Decaying of Food and Responsible Factors

Q.

When a slice of moist bread is kept in open for few days fungal growth is observed. From where does this fungus come on the bread slice

Q.

How do organisms spoil our food?

1. By destroying the nutrients of food
2. By producing toxic substances
3. By allowing other harmful bacteria to grow on food
4. By injecting poison into the food

Q.

In Antarctica, food rarely gets spoiled. Why?

1. Microbes don't get nutrient-rich food in Antarctica.

2. Extreme low temperatures do not support microbial growth.

3. The salt-rich air in Antarctica is toxic for microbes.

4. Food in Antarctica has antimicrobial property.

Q.

Give reason:

Food processing is an important procedure for obtaining marketable food products.

Q.

Bread kept in a container got spoilt after some days because:

1. Container was made of steel

2. Container was not airtight

3. Bread had inactive fungus

4. Bread was of bad quality

Q.

Grains stored in a jute sack are resistant to decay due to atmospheric moisture.

1. False

2. True

Q. Excess of vegetable oil is added in the preparation of pickle and the pickle jars are salted before the pickle is added into the jar. What is the purpose of doing so?

1. Pastuerization
2. Fermentation
3. Preservation
4. Coagulation

Q. Which of the following is true about using oil to prevent the spoilage of pickles?

1. Oil protects the microbes from the acidity in pickle.
2. Oil provides nutrients to microbes.
3. Oil allows the growth of healthy microorganisms.
4. Oil prevents the growth of microbes.

Q.

In Antarctica, food rarely gets spoiled. Why?

1. Microbes don't get nutrient-rich food in Antarctica.

2. Extreme low temperatures do not support microbial growth.

3. The salt-rich air in Antarctica is toxic for microbes.

4. Food in Antarctica has antimicrobial property.

Q.

Which of the following is/are method(s) used to prevent food decay?

1. Use pure water and pure raw materials

2. Refrigeration of food items

3. Add synthetic chemicals for food colouring

4. Store food substances in a dry place

Q.

Bread kept in a container got spoilt after some days because:

1. Container was made of steel

2. Container was not airtight

3. Bread had inactive fungus

4. Bread was of bad quality