Symbiosis, Lab Experiments in Microbiology
12th Edition
ISBN: 9781256549567
Author: Johnson
Publisher: Pearson Custom Publishing
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Textbook Question
Chapter 12, Problem 1Q
What is the purpose of peptone in the media?
Expert Solution & Answer
Summary Introduction
To describe:
The purpose of peptone in media.
Introduction:
The peptone is a mixture of amino acids and different proteins. This is generally obtained from breaking down the milk, animal tissues and plants.
Explanation of Solution
The microbial growth requires different types of nutrients. The constitution of the nutrient media is designed in such a way that it contains all the vital supplements required for the growth of the organism in a specific condition.
The peptone is made up of animal tissue extracts and plant products. It is rich in protein and amino acid content. The growth of microbes require amino acids and different types of protein, hence, the peptone provides the required amino acids.
Conclusion
The peptone provides the amino acid and proteins for the growth of microbes.
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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 12 Solutions
Symbiosis, Lab Experiments in Microbiology
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