Worksheet 20

Evaluation:

Circle the correct answers.

1. Meat stays fresh for a longer period when kept in a refrigerator because

the low temperature _____________________.

A. dries up the bacteria

B. kills all the microorganisms

C. makes the bacteria less active

D. reduces the water content in the meat

2. Which of the following statements is not true about the microorganisms?

A. Microorganisms live well in acidic solution

B. Microorganisms will die in highly acidic conditions

C. Microorganisms reproduce actively in neutral conditions

D. Microorganisms do not reproduce in low acidity conditions

3. Microorganisms reproduce rapidly in places that are __________________.

I. dry

II. hot

III. dark

IV. humid

A. I and II B. I and IV

C. II and III D. III and IV

Choose True or False for the statements below.

1. Without water in food, bacteria and fungi can grow.

True

False

2. Microorganisms cannot grow in a low acidic medium.

True

False

3. Microorganisms cannot grow in food which is soaked in vinegar because

vinegar is an acidic solution.

True

False

4. When food is boiled, all microorganisms will be killed.

True

False

5. Microorganisms grow well in dry and cold conditions.

True

False