TRB BT Assistant - Nutrition, Digestion and Metabolism Online Test (MCQ Quiz)

1. Which of the following is a macronutrient essential for energy, growth, and repair of tissues?

A) Vitamins B) Minerals C) Proteins D) Water

2. What is the primary role of carbohydrates in the diet?

A) Building and repairing tissues B) Providing a source of energy C) Regulating bodily functions D) Absorption of fat-soluble vitamins

3. Which type of nutrient provides the most concentrated source of energy per gram?

A) Carbohydrates B) Proteins C) Fats D) Vitamins

4. What are essential fatty acids, and why are they important?

A) Fats the body can synthesize, important for insulation B) Fats the body cannot synthesize, crucial for cell membranes and hormone production C) Fats that provide immediate energy, stored as glycogen D) Fats that help absorb water-soluble vitamins

5. Which vitamin is crucial for calcium absorption and bone health?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

6. What is the main function of dietary fiber?

A) Provide energy B) Aid in digestion and prevent constipation C) Build muscle mass D) Synthesize hormones

7. Which mineral is vital for oxygen transport in the blood?

A) Calcium B) Potassium C) Sodium D) Iron

8. What is the process by which food is broken down into simpler substances that can be absorbed by the body?

A) Metabolism B) Assimilation C) Digestion D) Respiration

9. Where does the digestion of carbohydrates primarily begin?

A) Stomach B) Small intestine C) Mouth D) Large intestine

10. What enzyme, found in saliva, begins the breakdown of starch?

A) Pepsin B) Lipase C) Amylase D) Trypsin

11. The stomach secretes hydrochloric acid (HCl) and which enzyme to digest proteins?

A) Amylase B) Lipase C) Pepsinogen D) Trypsinogen

12. What is the primary site for the absorption of digested nutrients?

A) Stomach B) Esophagus C) Small intestine D) Large intestine

13. Which organ produces bile, which aids in fat digestion?

A) Pancreas B) Gallbladder C) Liver D) Spleen

14. Bile is stored and concentrated in which organ before being released into the small intestine?

A) Liver B) Pancreas C) Stomach D) Gallbladder

15. What is the role of the pancreas in digestion?

A) Produce bile B) Secrete digestive enzymes and bicarbonate ions C) Absorb water and electrolytes D) Store bile

16. The hormone secretin, released by the small intestine, stimulates the pancreas to release:

A) Enzymes B) Bile C) Bicarbonate ions D) Hydrochloric acid

17. What is the main function of the large intestine?

A) Digestion of proteins B) Absorption of water and electrolytes, formation of feces C) Absorption of most nutrients D) Production of digestive enzymes

18. What is metabolism?

A) The process of breaking down food B) The sum of all chemical processes that occur in an organism C) The absorption of nutrients into the bloodstream D) The elimination of waste products

19. Which metabolic pathway breaks down glucose to produce ATP?

A) Glycogenesis B) Gluconeogenesis C) Glycolysis D) Lipolysis

20. What is the primary energy currency of the cell?

A) Glucose B) Fatty acids C) ATP (Adenosine Triphosphate) D) Amino acids

21. Anabolic processes are involved in:

A) Breaking down complex molecules B) Building up complex molecules from simpler ones C) Releasing energy D) Excreting waste

22. Catabolic processes are involved in:

A) Synthesizing new molecules B) Storing energy C) Breaking down complex molecules into simpler ones and releasing energy D) Regulating body temperature

23. What is the Basal Metabolic Rate (BMR)?

A) The total energy expenditure during vigorous exercise B) The energy expenditure during sleep C) The minimum energy required to maintain vital bodily functions at rest D) The energy used for digestion of food

24. Which hormone plays a key role in regulating blood glucose levels by promoting glucose uptake by cells?

A) Glucagon B) Thyroxine C) Insulin D) Adrenaline

25. What is the role of glucagon in metabolism?

A) To lower blood glucose levels B) To increase blood glucose levels by stimulating glycogen breakdown C) To promote fat storage D) To stimulate protein synthesis

26. Which gland produces thyroid hormones that regulate metabolic rate?

A) Adrenal gland B) Pituitary gland C) Thyroid gland D) Pancreas

27. Excess amino acids in the body are primarily converted into:

A) Glucose B) Fat C) Urea D) Glycogen

28. What is the process of converting glucose into glycogen for storage?

A) Glycogenolysis B) Gluconeogenesis C) Glycogenesis D) Lipogenesis

29. What is the process of breaking down glycogen into glucose?

A) Glycogenesis B) Glycogenolysis C) Gluconeogenesis D) Lipolysis

30. Which of the following is a fat-soluble vitamin?

A) Vitamin B12 B) Vitamin C C) Folate D) Vitamin E

31. What is the primary function of Vitamin C in the body?

A) Blood clotting B) Vision C) Collagen synthesis and antioxidant activity D) Nerve function

32. Deficiency of Vitamin A can lead to:

A) Scurvy B) Rickets C) Night blindness D) Pernicious anemia

33. Which mineral is essential for maintaining fluid balance and nerve impulse transmission?

A) Iron B) Zinc C) Potassium D) Sodium

34. What is the role of enzymes in digestion?

A) To absorb nutrients B) To speed up the breakdown of food molecules C) To transport nutrients D) To store energy

35. The muscular contractions that move food through the digestive tract are called:

A) Peristalsis B) Segmentation C) Churning D) Diffusion

36. What substance is primarily absorbed in the stomach?

A) Proteins B) Fats C) Water and alcohol D) Carbohydrates

37. Which enzyme, secreted by the stomach, begins protein digestion?

A) Trypsin B) Chymotrypsin C) Pepsin D) Carboxypeptidase

38. In the small intestine, pancreatic amylase continues the digestion of:

A) Proteins B) Fats C) Carbohydrates D) Nucleic acids

39. Pancreatic lipase breaks down fats into:

A) Amino acids B) Monosaccharides C) Fatty acids and glycerol D) Nucleotides

40. What is the function of villi and microvilli in the small intestine?

A) To produce digestive enzymes B) To increase the surface area for nutrient absorption C) To secrete mucus for lubrication D) To neutralize stomach acid

41. Undigested material and water are processed in the large intestine to form:

A) Chyme B) Bile C) Feces D) Villi

42. The process of converting non-carbohydrate sources (like amino acids and glycerol) into glucose is called:

A) Glycolysis B) Glycogenesis C) Glycogenolysis D) Gluconeogenesis

43. Which organ is responsible for detoxifying harmful substances and metabolizing drugs?

A) Kidney B) Lungs C) Liver D) Heart

44. What is the primary role of adipose tissue in metabolism?

A) Producing digestive enzymes B) Storing energy in the form of fat C) Transporting oxygen D) Regulating blood pressure

45. Ketone bodies are produced during prolonged fasting or starvation when the body relies heavily on:

A) Carbohydrate metabolism B) Protein metabolism C) Fat metabolism D) Water metabolism

46. Which vitamin is essential for blood clotting?

A) Vitamin A B) Vitamin D C) Vitamin E D) Vitamin K

47. A deficiency in Iodine can lead to:

A) Anemia B) Goiter C) Osteoporosis D) Night blindness

48. What is the final product of aerobic respiration in terms of energy?

A) Lactic acid B) Pyruvate C) ATP and heat D) Carbon dioxide and water

49. The process of breaking down fats into fatty acids and glycerol is known as:

A) Lipogenesis B) Lipolysis C) Glycolysis D) Proteolysis

50. Which of the following is a water-soluble vitamin?

A) Vitamin A B) Vitamin D C) Vitamin K D) Vitamin B6

Nutrition, Digestion and Metabolism - Online Test

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