Food production：练习题

Yeast is used in the commercial production of bread. Which product of its anaerobic respiration is responsible for causing the dough to rise?

The diagram shows an industrial fermenter used to grow microorganisms. Why is it essential to maintain aseptic conditions inside the fermenter?

In fish farming, why is it common practice to separate fish of different sizes within the same species?

Which of the following micro-organisms is used in the commercial production of yoghurt to ferment milk?

In an industrial fermenter used for the production of penicillin, the temperature must be strictly controlled. What is the primary biological reason for maintaining an optimum temperature?

How do polythene tunnels contribute to an increase in the yield of crops such as strawberries?

Identify one advantage and one disadvantage of using biological control instead of chemical pesticides to manage pests.

Explain the importance of the water cooling jacket in an industrial fermenter used for the large-scale production of penicillin.

A farmer uses a glasshouse to grow tomatoes during the winter.
a) Explain how glasshouses can be used to increase the yield of these crops.
b) Why might a farmer use a polythene tunnel instead of a glasshouse for certain crops?

The diagram shows a fish farming cage used to rear salmon in a loch. The setup includes different nets and a feeding system.
a) Explain how interspecific predation is controlled in this system.
b) Describe how farmers maintain high levels of oxygenation in the water for the fish.