Disease-Causing Microorganisms in Humans
1. What are microorganisms that cause diseases called?
• (A) Probiotics
• (B) Pathogens
• (C) Antibiotics
• (D) Vaccines
2. Which of the following diseases is caused by a virus?
• (A) Tuberculosis
• (B) Cholera
• (C) Polio
• (D) Typhoid
3. Which of the following diseases is caused by bacteria?
• (A) Influenza
• (B) Tuberculosis
• (C) Malaria
• (D) Dengue
4. How do disease-causing microorganisms enter the human body?
• (A) Through air, water, food, and physical contact
• (B) Only through skin wounds
• (C) Only through the bloodstream
• (D) Only through vaccination
5. Which insect spreads malaria?
• (A) Housefly
• (B) Mosquito
• (C) Honeybee
• (D) Butterfly
6. Which microorganism causes malaria?
• (A) Virus
• (B) Protozoa
• (C) Bacteria
• (D) Fungi
7. Which disease is caused by contaminated water?
• (A) Tuberculosis
• (B) Cholera
• (C) Common cold
• (D) Ringworm
8. What should be done to prevent the spread of communicable diseases?
• (A) Eat uncovered food
• (B) Wash hands regularly and maintain hygiene
• (C) Avoid vaccination
• (D) Drink unclean water
Answers and Explanation for Disease-Causing Microorganisms in Humans
1. (B) Pathogens are microorganisms that cause diseases.
2. (C) Polio is caused by a virus.
3. (B) Tuberculosis is caused by bacteria.
4. (A) Pathogens enter the human body through air, water, food, and physical contact.
5. (B) Mosquitoes spread malaria.
6. (B) Protozoa cause malaria.
7. (B) Cholera is caused by contaminated water.
8. (B) Washing hands and maintaining hygiene prevent communicable diseases.
Food Poisoning
9. What is food poisoning caused by?
• (A) Overeating
• (B) Consumption of food contaminated by microorganisms
• (C) Lack of exercise
• (D) Excessive salt in food
10. Which microorganisms commonly cause food poisoning?
• (A) Bacteria and fungi
• (B) Protozoa and algae
• (C) Viruses and worms
• (D) Yeast and protozoa
11. What happens when a person consumes contaminated food?
• (A) They gain weight
• (B) They may suffer from vomiting, diarrhea, and stomach pain
• (C) Their eyesight improves
• (D) They become more energetic
12. How can food poisoning be prevented?
• (A) Eating uncovered food
• (B) Storing food properly and cooking it well
• (C) Keeping food in open areas
• (D) Eating spoiled food
13. Which of the following conditions can lead to food spoilage?
• (A) Storing food at very high temperatures
• (B) Keeping food in damp and unhygienic conditions
• (C) Storing food in airtight containers
• (D) Cooking food thoroughly
14. Which of the following is a symptom of food poisoning?
• (A) Fever
• (B) Stomach cramps
• (C) Vomiting
• (D) All of the above
Answers and Explanation for Food Poisoning
9. (B) Food poisoning occurs due to contaminated food.
10. (A) Bacteria and fungi commonly cause food poisoning.
11. (B) Contaminated food can cause vomiting, diarrhea, and stomach pain.
12. (B) Proper food storage and cooking prevent food poisoning.
13. (B) Damp and unhygienic conditions promote food spoilage.
14. (D) Fever, stomach cramps, and vomiting are symptoms of food poisoning.
Food Preservation
15. Why is food preservation important?
• (A) To make food tastier
• (B) To prevent food from spoiling
• (C) To increase food weight
• (D) To remove nutrients from food
16. Which of the following is a common method of food preservation?
• (A) Adding preservatives
• (B) Keeping food in the sun for long hours
• (C) Using contaminated water for cooking
• (D) Leaving food open overnight
17. What is the function of preservatives in food?
• (A) To speed up food spoilage
• (B) To kill all nutrients in food
• (C) To increase the shelf life of food
• (D) To make food unhealthy
18. Which of the following is a natural food preservative?
• (A) Vinegar
• (B) Plastic
• (C) Petrol
• (D) Glass
19. How does refrigeration help in food preservation?
• (A) By drying food completely
• (B) By killing all microorganisms
• (C) By slowing down the growth of microorganisms
• (D) By adding extra nutrients to food
20. Which method is used to preserve fruits and vegetables for a long time?
• (A) Adding chemicals
• (B) Keeping them in plastic bags
• (C) Drying or pickling them
• (D) Washing them frequently
21. What is pasteurization?
• (A) A method to sterilize medical tools
• (B) A method to heat milk to kill harmful bacteria and then cool it quickly
• (C) A method to make food more colorful
• (D) A method to freeze food instantly
22. Which of the following is a food item commonly preserved by adding salt?
• (A) Milk
• (B) Fish
• (C) Ice cream
• (D) Rice
23. What is the purpose of adding sugar in food preservation?
• (A) To change its color
• (B) To reduce moisture and prevent microbial growth
• (C) To make it taste bitter
• (D) To make it spoil faster
24. Which of the following food items is preserved using vinegar?
• (A) Meat
• (B) Pickles
• (C) Rice
• (D) Wheat
Answers and Explanation for Food Preservation
15. (B) Food preservation prevents spoilage.
16. (A) Adding preservatives is a method of food preservation.
17. (C) Preservatives increase the shelf life of food.
18. (A) Vinegar is a natural preservative.
19. (C) Refrigeration slows down microbial growth.
20. (C) Fruits and vegetables can be dried or pickled for preservation.
21. (B) Pasteurization involves heating milk to kill bacteria and then cooling it.
22. (B) Salt is used to preserve fish.
23. (B) Sugar reduces moisture and prevents microbial growth.
24. (B) Pickles are preserved using vinegar.
This MCQ set covers Disease-Causing Microorganisms in Humans, Food Poisoning, and Food Preservation, with answers and explanations at the end of each section. Let me know if you need any modifications!
