Bacterial Quality of a Sample of Milk (Leaving Cert Agricultural Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the resazurin test assess in milk samples?
What does the resazurin test assess in milk samples?
Bacterial quality
What temperature should the water bath be set at for the resazurin test?
What temperature should the water bath be set at for the resazurin test?
How much milk is added to each test tube?
How much milk is added to each test tube?
10ml
How much resazurin solution is added to each tube?
How much resazurin solution is added to each tube?
1ml
How long are the test tubes left in the water bath?
How long are the test tubes left in the water bath?
10 minutes
Which milk sample typically shows the most significant color change?
Which milk sample typically shows the most significant color change?
Stale pasteurised milk
What should fresh pasteurised milk show in the resazurin test?
What should fresh pasteurised milk show in the resazurin test?
Little to no color change
What type of indicator is resazurin?
What type of indicator is resazurin?
Redox indicator
What does a blue color indicate in the resazurin test?
What does a blue color indicate in the resazurin test?
High oxygen, few bacteria
Why do bacteria cause the resazurin to change color?
Why do bacteria cause the resazurin to change color?
They consume oxygen