10 Questions
What is the optimal pH for the growth of most foodborne bacteria?
About 7
What is the pH of a substance with a hydrogen ion concentration of 10^(-7) M?
7
Which of the following microorganisms is most likely to grow at a pH of 4.5?
Yeast
What is the minimum pH at which Clostridium can grow?
4.6
What happens to the growth rate of microorganisms when the pH is not equal to the optimal pH?
It declines
At what pH does the growth rate of microorganisms decline?
When pH is not equal to pHopt
What is the term for a microorganism that grows optimally at a pH of 7?
Neutralophile
What is the optimum pH for the growth of yeast?
About 4.5
What is the relation between pH and hydrogen ion concentration?
pH is inversely proportional to hydrogen ion concentration
What is the optimum pH for the growth of moulds?
About 3.5
Test your understanding of microbial growth and its relation to pH levels. Learn how different microorganisms respond to varying pH levels and how it affects their growth rates. This quiz is part of the Food Microbiology course by Prof. Marcel Zwietering at Wageningen University.
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