Microbiology: An Introduction
Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 6, Problem 5R

By deep-freezing, bacteria can be stored without harm for extended periods. Why do refrigeration and freezing preserve foods?

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As part of an experiment where absorbance values are measured using a spectrophotometer, you are taking readings of your sample every 20 minutes. The non-motile microbe you're testing has a generation time of roughly 20 minutes at an incubation temperature right around room temperature. Things start out fine, with the expected results — as time goes by at the correct incubation temperature, absorbance starts to rise as the medium starts to become more cloudy with growing microorganisms. But roughly 2 hours into the process, you notice that the absorbance levels flatten out, and then start to decrease unexpectedly. What is most likely taking place in your experiment?
What are the main types of immobilization techniques used in biosensors? (with a deep explanation)
Why are petri dishes ALWAYS stored and incubated upside down?   Question 17 options:   a)  helps bacteria grow   b)  the lid is larger and make the dish more stable   c)  prevents condensation from dripping on to agar surface   d)  so the label can be seen

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Microbiology: An Introduction

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