Lab 10: Pasteurization and Sterilization Questions with Correctly Verified Answers

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Lab 10: Pasteurization and Sterilization Questions with Correctly Verified Answers

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2025/2026

Institution BIOS 242/ BIOS242

Course BIOS 242/ BIOS242

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What is shelf life? - Answer Length of time food retains it's taste and nutrition What is your hypothesis regarding their pH value? - Answer After pasteurization the peach juice will have the lowest pH. AT this stage, what is the pH of the various juices? - Answer All juices have similar pH levels. Was your hypothesis correct? - Answer The fresh peach juice has the lowest pH after 3 months. Why does spoiled food become more sour? - Answer Spoilage microbes produce acid.

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Lab 10: Pasteurization and Sterilization
Questions with Correctly Verified Answers
What is shelf life? - Answer Length of time food retains it's taste and nutrition

What is your hypothesis regarding their pH value? - Answer After pasteurization the peach juice will
have the lowest pH.

AT this stage, what is the pH of the various juices? - Answer All juices have similar pH levels.

Was your hypothesis correct? - Answer The fresh peach juice has the lowest pH after 3 months.

Why does spoiled food become more sour? - Answer Spoilage microbes produce acid.

Which technique aims to reduce viable spoilage microorganisms so that they are unlikely to cause
disease? - Answer Pasteurization.

Sterilization aims to destroy all microorganisms including heat resistant microbes and their spores.
Therefore that is the range of severe heat employed in sterilization? - Answer 110-121 C

Click on the peach that has gone through low heat treatment - Answer 3.83

What is your hypothesis regarding the amount of microbes in the samples? - Answer Canned

Which of these microbes can cause food spoilage? - Answer All answers are correct

What are the units to describe the number of viable microbes in a sample? - Answer CFU/ml

Did your hypothesis seem correct? - Answer Yes, canned peach juice has the lowest level of viable
microbes

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Uploaded on: August 10, 2025
Number of pages: 2
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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Lab 10: Pasteurization and Sterilization Questions with Correctly Verified Answers

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