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Exam (elaborations)
Lab 10: Pasteurization and Sterilization Questions with Correctly Verified Answers
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---2August 20252025/2026A+
- 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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Exam (elaborations)
BIOS 242 Exam 3 Questions and Answers Correctly solved to Score A+
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---10August 20252025/2026A+
- what lines of defense are part of innate immunity - Answer - first 
- second 
 
what is the first line of defense - Answer surface protection composed of anatomical and physiological barriers 
 
what are 2 examples of the first line of defense - Answer - physical barriers 
- chemical barriers 
 
what are 2 examples of physical barriers - Answer - skin 
- mucous membranes
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