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Food production

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Question 79

The diagram below shows a large-scale industrial bioreactor used to culture microorganisms for the commercial production of food-related biomolecules.

Industrial Bioreactor Diagram

a.

Describe how the outer water jacket is used to regulate the temperature of the culture medium.

[2]
b.

Explain why allowing the internal temperature to rise significantly above the optimum level would lead to a decrease in the rate of product formation.

[2]
c.

Explain how the stirring impeller (paddles) helps to maintain a high rate of aerobic respiration in the growing culture.

[2]
d.

Identify one variable, other than temperature, that must be kept constant within the bioreactor, and explain the biological consequence of failing to control it.

[2]
e.

Name one specific commercial food product or food-industry enzyme produced using this type of bioreactor technology.

[1]

Food production Questions

  1. IGCSE
  2. /Biology
  3. /Food production