Question

D. Give reasons for each of the following.
1. We should keep distance from a person infected with common cold.
2. We should maintain proper hygiene.
3. Oil and vinegar are added to pickles.
4. Yeast is added to cake batter.
5.Penicillin was known as wonder drug.​

Answer 1

Answer:

1. When someone coughs or sneezes, they spray small liquid droplets from their nose or mouth which may contain virus. If you are too close, you can breathe in the droplets, including the COVID-19 virus if the person coughing has the disease.
2. This means covering your mouth and nose with your bent elbow or tissue when you cough or sneeze. Then dispose of the used tissue immediately since the droplets spread virus.
3. Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment. Vegetables, fruits, fish and meat are often preserved by this method.
4. Yeast proves a batter or dough by converting sugars into gas, carbon dioxide (fermentation). This gas creates the little air bubbles in your bread or cake. ... This is because the batter needs a bit more structure to hold on to that air
5. But the drug's accidental discovery in the late 1920s ushered in a new age of medicine. Penicillin was hailed as a "miracle drug" that could save lives and effectively treat a variety of infectious diseases.

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Answer 2

Answer:

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