Life Processes Class 10 MCQ Set 4 | Nutrition in Animals & Digestive System | NCERT JKBOSE CBSE

 

Topic Coverage: Heterotrophic nutrition, nutrition in Amoeba and Paramecium, human digestive system (alimentary canal, villi, dental caries), and digestion processes.

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📌 Quiz: Biology 10th

📚 Subject: Biology

🏫 Class: Class 10

📖 Chapter: Life Process Set D

📝 Questions: 50

📘 Biology 10th

Biology | Life Process Set D

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Q1. What is heterotrophic nutrition?

A. Making food from carbon dioxide and water using sunlight

B. Obtaining ready-made organic food from other organisms

C. Breaking down dead organic matter outside the body

D. Absorbing nutrients directly through the body surface

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Q2. How does Amoeba obtain its nutrition?

A. By absorbing nutrients through its entire body surface

B. By using pseudopodia to engulf food particles through phagocytosis

C. By using cilia to sweep food into its oral groove

D. By piercing and sucking juices from other organisms

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Q3. Which structure in Amoeba is responsible for digesting the engulfed food?

A. Nucleus

B. Contractile vacuole

C. Food vacuole

D. Pseudopodium

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Q4. How does Paramecium obtain its nutrition?

A. By using pseudopodia like Amoeba

B. By absorbing food through its cell wall

C. By using cilia to sweep food into the oral groove leading to a gullet

D. By producing enzymes outside the body to digest food

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Q5. In both Amoeba and Paramecium, what happens to the undigested food?

A. It is absorbed into the cytoplasm

B. It is used to produce energy

C. It is expelled out of the body by the process of egestion

D. It is stored in the contractile vacuole

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Q6. Which of the following is the correct sequence of steps in holozoic nutrition as seen in Amoeba?

A. Digestion → Ingestion → Absorption → Assimilation → Egestion

B. Ingestion → Digestion → Absorption → Assimilation → Egestion

C. Ingestion → Absorption → Digestion → Assimilation → Egestion

D. Absorption → Ingestion → Digestion → Egestion → Assimilation

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Q7. What is the human alimentary canal?

A. A gland that secretes digestive juices

B. A muscular tube extending from the mouth to the anus, involved in digestion and absorption

C. The organ responsible for pumping blood

D. The network of nerves controlling digestion

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Q8. Which part of the human alimentary canal is responsible for maximum absorption of digested food?

A. Stomach

B. Small intestine

C. Large intestine

D. Esophagus

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Q9. What is the function of the villi in the small intestine?

A. To secrete digestive enzymes

B. To increase surface area for absorption of nutrients

C. To kill harmful bacteria

D. To push food forward by peristalsis

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Q10. What is dental caries?

A. Inflammation of the gums

B. Permanent damage to the enamel of the tooth, leading to cavities

C. Yellowing of teeth due to aging

D. Growth of an extra set of teeth

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Q11. Which of the following is the main cause of dental caries?

A. Eating too many proteins

B. Lack of saliva production

C. Bacteria in the mouth converting sugars into acids that demineralize enamel

D. Drinking too much water

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Q12. How can dental caries be prevented?

A. By eating more sweets and chocolates

B. By brushing teeth regularly with fluoride toothpaste and avoiding frequent sugar intake

C. By not using dental floss

D. By drinking acidic drinks frequently

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Q13. Which enzyme is present in saliva and helps in the digestion of starch?

A. Pepsin

B. Trypsin

C. Amylase

D. Lipase

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Q14. What is the function of hydrochloric acid secreted in the stomach?

A. To digest proteins directly

B. To kill bacteria and provide an acidic medium for pepsin to work

C. To emulsify fats

D. To absorb nutrients

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Q15. Which organ secretes bile juice?

A. Stomach

B. Pancreas

C. Liver

D. Gallbladder

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Q16. What is the function of bile juice in digestion?

A. To digest proteins

B. To emulsify fats and provide an alkaline medium for intestinal enzymes

C. To digest carbohydrates

D. To absorb water from food

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Q17. Which organ stores bile juice?

A. Liver

B. Pancreas

C. Gallbladder

D. Small intestine

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Q18. What is the role of pancreatic juice in digestion?

A. It only digests carbohydrates

B. It contains enzymes that digest carbohydrates, proteins, and fats

C. It only digests proteins

D. It neutralizes stomach acid only

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Q19. Which enzyme in pancreatic juice digests proteins?

A. Amylase

B. Lipase

C. Trypsin

D. Maltase

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Q20. Which enzyme in pancreatic juice digests fats?

A. Amylase

B. Trypsin

C. Lipase

D. Pepsin

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Q21. Where does the complete digestion of carbohydrates, proteins, and fats take place in the human body?

A. Stomach

B. Small intestine

C. Large intestine

D. Mouth

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Q22. What are the end products of carbohydrate digestion?

A. Amino acids

B. Fatty acids and glycerol

C. Glucose and other simple sugars

D. Nucleotides

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Q23. What are the end products of protein digestion?

A. Glucose

B. Amino acids

C. Fatty acids

D. Nucleotides

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Q24. What are the end products of fat digestion?

A. Glucose

B. Amino acids

C. Fatty acids and glycerol

D. Nucleotides

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Q25. How are the end products of digestion absorbed in the small intestine?

A. By simple diffusion only

B. Through the villi by diffusion and active transport into blood capillaries and lacteals

C. Through the stomach wall directly

D. Through the large intestine

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Q26. What happens to glucose after absorption in the small intestine?

A. It is stored directly in the stomach

B. It is transported to the liver where it is converted to glycogen for storage

C. It is excreted immediately

D. It is converted into proteins

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Q27. What happens to amino acids after absorption in the small intestine?

A. They are stored as glycogen

B. They are used to build proteins in the body

C. They are converted into fats

D. They are excreted as waste

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Q28. What is the role of the large intestine in digestion?

A. To digest proteins and fats

B. To absorb water and minerals from undigested food

C. To secrete digestive enzymes

D. To absorb glucose from food

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Q29. What is peristalsis?

A. The process of breaking down food chemically

B. The rhythmic contraction and relaxation of muscles in the alimentary canal that pushes food forward

C. The absorption of nutrients in the intestine

D. The secretion of digestive juices

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Q30. Which of the following correctly represents the process of nutrition in animals?

A. Ingestion → Assimilation → Digestion → Absorption → Egestion

B. Ingestion → Digestion → Absorption → Assimilation → Egestion

C. Digestion → Ingestion → Absorption → Assimilation → Egestion

D. Absorption → Ingestion → Digestion → Assimilation → Egestion

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Q31. What is the function of the epiglottis during swallowing?

A. To digest food

B. To close the windpipe so that food does not enter the trachea

C. To push food into the stomach

D. To secrete digestive juices

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Q32. Which part of the tooth is hardest and protects the tooth from decay?

A. Pulp

B. Dentine

C. Enamel

D. Cementum

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Q33. What is the function of the pancreas in the digestive system?

A. To store bile

B. To secrete pancreatic juice containing digestive enzymes into the small intestine

C. To absorb nutrients

D. To produce hydrochloric acid

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Q34. What is the pH of the stomach acid that helps in digestion?

A. Neutral (pH 7)

B. Strongly acidic (pH around 1.5-2.5)

C. Weakly acidic (pH 5-6)

D. Alkaline (pH 8-9)

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Q35. Why is it necessary to digest food before absorption?

A. To make food taste better

B. To convert complex, insoluble food molecules into simpler, soluble molecules that can be absorbed

C. To kill bacteria in food

D. To remove water from food

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Q36. What is the function of mucus secreted in the stomach?

A. To digest proteins

B. To protect the stomach wall from the action of hydrochloric acid and digestive enzymes

C. To emulsify fats

D. To absorb nutrients

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Q37. Which sphincter controls the passage of food from the stomach to the small intestine?

A. Cardiac sphincter

B. Pyloric sphincter

C. Anal sphincter

D. Esophageal sphincter

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Q38. Where does the digestion of starch begin in the human body?

A. Stomach

B. Small intestine

C. Mouth

D. Large intestine

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Q39. Where does the digestion of proteins begin in the human body?

A. Mouth

B. Stomach

C. Small intestine

D. Large intestine

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Q40. Where does the digestion of fats begin in the human body?

A. Mouth

B. Stomach

C. Small intestine

D. Large intestine

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Q41. What is the function of the lacteals in the villi?

A. To absorb glucose

B. To absorb amino acids

C. To absorb fatty acids and glycerol

D. To absorb water

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Q42. Which vitamin is produced by bacteria in the large intestine?

A. Vitamin A

B. Vitamin C

C. Vitamin K

D. Vitamin D

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Q43. What is assimilation in nutrition?

A. The process of taking food into the body

B. The process of breaking down food into simpler substances

C. The utilization of absorbed nutrients by the body for energy, growth, and repair

D. The removal of undigested food from the body

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Q44. Which of the following is an example of a digestive enzyme?

A. Hemoglobin

B. Pepsin

C. Insulin

D. Thyroxine

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Q45. What is the role of the liver in the digestive process?

A. To store food temporarily

B. To produce bile which helps in fat digestion

C. To absorb nutrients

D. To produce digestive enzymes for proteins

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Q46. What happens if the bile duct is blocked?

A. Digestion of carbohydrates will stop

B. Digestion and absorption of fats will be affected

C. Digestion of proteins will stop

D. No effect on digestion

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Q47. Which of the following is NOT a digestive enzyme?

A. Amylase

B. Lipase

C. Trypsin

D. Hemoglobin

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Q48. What is the function of the sphincter muscles in the alimentary canal?

A. To secrete digestive juices

B. To regulate the passage of food from one part to another

C. To absorb nutrients

D. To mix food with digestive juices

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Q49. What is the role of the appendix in humans?

A. It is a vestigial organ with no known essential function

B. It helps in digestion of cellulose

C. It produces bile

D. It stores glycogen

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Q50. Why do some animals like ruminants have a specialized digestive system?

A. To digest cellulose present in grass and plant material with the help of microorganisms

B. To digest meat more efficiently

C. To store water

D. To absorb more oxygen

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