Understanding Protein Denaturation in Foods

What is denaturation in the context of proteins?

• The process of proteins gaining their natural structure.

• The process where proteins lose their natural structure due to external factors.

• The process of proteins multiplying in number.

• The process of proteins changing colour.

Which of the following is an example of protein denaturation due to heat?

• Freezing an egg.

• Cooking an egg.

• Refrigerating milk.

• Drying meat.

What happens to the proteins in milk when it is heated during the process of making cheese or yogurt?

• They evaporate.

• They denature and coagulate.

• They dissolve completely.

• They remain unchanged.

How does cooking meat affect its proteins?

• It makes the proteins more flexible.

• It denatures the proteins, changing the texture and colour.

• It causes the proteins to disappear.

• It makes the proteins liquid.

What is the effect of cooking on fish proteins?

• It makes them more transparent.

• It denatures them, leading to a change in texture and colour.

• It causes them to freeze.

• It makes them sweeter.

In the process of making yogurt, what causes the proteins in milk to denature?

• The addition of sugar.

• The acid produced by bacteria.

• The removal of fat.

• The addition of salt.

What type of denaturation occurs when making meringue from egg whites?

• Thermal denaturation.

• Chemical denaturation.

• Mechanical denaturation.

• Biological denaturation.

Which of the following is NOT a factor that can cause protein denaturation?

• Heat.

• Acidity.

• Mechanical action.

• Freezing.

What is the result of protein denaturation in terms of food texture?

• It makes food more liquid.

• It often makes food firmer and changes its texture.

• It makes food sweeter.

• It makes food more colourful.

Which of the following foods involves protein denaturation through mechanical action?

• Grilled fish.

• Beaten egg whites for meringue.

• Boiled milk.

• Roasted meat.