Food Poisoning

Q.

How is food poisoned by microorganisms?

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

Q. Puja is infected with a disease X when she ate contaminated food. She has stomach ache, diarrhoea and has been vomiting frequently. Her doctor gave her Y to fight against the disease.

Identify X and Y.

1. X – Common cold; Y - Vaccine
2. X – Cholera; Y - Vaccine
3. X – Typhoid; Y - Antibiotics
4. X – Tuberculosis; Y - Antibiotics

Q. is a process of preserving food using salt and vinegar.

1. Refrigeration
2. Acidification
3. Pickling

Q. Salmonella and E. coli are examples of bacteria that do not cause food poisoning.

1. False
2. True

Q. Identify the food preservatives.

1. Dry salt
2. Sugar
3. Ketchup
4. Vinegar
5. Oil
6. Water
7. Brine
8. Yeast

Q. Cooking food helps in killing the microorganisms present in it.

1. False
2. True

Q. X is a bacteria that lives symbiotically in the roots of pea plants. Identify X.

1. Rhizobium
2. Nitrosomonas
3. Rhizopus
4. Clostridium

Q. ___ are the most ancient group of ogranisms on Earth.

1. Eubacteria
2. Cyanobacteria
3. Archaebacteria
4. Dinosaurs

Q. Ammonia can be prepared in the lab by the process.

1. Nitrification
2. Pasteur's
3. Haber's

Q. is a process in which nitrates are converted back into nitrogen gas.

1. Nitrification
2. Denitrification
3. Ammonification