions?arrow_forwardWhy is nitrification a good example of a commensalistic process?arrow_forward
- Why are there so many antibiotic-producing organisms in soils?Explain itarrow_forwardHow can a microbial ecologist be sure that transformation of aradioisotope is actually caused by microbes?arrow_forwardIn simpler terms explain Lag, Log, Stationary, and Death Phase in the Microbial Growth Curve?arrow_forward
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