WBBSE Class 9 Life Science Chapter 3 Physiological Processes Of Life Nutrition Multiple Choice Questions

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Chapter 3 Physiological Processes Of Life Nutrition Multiple Choice Questions

Question 1. By Nutrition—

  1. Potential energy is converted into kinetic energy
  2. Kinetic energy is stored in the cells
  3. Heat is generated in the body
  4. The dry weight of the body increases

Answer: 4. The dry weight of the body increases

Question 2. The function of food is—

  1. Generation of energy
  2. Maintaining body growth
  3. Prevention of diseases
  4. All of these

Answer: 4. All of these

Question 3. Select the correct statement.

  1. Nutrition always depends upon digestion
  2. Digestion is a type of nutrition
  3. Nutrition is none other than digestion
  4. Digestion is a step in the nutrition

Answer: 4. Digestion is a step in the nutrition

Read and Learn More WBBSE Class 9 Life Science MCQs

Question 4. Select the correct statement.

  1. All foods need digestion before assimilation
  2. Assimilation of food is unnecessary for green plants as they synthesise ready food
  3. Assimilation is the most essential part of any nutrition
  4. All are correct

Answer: 4. All are correct

Question 5. Assimilation is a step of nutrition, by which—

  1. Complex food is converted into a simple absorbable form
  2. Essential nutrients get integrated into the protoplasm
  3. Nutrients are taken in by body fluid from the digestive tract
  4. Blood supplies nutrients to the tissue

Answer: 2. Essential nutrients get integrated into the protoplasm

Question 6. Green plants perform nutrition by—

  1. Photosynthesis and absorption
  2. Photosynthesis and digestion
  3. Photosynthesis and assimilation
  4. Photosynthesis and egestion

Answer: 3. Photosynthesis and assimilation

Question 7. Parasitic nutrition is seen amongst—

  1. Some fungi
  2. Cascuta
  3. Louse
  4. All of these

Answer: 4. All of these

Question 8. The similarity between Rafflesid and Puccinia is that both are—

  1. Parasitic organisms
  2. Saprophytic plants
  3. Autotrophic plants
  4. Partial autotrophs

Answer: 1. Parasitic organisms

Question 9. Lichen is a

  1. Saprophytic fungus
  2. Symbiotic association of algae and fungi
  3. Parasitic fungus
  4. None of these

Answer: 2. Symbiotic association of algae and fungi

Question 10. Insectivorous plants depend on insects for—

  1. Phosphorus
  2. Iron
  3. Nitrogen
  4. Calcium

Answer: 3. Nitrogen

Question 11. Mycorrhiza is a symbiotic association between plant roots and—

  1. Bacteria
  2. Algae
  3. Fungus
  4. None of there

Answer: 3. Fungus

Question 12. Parasitic organisms always show—

  1. Close association
  2. Nutritional interdependence
  3. They benefit of themselves
  4. The benefit of both members

Answer: 3. They benefit of themselves

Question 13. Escherichia coli helps in the synthesis of vitamin B12 in our intestines. This is a case of—

  1. Autotrophism
  2. Heterotrophic
  3. Symbiosis
  4. Competition

Answer: 3. Symbiosis

Question 14 Coprophagy is a typical nutritional technique, seen among—

  1. Few cattle
  2. Few rodents
  3. Most herbivores
  4. Few carnivores

Answer: 2. Few rodents

Question 15. Sanguinivores include—

  1. Mosquitoes.
  2. Mosquitoes and vampire bats
  3. Leeches and bedbugs,
  4. All of these

Answer: 4. Leeches and bedbugs,

Question 16. The aerial roots found in the orchids, which help in the absorption of water vapour, are called—

  1. Haustoria
  2. Velamen
  3. Villus
  4. None of these

Answer: 2. Velamen

Question 17. Carrion feeding is shown by—

  1. Cattle
  2. Crow
  3. Pigeon
  4. Cat

Answer: 2. Crow

Question 18. Mammals are heterodont because they—

  1. Possess similar types of teeth
  2. Have different types of teeth
  3. Show teething twice in life
  4. Have socketed teeth

Answer: 2. Have different types of teeth

Question 19. The dental formula of an adult man is—

  1. \(\mathrm{I} \frac{2}{2}, \mathrm{C} \frac{1}{1}, \mathrm{PM} \frac{2}{2}, \mathrm{M} \frac{3}{3}\)
  2. \(\mathrm{I} \frac{2}{2}, \mathrm{C} \frac{1}{1}, \mathrm{PM} \frac{3}{3}, \mathrm{M} \frac{2}{2}\)
  3. \(\mathrm{I} \frac{1}{1}, \mathrm{C} \frac{2}{2}, \mathrm{PM} \frac{2}{2}, \mathrm{M} \frac{3}{3}\)
  4. \(\mathrm{I} \frac{2}{2}, \mathrm{C} \frac{1}{1}, \mathrm{PM} \frac{2}{2}, \mathrm{M} \frac{2}{2}\)

Answer: 1. \(\mathrm{I} \frac{2}{2}, \mathrm{C} \frac{1}{1}, \mathrm{PM} \frac{2}{2}, \mathrm{M} \frac{3}{3}\)

Question 20. A five-year-old child has—

  1. 24 teeth
  2. 28 teeth
  3. 16 teeth
  4. 20 teeth

Answer: 4. 20 teeth

Question 21. The slightly swollen, muscular chamber behind the buccal cavity is known as—

  1. Pharynx
  2. Oesophagus
  3. Salivary glands
  4. Gum

Answer: 1. Pharynx

Question 22. Oesophagus enters into the stomach through—

  1. Cardiac end
  2. Fundus
  3. Pyloric end
  4. None of these

Answer: 1. Cardiac end

Question 23. HCI in the stomach helps in—

  1. Killing germs
  2. Activation of proenzymes
  3. Decrease of pH
  4. All of these

Answer: 4. All of these

Question 24. The ‘IT shaped portion of the small intestine is called—

  1. Jejunum
  2. Duodenum
  3. Ilium
  4. Ileum

Answer: 2. Duodenum

Question 25. The longest portion of the human intestine is—

  1. Duodenum
  2. Jejunum
  3. Ileum
  4. Colon

Answer: 4. Colon

Question 26. The liver has a role in—

  1. Respiration
  2. Gastric juice secretion
  3. HCI secretion
  4. Bile secretion

Answer: 4. Bile secretion

Question 27. The processes by which absorption occur in the small intestine are—

  1. Diffusion
  2. Osmosis
  3. Active transport
  4. All of these

Answer: 1. Diffusion

Question 28. Villi increase—

  1. The inner surface area of the oesophagus
  2. The inner surface area of the small intestine
  3. The inner surface area of the stomach
  4. The inner surface area of the colon

Answer: 2. The inner surface area of the small intestine

Question 29. Succus entericus is secreted from—

  1. Salivary gland
  2. Stomach
  3. Pancreas
  4. Small intestine

Answer: 4. Small intestine

Question 30. The main site of water absorption in the human Gl tract is—

  1. Stomach
  2. Ileum
  3. Jejunum
  4. Colon

Answer: 4. Colon

Question 31. Chyme is the semi-fluid acidic mass of partia-digested food found in the—

  1. Buccal cavity
  2. Stomach
  3. Duodenum
  4. Jejunum

Answer: 2. Stomach

Question 32. Bile helps in the digestion of—

  1. Protein
  2. Fat
  3. Carbohydrates
  4. All of these

Answer: 2. Fat

Question 33. Chyle is a partly digested liquid present in the

  1. Stomach
  2. Jejunum
  3. Large intestine
  4. Rectum

Answer: 2. Jejunum

Question 34. Ptyaline and trypsin act respectively on—

  1. Starch and peptone
  2. Peptone and starch
  3. Sucrose and protein
  4. Peptide and peptone

Answer: 1. Starch and peptone

Question 35. The similarity between saliva and gastric juice is—

  1. Both kill bacteria
  2. Both help in fat digestion
  3. Both help in carbohydrate digestion
  4. Both help in protein digestion

Answer: 1. Both kill bacteria

Question 36. Hydrolytic enzymes help in

  1. Digestion
  2. Absorption
  3. Assimilation
  4. Diffusion of food

Answer: 1. Digestion

Question 37. Generally, enzymes and hormones are formed from—

  1. Carbohydrate
  2. Protein
  3. Fats
  4. Vitamins

Answer: 2. Protein

Question 38. Which of the following is not an essential fatty acid?

  1. Linoleic acid
  2. Ascorbic acid
  3. Linolenic acid
  4. Arachidonic acid

Answer: 2. Ascorbic acid

Question 39. The enzyme present in the salivary glands which helps to kill bacteria, is—

  1. Amylase
  2. Ptyaline
  3. Maltese
  4. Lysozyme

Answer: 1. Amylase

Question 40. The bacteria, present in the large intestine, which helps to synthesise vitamin K and folic acid, is—

  1. Escherichia coli
  2. Clostridium sp.
  3. Rhizobium sp.
  4. Nostoc sp.

Answer: 1. Escherichia coli

Question 41. The protein-digesting enzyme which is not present in the human body, is—

  1. Pepsin
  2. Rennin
  3. Erepsin
  4. Trypsin

Answer: 2. Rennin

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