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Food production

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Question 74

Yoghurt is a nutritious fermented dairy product.

a.

Explain why milk is heated to a high temperature (pasteurised) at the start of the yoghurt-making process.

[2]
b.

The pasteurised milk is cooled to a warm temperature before the Lactobacillus bacteria are added. Explain why this cooling step is necessary.

[2]
c.

Yoghurt is often fortified with vitamins. Give one benefit of including Vitamin D in the diet.

[1]
d.

Low-fat yoghurt is a popular dietary choice. Give one benefit of choosing low-fat yoghurt over full-fat yoghurt.

[1]
e.

Explain why the fermentation process causes the yoghurt mixture to become more acidic (lower pH) and semi-solid.

[2]
f.

Some manufacturers add whole oats (grains) to yoghurt. Suggest the health benefits of adding oats to yoghurt.

[2]

Food production Questions

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