MCQs on Nutrition and Digestion in Animals

1. What is the process of taking in food called?

   1. Digestion
   2. Absorption
   3. Ingestion
   4. Assimilation

2. The process of breaking down complex food substances into simpler forms is known as:

   1. Ingestion
   2. Assimilation
   3. Egestion
   4. Digestion

3. After digestion, the simple food substances are absorbed into the blood. This process is called:

   1. Assimilation
   2. Egestion
   3. Absorption
   4. Ingestion

4. The absorbed food substances are utilized for energy, growth, and repair by different parts of the body. This process is called:

   1. Digestion
   2. Absorption
   3. Egestion
   4. Assimilation

5. The process by which undigested food is removed from the body is called:

   1. Assimilation
   2. Egestion
   3. Absorption
   4. Ingestion

6. Which part of the butterfly helps it to obtain its food?

   1. Antenna
   2. Proboscis
   3. Feeding tube
   4. Wings

7. Which of the following animals is classified in Group 1 based on their mode of feeding?

   1. Human Infants
   2. Frogs
   3. Lice
   4. Earthworm

8. Which organism uses its sticky tongue to catch prey?

   1. Human beings
   2. Paramecium
   3. Hydra
   4. Frog

9. Which of the following glands is associated with the production of digestive juice called saliva?

   1. Liver
   2. Salivary glands
   3. Pancreas
   4. Gastric glands

10. The alimentary canal begins at the ______ and ends at the ______:

    1. Mouth, Anus
    2. Esophagus, Stomach
    3. Small intestine, Large intestine
    4. Buccal cavity, Rectum

11. Which of the following organisms uses hair-like structures called cilia to ingest food?

    1. Human beings
    2. Hydra
    3. Frog
    4. Paramecium

12. How does a Hydra capture its prey?

    1. Using its cilia
    2. Using its proboscis
    3. Using its tentacles
    4. Using its mouth

13. In which part of the alimentary canal does most of the digestion and absorption occur?

    1. Stomach
    2. Large intestine
    3. Small intestine
    4. Mouth

14. Which structure in frogs helps them to catch insects?

    1. Tentacles
    2. Cilia
    3. Sticky tongue
    4. Proboscis

15. Which gland produces a digestive juice that breaks down starch into sugars?

    1. Pancreas
    2. Salivary glands
    3. Liver
    4. Gastric glands

16. What experiment can be done to test the action of saliva on starch?

    1. Put boiled potato pieces in test tube A and chewed potato pieces in test tube B, then add iodine solution to both.
    2. Put raw potato pieces in test tube A and chewed potato pieces in test tube B, then add water to both.
    3. Put boiled potato pieces in test tube A and raw potato pieces in test tube B, then add vinegar to both.
    4. Put raw potato pieces in test tube A and chewed potato pieces in test tube B, then add iodine solution to both.

17. Why does the bite of chapatti taste sweet after chewing for some time?

    1. Due to the action of saliva converting starch into sugar.
    2. Due to the tongue detecting sweet taste.
    3. Due to the presence of sweet ingredients in chapatti.
    4. Due to the bacteria in the mouth.

18. Which of the following is NOT a function of the tongue?

    1. Mixing saliva with food.
    2. Pushing chewed food into the food pipe.
    3. Detecting different tastes of food.
    4. Breaking down food into simpler substances.

19. At what age do humans typically lose their milk teeth?

    1. 3-5 years
    2. 6-8 years
    3. 10-12 years
    4. 12-14 years

20. Which type of teeth are used for cutting food?

    1. Incisors
    2. Canines
    3. Premolars
    4. Molars

21. How many premolars are there in each jaw?

    1. Two
    2. Four
    3. Six
    4. Eight

22. Tooth decay can be avoided by:

    1. Eating a lot of sweets
    2. Brushing teeth once a day
    3. Flossing once a week
    4. Brushing teeth at least twice a day

23. What is the movement of food in the esophagus called?

    1. Chewing
    2. Mastication
    3. Peristalsis
    4. Digestion

24. Which gland secretes hydrochloric acid?

    1. Liver
    2. Pancreas
    3. Salivary glands
    4. Gastric glands

25. What is the role of bile juice in digestion?

    1. Digests proteins
    2. Neutralizes stomach acid
    3. Breaks down fats
    4. Converts starch into sugar

26. Which part of the digestive system is the longest?

    1. Esophagus
    2. Stomach
    3. Small intestine
    4. Large intestine

27. What is the function of villi in the small intestine?

    1. To produce digestive juices
    2. To absorb nutrients
    3. To break down food
    4. To store waste

28. Where does the absorption of water and salts primarily occur?

    1. Stomach
    2. Small intestine
    3. Large intestine
    4. Esophagus

29. Which of the following statements is incorrect about the human digestive system?

    1. The alimentary canal stretches from the mouth to the anus.
    2. Hydrochloric acid in the stomach aids in digestion.
    3. The liver produces insulin.
    4. Peristalsis is the wave-like motion that pushes food forward.

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

    1. Produces bile juice
    2. Secretes insulin
    3. Secretes pancreatic juice
    4. Stores bile juice

31. What is the primary function of the large intestine?

    1. Digestion of proteins
    2. Absorption of nutrients
    3. Absorption of water and formation of feces
    4. Digestion of fats

32. What is the function of enamel on teeth?

    1. To grind food
    2. To tear food
    3. To protect teeth
    4. To chew food

33. What is the condition caused by acids formed from plaque that affects tooth enamel?

    1. Mastication
    2. Tooth decay
    3. Peristalsis
    4. Assimilation

34. What does the process of micturition refer to?

    1. Chewing of food
    2. Swallowing of food
    3. Expulsion of urine
    4. Movement of food in the esophagus

35. What is the primary cause of hiccups?

    1. Eating spicy food
    2. Rapid contraction of the diaphragm
    3. Swallowing air
    4. Drinking cold water

36. Which component in the digestive system is responsible for the absorption of glucose and amino acids?

    1. Stomach
    2. Small intestine
    3. Large intestine
    4. Esophagus

37. What is the process called where ruminants chew their cud a second time?

    1. Digestion
    2. Mastication
    3. Ruminating
    4. Assimilation

38. Which of the following is NOT a part of the compound stomach in ruminants?

    1. Rumen
    2. Reticulum
    3. Omasum
    4. Caecum

39. What is the role of bacteria in the rumen of ruminants?

    1. Digesting proteins
    2. Digesting cellulose
    3. Producing bile
    4. Absorbing nutrients

40. Which structure in amoeba helps in capturing and ingestion of food?

    1. Cilia
    2. Flagella
    3. Pseudopodia
    4. Villi

41. In amoeba, the food vacuole is formed by the fusion of:

    1. Pseudopodia
    2. Cilia
    3. Flagella
    4. Villi

42. What happens to the undigested food in amoeba?

    1. It is absorbed
    2. It is stored
    3. It is expelled out of the body
    4. It is converted to energy

43. What is the main function of the structure represented by X in the digestive system diagram?

    1. Produce salivary enzymes
    2. Secrete bile juice
    3. Absorb water from undigested food
    4. Break down food particles

44. Why do humans chew food only when they have it in their mouth, but buffaloes chew continuously?

    1. Buffaloes chew continuously to remove the stuck food particles from their mouth.
    2. Buffaloes chew continuously because cud, the partially digested food, returns into their mouth in small lumps.
    3. Buffaloes chew continuously to collect saliva in their mouth so that more bacteria are formed.
    4. Buffaloes chew continuously because they have to store undigested grass in their mouth.

45. If a patient with cancer of the food pipe is unable to eat and swallow food, what is likely to happen?

    1. Water is not absorbed
    2. The kidney stops working
    3. Complete digestion of carbohydrates does not take place
    4. Proteins are not digested

46. Which organ secretes bile juice?

    1. Liver
    2. Stomach
    3. Lungs
    4. Pancreas

47. Which type of food should be avoided by a person who had their gall bladder removed?

    1. Carbohydrates
    2. Proteins
    3. Fats
    4. Vitamins

48. Which organ of the alimentary canal does digestion of food not occur?

    1. Stomach
    2. Small intestine
    3. Large intestine
    4. Esophagus

49. What is the function of gastric juices secreted in the stomach?

    1. Digestion of carbohydrates
    2. Digestion of proteins
    3. Absorption of water
    4. Absorption of nutrients

50. In which part of the digestive system does no digestion occur?

    1. Esophagus
    2. Stomach
    3. Small intestine
    4. Large intestine

51. What role do villi play in the small intestine?

    1. They secrete digestive enzymes
    2. They help in the absorption of digested food
    3. They produce bile juice
    4. They help in the movement of food

52. Why is the stomach considered a muscular elastic bag?

    1. It stores bile juice
    2. It churns food
    3. It absorbs nutrients
    4. It produces digestive enzymes

53. What happens if digestion completes in the small intestine?

    1. Undigested food passes to the stomach
    2. Nutrients are absorbed into the blood
    3. Food is expelled out of the body
    4. Food is converted into energy

54. Which substance in the stomach is corrosive in nature but does not harm the stomach?

    1. Bile juice
    2. Gastric juice
    3. Pancreatic juice
    4. Hydrochloric acid

55. What is the role of pancreatic juice in digestion?

    1. Digestion of fats and carbohydrates
    2. Digestion of proteins
    3. Neutralizing stomach acid
    4. All of the above

56. What is the function of the gall bladder in digestion?

    1. It produces bile juice
    2. It stores bile juice
    3. It produces digestive enzymes
    4. It absorbs nutrients