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Biochemical Testing for Microbial Identification - Carbohydrate Fermentation Testing

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Biochemical Testing for Microbial Identification - Carbohydrate Fermentation Testing

Hands-On Labs, Inc.           
Version 42-0241-00-03

Lab Report Assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

 

Exercise 1: Carbohydrate Fermentation Testing

Data Table 1. Carbohydrate Fermentation Test Results.

Vial

Photograph

Observation

Result

#1 S. cerevisiae

Glucose

 

 

 

 

#1 S. epidermidis

Glucose

 

 

 

#2 S. cerevisiae Fructose

 

 

 

#2 S. epidermidis Fructose

 

 

 

#3 S. cerevisiae Mannitol

 

 

 

#3 S. epidermidis Mannitol

 

 

 

 

 

 

 

Questions

  1. A.       Why are biochemical tests used to identify microbes?
  2. B.       What is fermentation? What are some common products of carbohydrate fermentation?
  3. C.       How are Durham tubes used to measure gas production in carbohydrate fermentation tests?
  4. D.      Do S. cerevisiae and S. epidermidis ferment based on your experimental results? Mention specific end-products depending on the types of carbohydrates (glucose, fructose, and mannitol).

 

 

Product Reviews

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  1. Awesome 5 Star Review

    Posted by on 17th Apr 2017

    The answers are brief but straight to the point. I got an A on my report. It's lead me to use them again.

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