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Microbial Growth: Intrinsic Factors - pH and Preservation

10 Questions

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Microbial Growth: Intrinsic Factors - pH and Preservation

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Questions and Answers

What is the optimal pH for the growth of most foodborne bacteria?

About 7 (correct)

About 3.5

About 4.5

About 10

What is the pH of a substance with a hydrogen ion concentration of 10^(-7) M?

7 (correct)

Which of the following microorganisms is most likely to grow at a pH of 4.5?

Bacteria

Yeast (correct)

Moulds

All of the above

What is the minimum pH at which Clostridium can grow?

4.6 Signup and view all the answers

What happens to the growth rate of microorganisms when the pH is not equal to the optimal pH?

It declines Signup and view all the answers

At what pH does the growth rate of microorganisms decline?

When pH is not equal to pHopt Signup and view all the answers

What is the term for a microorganism that grows optimally at a pH of 7?

Neutralophile Signup and view all the answers

What is the optimum pH for the growth of yeast?

About 4.5 Signup and view all the answers

What is the relation between pH and hydrogen ion concentration?

pH is inversely proportional to hydrogen ion concentration Signup and view all the answers

What is the optimum pH for the growth of moulds?

About 3.5 Signup and view all the answers