Probiotics and prebiotics MCQs December 27, 2025August 2, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. What are probiotics? (A) Non-digestible fibers (B) Live microorganisms that provide health benefits (C) Synthetic vitamins (D) Hormones that aid digestion 2. Which of the following is a common probiotic bacterium? (A) Escherichia coli (B) Lactobacillus acidophilus (C) Staphylococcus aureus (D) Salmonella enterica 3. What is a prebiotic? (A) A type of probiotic (B) A non-digestible food ingredient that promotes the growth of beneficial bacteria (C) A live culture of bacteria (D) An enzyme that aids digestion 4. Which of the following is a common prebiotic? (A) Lactobacillus rhamnosus (B) Bifidobacterium bifidum (C) Inulin (D) Saccharomyces cerevisiae 5. Which of the following foods is a good source of probiotics? (A) Yogurt (B) Garlic (C) Broccoli (D) Apples 6. Which strain of probiotic is commonly found in fermented dairy products? (A) Lactobacillus reuteri (B) Bifidobacterium longum (C) Streptococcus thermophilus (D) Lactobacillus bulgaricus 7. Which of the following is NOT a benefit commonly associated with probiotics? (A) Enhanced digestion (B) Improved immune function (C) Increased risk of bacterial infections (D) Reduced symptoms of irritable bowel syndrome (IBS) 8. Which prebiotic is commonly used to improve gut health? (A) Fiber (B) Vitamin C (C) Zinc (D) Lactulose 9. What is the primary role of prebiotics in the digestive system? (A) To directly kill pathogenic bacteria (B) To provide energy for cells (C) To aid in the absorption of vitamins (D) To stimulate the growth of beneficial gut bacteria 10. Which of the following foods is a good source of both probiotics and prebiotics? (A) Bananas (B) Milk (C) Cheese (D) Whole grains 11. What is the common method used to produce probiotic yogurt? (A) Pasteurization (B) Hydrogenation (C) Fermentation (D) Dehydration 12. Which probiotic strain is known for its ability to survive passage through the gastrointestinal tract? (A) Lactobacillus plantarum (B) Lactobacillus casei (C) Lactobacillus reuteri (D) Bifidobacterium bifidum 13. Which of the following is a benefit of consuming prebiotics? (A) Reduces cholesterol levels (B) Increases blood pressure (C) Causes weight gain (D) Enhances the growth of beneficial gut bacteria 14. Which type of fiber is classified as a prebiotic? (A) Lignin (B) Insoluble fiber (C) Cellulose (D) Soluble fiber 15. What effect do probiotics have on lactose intolerance? (A) They completely cure lactose intolerance (B) They have no effect on lactose intolerance (C) They help break down lactose, reducing symptoms (D) They increase symptoms of lactose intolerance 16. Which food is typically fortified with probiotics? (A) White bread (B) Pasta (C) Orange juice (D) Butter 17. Which bacteria are typically involved in the production of sauerkraut? (A) Lactobacillus plantarum (B) Bifidobacterium bifidum (C) Streptococcus thermophilus (D) Bacillus subtilis 18. Which type of carbohydrate is NOT considered a prebiotic? (A) Lactose (B) Galactooligosaccharides (C) Fructooligosaccharides (D) Inulin 19. Which food is rich in inulin? (A) Onions (B) Beef (C) Chicken (D) Eggs 20. What role do probiotics play in the immune system? (A) They suppress immune responses (B) They have no effect on the immune system (C) They destroy immune cells (D) They enhance immune responses 21. Which of the following is NOT a common source of prebiotics? (A) Oats (B) Apples (C) White rice (D) Garlic 22. Which strain of probiotics is often used to treat diarrhea? (A) Streptococcus thermophilus (B) Lactobacillus acidophilus (C) Bifidobacterium infantis (D) Lactobacillus reuteri 23. Which health condition can be improved by consuming prebiotics? (A) Constipation (B) Osteoporosis (C) Diabetes (D) Asthma 24. Which of the following foods is a rich source of probiotics and prebiotics? (A) Almonds (B) Yogurt with added fiber (C) Ice cream (D) Red meat 25. Which of the following probiotics is known for its use in treating irritable bowel syndrome (IBS)? (A) Bifidobacterium longum (B) Lactobacillus plantarum (C) Lactobacillus casei (D) Lactobacillus acidophilus 26. Which of the following is a characteristic of prebiotics? (A) They are destroyed by heat (B) They are digestible by humans (C) They inhibit the growth of probiotics (D) They are fermented by beneficial gut bacteria 27. Which probiotic strain is often used in dairy products like yogurt and kefir? (A) Lactobacillus reuteri (B) Bifidobacterium bifidum (C) Streptococcus salivarius (D) Lactobacillus acidophilus 28. Which food is a common source of probiotics found in Asian diets? (A) Croissants (B) Pizza (C) Pasta (D) Kimchi 29. Which type of food is least likely to contain prebiotics? (A) Whole grains (B) Refined sugars (C) Fruits and vegetables (D) Legumes 30. Which enzyme do probiotics help to break down in the digestive system? (A) Amylase (B) Lipase (C) Pepsin (D) Lactase 31. Which of the following is NOT a benefit of consuming prebiotics? (A) Increased muscle mass (B) Reduced inflammation (C) Improved gut health (D) Enhanced absorption of minerals 32. Which probiotic is associated with reducing symptoms of irritable bowel syndrome (IBS)? (A) Lactobacillus plantarum (B) Bifidobacterium longum (C) Lactobacillus reuteri (D) Saccharomyces boulardii 33. Which food is rich in both probiotics and prebiotics? (A) Whole grain cereal with yogurt (B) Chicken breast (C) White rice (D) French fries 34. Which probiotic strain is commonly found in fermented milk products? (A) Lactobacillus reuteri (B) Lactobacillus bulgaricus (C) Lactobacillus rhamnosus (D) Lactobacillus casei 35. Which food is an example of a prebiotic-rich vegetable? (A) Carrots (B) Onions (C) Potatoes (D) Lettuce 36. Which microorganism is often used in the production of kefir? (A) Lactobacillus acidophilus (B) Bifidobacterium bifidum (C) Lactobacillus kefiri (D) Streptococcus thermophilus 37. Which of the following is a common prebiotic supplement? (A) Iron (B) Vitamin D (C) Psyllium husk (D) Calcium 38. Which of the following is NOT a type of prebiotic fiber? (A) Fructooligosaccharides (B) Polysaccharides (C) Cellulose (D) Galactooligosaccharides 39. Which type of dietary fiber has prebiotic effects? (A) Insoluble fiber (B) Soluble fiber (C) Both soluble and insoluble fiber (D) None of the above 40. Which strain of probiotics is known for its role in reducing diarrhea in infants? (A) Lactobacillus reuteri (B) Bifidobacterium bifidum (C) Lactobacillus casei (D) Lactobacillus acidophilus 41. Which food is a traditional source of probiotics in Japanese cuisine? (A) Miso (B) Sushi (C) Ramen (D) Tempura 42. Which probiotic strain is often added to dietary supplements for gut health? (A) Lactobacillus acidophilus (B) Bacillus coagulans (C) Bifidobacterium lactis (D) All of the above 43. Which type of fiber is classified as a prebiotic in the human diet? (A) All of the above (B) Cellulose (C) Hemicellulose (D) Pectin 44. What is the role of prebiotics in managing blood sugar levels? (A) They improve insulin sensitivity (B) They lower blood sugar directly (C) They increase blood sugar (D) They have no effect on blood sugar levels 45. Which bacteria are used in the production of probiotic milk drinks? (A) Lactobacillus and Streptococcus (B) Bifidobacterium and Lactobacillus (C) Saccharomyces and Candida (D) Lactobacillus and Saccharomyces 46. Which food product is enriched with both probiotics and prebiotics? (A) Yogurt with added fiber (B) Cheese (C) Ice cream (D) Fruit juice 47. Which strain of probiotic is used to help with urinary tract infections (UTIs)? (A) Lactobacillus rhamnosus (B) Lactobacillus casei (C) Bifidobacterium bifidum (D) Lactobacillus reuteri 48. Which food is a rich source of the prebiotic fiber called pectin? (A) Rice (B) Beef (C) Apples (D) Potatoes 49. What is the primary function of prebiotics in the human digestive system? (A) To digest proteins (B) To increase energy levels (C) To reduce inflammation (D) To support the growth of beneficial gut bacteria 50. Which type of probiotic is used to promote vaginal health? (A) Lactobacillus acidophilus (B) Lactobacillus reuteri (C) Bifidobacterium longum (D) Lactobacillus plantarum