Question

Most bacteria can be killed by

• A. cooking
• B. refrigeration
• C. freezing
• D. salting

Answer 1

The correct option is A

cooking

The correct option is (A):
Explanation for the correct option:

1. The majority of bacteria will be eliminated if the temperature is high enough and the cooking time is long enough.

Explanation for the incorrect options:

Option (B):

1. Refrigeration at 4°C does not kill bacteria, but it does limit their reproduction rate, keeping food safe for longer.

Option (C):

1. Freezing is a technique to store food at lower temperature and freeze it.
2. Freezing results in the stopping the bacteria from reproducing and not killing it.

Option (D):

1. Chemical preservation techniques like salting is used for the preservation of raw mangoes and tamarind.
2. The shelf life of the food is increased by salt and therefore can be used for longer duration.

Final answer: Most bacteria can be killed by cooking.