Carbohydrates MCQs December 27, 2025August 2, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. What is the basic building block of carbohydrates? (A) Amino acids (B) Fatty acids (C) Monosaccharides (D) Nucleotides 2. Which of the following is a disaccharide? (A) Glucose (B) Sucrose (C) Fructose (D) Starch 3. Which carbohydrate is commonly known as table sugar? (A) Lactose (B) Maltose (C) Sucrose (D) Glucose 4. Which polysaccharide is primarily used for energy storage in animals? (A) Starch (B) Cellulose (C) Chitin (D) Glycogen 5. Which carbohydrate is a major component of plant cell walls? (A) Glycogen (B) Cellulose (C) Starch (D) Chitin 6. Which monosaccharide is known as blood sugar? (A) Galactose (B) Glucose (C) Fructose (D) Sucrose 7. Which carbohydrate is found in milk and dairy products? (A) Lactose (B) Fructose (C) Glucose (D) Maltose 8. What is the primary function of carbohydrates in the diet? (A) Building muscle (B) Enhancing vision (C) Repairing tissues (D) Providing energy 9. Which type of carbohydrate is considered a simple sugar? (A) Starch (B) Monosaccharide (C) Cellulose (D) Glycogen 10. What is the main difference between starch and cellulose? (A) Starch is digestible by humans, while cellulose is not. (B) Starch is a disaccharide, while cellulose is a polysaccharide. (C) Cellulose is found in animal tissues, while starch is found in plants. (D) Both starch and cellulose are composed of the same monomers. 11. Which enzyme is responsible for breaking down starch into maltose? (A) Amylase (B) Lactase (C) Sucrase (D) Lipase 12. In which organ does carbohydrate digestion begin? (A) Stomach (B) Small intestine (C) Mouth (D) Liver 13. Which carbohydrate is used as a sweetener in many processed foods? (A) Cellulose (B) Sucrose (C) Glycogen (D) Starch 14. What type of carbohydrate is found in whole grains and legumes and is beneficial for digestive health? (A) Fiber (B) Polysaccharides (C) Simple sugars (D) Disaccharides 15. Which of the following is not a carbohydrate? (A) Glucose (B) Fructose (C) Insulin (D) Galactose 16. Which carbohydrate is found in the cell walls of fungi and insects? (A) Cellulose (B) Glycogen (C) Starch (D) Chitin 17. Which form of carbohydrate is stored in the liver and muscles for energy use? (A) Glycogen (B) Cellulose (C) Starch (D) Lactose 18. Which type of carbohydrate cannot be digested by humans but aids in digestion? (A) Glucose (B) Cellulose (C) Sucrose (D) Maltose 19. Which carbohydrate is primarily found in fruits and honey? (A) Galactose (B) Lactose (C) Fructose (D) Maltose 20. Which enzyme is responsible for the digestion of lactose? (A) Lactase (B) Amylase (C) Sucrase (D) Maltase 21. Which carbohydrate provides quick energy and is often used by athletes during high-intensity exercise? (A) Cellulose (B) Glycogen (C) Starch (D) Sucrose 22. The process by which glucose is converted into energy in cells is called: (A) Hydrolysis (B) Photosynthesis (C) Fermentation (D) Glycolysis 23. Which carbohydrate is commonly used as a food thickener and is derived from seaweed? (A) Chitin (B) Cellulose (C) Pectin (D) Agar 24. Which of the following carbohydrates is a major storage form of glucose in plants? (A) Glycogen (B) Cellulose (C) Chitin (D) Starch 25. What is the primary function of fiber in the diet? (A) Increase caloric intake (B) Provide immediate energy (C) Aid in digestion and prevent constipation (D) Enhance protein synthesis 26. Which carbohydrate is often added to foods as a bulking agent or to provide texture? (A) Starch (B) Sucrose (C) Glucose (D) Fructose 27. The term “complex carbohydrates” refers to: (A) Simple sugars like glucose and fructose (B) Disaccharides like sucrose and lactose (C) Polysaccharides like starch and cellulose (D) All types of carbohydrates 28. Which carbohydrate is known for its use as a gel-forming agent in jellies and jams? (A) Pectin (B) Cellulose (C) Starch (D) Glycogen 29. What is the primary difference between starch and cellulose in terms of human digestion? (A) Starch is easily digestible, while cellulose is not. (B) Cellulose is easily digestible, while starch is not. (C) Both starch and cellulose are equally digestible. (D) Neither starch nor cellulose is digestible. 30. Which carbohydrate is a component of nucleic acids and plays a role in cellular energy transfer? (A) Ribose (B) Glucose (C) Fructose (D) Sucrose 31. What type of carbohydrate is commonly found in beans, lentils, and other legumes? (A) Simple sugars (B) Fiber (C) Starch (D) Glycogen 32. Which carbohydrate is associated with causing spikes in blood glucose levels due to its rapid digestion and absorption? (A) Simple carbohydrates (B) Complex carbohydrates (C) Fiber (D) Cellulose 33. The presence of which carbohydrate in the diet is most likely to lead to increased blood glucose levels? (A) Fiber (B) Starch (C) Sucrose (D) Lactose 34. Which carbohydrate source is often recommended for sustained energy release throughout the day? (A) Refined sugars (B) White bread (C) Whole grains (D) Soft drinks 35. Which of the following carbohydrates is classified as a non-nutritive sweetener? (A) Aspartame (B) Sucrose (C) Lactose (D) Fructose 36. Which carbohydrate is the primary source of energy for the brain under normal conditions? (A) Protein (B) Glucose (C) Glycogen (D) Fat 37. Which of the following is an example of a high-fiber carbohydrate source? (A) White rice (B) Potato chips (C) Candy (D) Whole wheat bread 38. Which carbohydrate can be found in a variety of fruits and is known for its sweet taste? (A) Glucose (B) Lactose (C) Fructose (D) Maltose 39. Which form of carbohydrate is most commonly used in the production of alcoholic beverages? (A) Starch (B) Maltose (C) Cellulose (D) Sucrose 40. What term describes the process by which carbohydrates are broken down into glucose for energy? (A) Glycolysis (B) Glycogenesis (C) Gluconeogenesis (D) Gluconeogenesis 41. Which enzyme breaks down maltose into two glucose molecules? (A) Maltase (B) Sucrase (C) Lactase (D) Amylase 42. Which type of carbohydrate is known to provide the most lasting energy release due to its complex structure? (A) Simple sugars (B) Starches (C) Disaccharides (D) Polysaccharides 43. Which carbohydrate is primarily found in nuts and seeds and can help provide sustained energy? (A) Cellulose (B) Starch (C) Glycogen (D) Fiber 44. Which carbohydrate is utilized by the body to maintain blood sugar levels during periods of fasting? (A) Glucose (B) Cellulose (C) Sucrose (D) Glycogen 45. Which carbohydrate is known for its role in providing structural support in plant cells? (A) Starch (B) Glycogen (C) Cellulose (D) Chitin 46. The term “low glycemic index” refers to carbohydrates that: (A) Have a slower effect on blood glucose levels (B) Are rapidly absorbed and digested (C) Cause rapid spikes in blood glucose (D) Contain high amounts of fiber 47. Which carbohydrate is often used as a source of quick energy during intense physical activity? (A) Cellulose (B) Glucose (C) Starch (D) Fiber 48. Which carbohydrate source is best for long-term energy due to its complex structure and slow digestion? (A) Oats (B) White bread (C) Honey (D) Candy 49. Which of the following is a dietary recommendation for individuals with diabetes concerning carbohydrates? (A) Focus on high-fiber and low glycemic index carbohydrates (B) Increase intake of simple sugars (C) Reduce intake of all carbohydrates (D) Consume carbohydrates only in the evening 50. Which type of carbohydrate is often used in the food industry as a thickening agent or stabilizer in various products? (A) Pectin (B) Cellulose (C) Starch (D) Chitin