Nutrition and Dietetics MCQs Food science December 26, 2025August 5, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. Which nutrient is essential for the synthesis of hormones and cellular membranes? (A) Carbohydrates (B) Proteins (C) Lipids (D) Vitamins 2. Which vitamin is primarily responsible for calcium absorption in the body? (A) Vitamin A (B) Vitamin D (C) Vitamin C (D) Vitamin B12 3. What is the recommended daily intake of dietary fiber for an average adult? (A) 10-15 grams (B) 20-25 grams (C) 30-35 grams (D) 40-45 grams 4. Which mineral is crucial for maintaining fluid balance and nerve function? (A) Iron (B) Calcium (C) Sodium (D) Magnesium 5. Which macronutrient provides the most energy per gram? (A) Lipids (B) Proteins (C) Carbohydrates (D) Water 6. Which of the following is a good source of complete protein? (A) Quinoa (B) Nuts (C) Beans (D) Rice 7. What is the primary function of carbohydrates in the body? (A) Repair and maintenance of tissues (B) Energy production (C) Hormone synthesis (D) Enzyme function 8. Which type of fat is considered beneficial for heart health? (A) Trans fats (B) Saturated fats (C) Polyunsaturated fats (D) Monounsaturated fats 9. What is the main role of dietary fiber in digestion? (A) Increase nutrient absorption (B) Provide energy (C) Aid in digestion and prevent constipation (D) Enhance flavor 10. Which vitamin is known for its role in immune function and collagen synthesis? (A) Vitamin A (B) Vitamin C (C) Vitamin B6 (D) Vitamin K 11. Which mineral is essential for oxygen transport in the blood? (A) Calcium (B) Iron (C) Potassium (D) Zinc 12. What is the primary function of proteins in the body? (A) Provide energy (B) Regulate metabolism (C) Build and repair tissues (D) Absorb nutrients 13. Which of the following is a high-fiber food? (A) White bread (B) Potato chips (C) Soda (D) Whole grains 14. What is the recommended daily intake of water for an average adult? (A) 2-3 liters (B) 1-2 liters (C) 3-4 liters (D) 4-5 liters 15. Which vitamin is essential for blood clotting? (A) Vitamin A (B) Vitamin B12 (C) Vitamin C (D) Vitamin K 16. Which nutrient is known to improve skin health and vision? (A) Vitamin D (B) Vitamin E (C) Vitamin B12 (D) Vitamin A 17. What is the primary function of antioxidants in the diet? (A) Provide energy (B) Aid in digestion (C) Protect cells from damage (D) Enhance flavor 18. Which of the following foods is a good source of omega-3 fatty acids? (A) Salmon (B) Beef (C) Chicken (D) Eggs 19. Which carbohydrate is known for its slow release of energy and is beneficial for sustained energy levels? (A) Simple sugars (B) Complex carbohydrates (C) Saturated fats (D) Trans fats 20. What is the role of cholesterol in the body? (A) Provide energy (B) Build cell membranes and produce hormones (C) Aid in digestion (D) Improve taste 21. Which of the following is a common source of vitamin B12? (A) Leafy greens (B) Dairy products (C) Citrus fruits (D) Whole grains 22. What is the recommended dietary allowance (RDA) for protein intake for an average adult? (A) 0.5 grams per kg of body weight (B) 1.0 grams per kg of body weight (C) 0.8 grams per kg of body weight (D) 1.5 grams per kg of body weight 23. Which nutrient is critical for the formation of red blood cells? (A) Vitamin C (B) Calcium (C) Iron (D) Zinc 24. Which type of diet is most likely to be deficient in vitamin B12? (A) Vegetarian diet (B) Mediterranean diet (C) Ketogenic diet (D) High-protein diet 25. Which of the following is a primary source of saturated fats? (A) Olive oil (B) Butter (C) Avocados (D) Nuts 26. What is the role of magnesium in the diet? (A) All of the above (B) Muscle function (C) Nerve function (D) Bone health 27. Which food is a good source of potassium? (A) Bananas (B) Apples (C) Carrots (D) Rice 28. Which nutrient is crucial for the synthesis of collagen in the body? (A) Vitamin D (B) Vitamin C (C) Vitamin E (D) Vitamin K 29. What is the primary function of the mineral zinc in the diet? (A) Fluid balance (B) Bone health (C) Protein synthesis (D) Energy production 30. Which dietary component helps regulate blood sugar levels? (A) Cholesterol (B) Saturated fat (C) Simple sugars (D) Fiber 31. Which of the following is NOT a function of dietary fats? (A) Energy storage (B) Insulation (C) Fiber provision (D) Hormone production 32. Which vitamin is synthesized by the body when exposed to sunlight? (A) Vitamin D (B) Vitamin C (C) Vitamin A (D) Vitamin E 33. What is the recommended daily intake of calcium for adults aged 19-50? (A) 500 mg (B) 1000 mg (C) 800 mg (D) 1200 mg 34. Which food group is a primary source of vitamin A? (A) Fruits (B) Grains (C) Dairy products (D) Vegetables 35. What is the primary role of folic acid in the diet? (A) DNA synthesis (B) Bone health (C) Immune function (D) Muscle repair 36. Which of the following is a low-glycemic index food? (A) White bread (B) Potato chips (C) Candy (D) Brown rice 37. Which macronutrient should be the primary source of energy for endurance athletes? (A) Fats (B) Proteins (C) Vitamins (D) Carbohydrates 38. What is the main dietary source of vitamin B6? (A) Grains (B) Dairy (C) Fruits (D) Meat 39. Which nutrient helps to transport fat-soluble vitamins in the body? (A) Water (B) Proteins (C) Fats (D) Carbohydrates 40. What is the primary purpose of a balanced diet? (A) To improve taste (B) To ensure adequate intake of all essential nutrients (C) To increase calorie intake (D) To reduce water consumption 41. Which type of dietary fat should be consumed in moderation to maintain heart health? (A) Polyunsaturated fats (B) Monounsaturated fats (C) Unsaturated fats (D) Saturated fats 42. What is the primary benefit of consuming probiotics? (A) Enhanced muscle growth (B) Increased energy levels (C) Improved digestion and gut health (D) Improved vision 43. Which of the following vitamins is essential for energy metabolism? (A) Vitamin A (B) Vitamin C (C) Vitamin B complex (D) Vitamin K 44. Which nutrient is important for maintaining healthy skin and hair? (A) Vitamin C (B) Vitamin E (C) Vitamin A (D) Vitamin D 45. Which of the following is a key component of a heart-healthy diet? (A) High saturated fat (B) Low fiber (C) High in fruits and vegetables (D) High in refined sugars 46. Which mineral supports thyroid function and metabolism? (A) Iodine (B) Iron (C) Calcium (D) Zinc 47. What is the recommended amount of physical activity for maintaining overall health? (A) 30 minutes a week (B) 30 minutes a day, most days of the week (C) 1 hour a day, every day (D) 2 hours a week 48. Which food is a good source of selenium? (A) Whole wheat bread (B) Apples (C) Spinach (D) Fish 49. What is the primary concern associated with excessive sodium intake? (A) Improved digestion (B) Increased risk of heart disease (C) Enhanced energy levels (D) Better skin health 50. Which nutrient is critical for bone health and often combined with calcium in supplements? (A) Magnesium (B) Vitamin D (C) Potassium (D) Iron