This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Life Processes > Class 10 Science Chapter 6 Life Processes – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 6 Life Processes Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When do plants do most of their respiration? A) Daytime. B) Nighttime. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nighttime. 2. What is photosynthesis? A) When a photographer takes a photo. B) The process in which humans eat their food. C) To get your pictures from the photo lab. D) The process in which plants make their food. Show Answer Correct Answer: D) The process in which plants make their food. 3. What is the final product of photosynthesis? A) Protein. B) Mineral salt. C) Fat. D) Starch. Show Answer Correct Answer: D) Starch. 4. Chlorophyll has a porphyrin ring with ..... at the centre. A) Carbon (C). B) Magnesium (Mg). C) Iron (Fe). D) Chromium (Cr). Show Answer Correct Answer: B) Magnesium (Mg). 5. How many circuits are there in human circulatory system? A) 1. B) 3. C) 4. D) 2. Show Answer Correct Answer: D) 2. 6. The difference between living and dishonesty A) Office. B) The acts of life. C) Color. D) Physical structure. Show Answer Correct Answer: B) The acts of life. 7. The correct path in urine formation is A) Kidney-ureter-urethra-bladder. B) Kidney-ureter-bladder-urethra. C) Bladder-kidney-ureter-urethra. D) Kidney-bladder-urethra-ureter. Show Answer Correct Answer: B) Kidney-ureter-bladder-urethra. 8. The kidneys in human beings are part of ..... A) Excretion. B) Circulation. C) Respiration. D) Nutrition. Show Answer Correct Answer: A) Excretion. 9. What is the main function of the small intestine in the human digestive system? A) Storage of waste. B) Production of bile. C) Absorption of nutrients. D) Filtration of blood. Show Answer Correct Answer: C) Absorption of nutrients. 10. Assertion:Raw materials needed for photosynthesis are carbon dioxide, water and minerals.Reason:Nutrients provide energy to an organism. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: B) Both A and R are true but R is not the correct explanation of A. 11. Roots of the plants absorb water from the soil through the process of: A) Diffusion. B) Transpiration. C) Osmosis. D) None of these. Show Answer Correct Answer: C) Osmosis. 12. How many pairs of salivary glands are found inhumans? A) Six. B) Two. C) Three. D) Four. Show Answer Correct Answer: C) Three. 13. Which is the correct sequence for the mechanism of digestion? A) Digestion, Ingestion, Absorption, Assimilation and Egestion. B) Ingestion, Digestion, Absorption, Assimilation and Egestion. C) Digestion, Assimilation, Egestion, Absorption and Assimilation. D) Absorption, Assimilation, Digestion, Ingestion and Egestion. Show Answer Correct Answer: B) Ingestion, Digestion, Absorption, Assimilation and Egestion. 14. The exit of unabsorbed food material is regulated by A) Liver. B) Anus. C) Small intestine. D) Anal sphincter. Show Answer Correct Answer: D) Anal sphincter. 15. Which of the following structures is involved in gaseous exchange in woody stem of a plant? A) Stomata. B) (a) Lenticel. C) (c) Guard cell. D) None of the above. Show Answer Correct Answer: C) (c) Guard cell. 16. The mode of nutrition in Cuscuta A) Holozoic. B) Saprophytic. C) Autotrohpic. D) Parasitic. Show Answer Correct Answer: D) Parasitic. 17. In anaerobic respiration the amount of ATP produced overall is A) 38 ATP. B) 40 ATP. C) 36 ATP. D) 2 ATP. Show Answer Correct Answer: A) 38 ATP. 18. All producers show A) Heterotrophic nutrition. B) Autotrophic nutrition. C) Holozoic nutrition. D) Both A and B. Show Answer Correct Answer: B) Autotrophic nutrition. 19. Muscular structure that helps to expand and contract the lungs, forcing air in and out A) Alveoli. B) Nasal cavity. C) Pharynx. D) Diaphragm. Show Answer Correct Answer: D) Diaphragm. 20. The process of transpiration in plants helps in: A) Opening of stomata. B) Absorption of CO2 from atmosphere. C) Upward conduction of water and minerals. D) Absorption of O2 from atmosphere. Show Answer Correct Answer: C) Upward conduction of water and minerals. 21. Where is the dirty blood in our body filtered? A) Heart. B) Ureter. C) Lungs. D) Kidneys. Show Answer Correct Answer: D) Kidneys. 22. Assertion:Lungs become empty after the forceful expiration.Reason:The forcefully exhaled air is called the residual volume of air. A) Both A and R are true and R is the correct explanation of the A. B) Both A and R are true but R is not the correct explanation of the A. C) A is true but R is false. D) Both A and R are false. Show Answer Correct Answer: D) Both A and R are false. 23. What are the products obtained by anaerobic respiration in muscle cells? A) Carbon dioxide + Water + Energy. B) Pyruvate. C) Lactic acid + Energy. D) Ethanol + Carbon dioxide + Energy. Show Answer Correct Answer: C) Lactic acid + Energy. 24. When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence A) Water vapour. B) Oxygen. C) Carbon dioxide. D) Nitrogen. Show Answer Correct Answer: C) Carbon dioxide. 25. Teeth are covered with a thin coating of A) Enamel. B) Cementum. C) Dentine. D) Crown. Show Answer Correct Answer: A) Enamel. 26. Air that deliver from bronchioles are exchanged here. It is tiny air sacs and looks like grape. A) Trachea. B) Lung. C) Nostril. D) Alveolus. Show Answer Correct Answer: D) Alveolus. 27. The heart chamber having the thickest muscular wall is A) Left ventricle. B) Left atrium. C) Right atrium. D) Right ventricle. Show Answer Correct Answer: A) Left ventricle. 28. Humans have how many chambers in heart A) 4. B) 2. C) 3. D) 1. Show Answer Correct Answer: A) 4. 29. Diabetic people need to- A) Reduce water intake. B) Eliminate any physical activity. C) Increase sweet intake. D) Increase water intake. Show Answer Correct Answer: A) Reduce water intake. 30. Respiratory pigment in human body is A) BLOOD. B) HAEMOGLOBIN. C) WATER. D) CHLOROPHYLL. Show Answer Correct Answer: B) HAEMOGLOBIN. 31. Name the tube which connects the kidneys to the urinary bladder. A) Tubule. B) Urethra. C) Nephron. D) Ureter. Show Answer Correct Answer: D) Ureter. 32. THE FILTERATION UNIT OF KIDNEYS ARE CALLED ..... A) URETHRA. B) NEPHRON. C) URETER. D) NEURON. Show Answer Correct Answer: B) NEPHRON. 33. Which among of the following substances are reabsorbed in the nephron? A) Glucose, Amino acids, Salts. B) Glucose, Urea, Creatinine. C) Urea, Uric acid, Amino acid. D) KCl, Urea, Glucose. Show Answer Correct Answer: A) Glucose, Amino acids, Salts. 34. In which part of the heart does the aorta originate? A) Right ventricle. B) Left ventricle. C) Left atrium. D) Right atrium. Show Answer Correct Answer: B) Left ventricle. 35. Hydrochloric acid is secreted by A) Pancreas. B) Small intestine. C) Liver. D) Gastric glands of the stomach. Show Answer Correct Answer: D) Gastric glands of the stomach. 36. Clusters of tiny air sacs that allow the exchange of oxygen and carbon dioxide A) Lungs. B) Alveoli. C) Diaphragm. D) Pharynx. Show Answer Correct Answer: B) Alveoli. 37. The main nitrogen-containing waste excreted in urine by humans is A) AMMONIA. B) UREA. C) NUCLEOTIDE. D) URIC ACID. Show Answer Correct Answer: B) UREA. 38. Name the fluid part of blood A) Platelets. B) Plasma. C) Water. D) RBC. Show Answer Correct Answer: B) Plasma. 39. Raw materials required in the autotrophic mode of nutrition involves:i. Carbon dioxide and waterii. Chlorophylliii. Nitrogeniv. Sunlight A) (i), (ii) and (iii). B) (i) and (ii). C) (i), (ii) and (iv). D) All (i), (ii), (iii) and (iv). Show Answer Correct Answer: C) (i), (ii) and (iv). 40. The excretory unit in the human excretory system: A) Nephron. B) Neuron. C) Kidney. D) Nephridia. Show Answer Correct Answer: A) Nephron. 41. Name the layer that protects the stomach cells from acid A) Pepsin. B) Villi. C) Gastric lining. D) Mucus. Show Answer Correct Answer: D) Mucus. 42. Which Of The Following Statement Is Or Are Incorrect? A) All the living organisms need energy to perform various life processes. B) Energy is not required by an organism during sleep. C) Food is a kind of will which provides energy to all living organisms. D) Our body gets longest size in in early morning in the bed. Show Answer Correct Answer: B) Energy is not required by an organism during sleep. 43. Villi present on the internal wall of intestine help inthe A) Breakdown of proteins. B) Emulsification of fats. C) Absorption of digested food. D) Digestion of carbohydrates. Show Answer Correct Answer: C) Absorption of digested food. 44. Normal systolic pressure in humans is- A) 40mmHg. B) 80mmHg. C) 120mmHg. D) 150mmHg. Show Answer Correct Answer: C) 120mmHg. 45. The contraction and expansion movement of the walls of the food pipe is called: A) Peristaltic movement. B) Translocation. C) Digestion. D) Transpiration. Show Answer Correct Answer: A) Peristaltic movement. 46. The process of conversion of glucose into pyruvic acidoccurs in A) Mitochondria. B) Chloroplast. C) Outside the cell. D) Cytoplasm. Show Answer Correct Answer: D) Cytoplasm. 47. In the process of respiration ..... A) ADP is converted into ATP. B) Glucose is converted into carbondioxide. C) Glucose is converted into carbondioxide and water which releases energy. D) Pyruvic acid is converted into ATP. Show Answer Correct Answer: C) Glucose is converted into carbondioxide and water which releases energy. 48. Carbohydrates in the plants are stored in the form of A) Glucose. B) Maltose. C) Glycogen. D) Starch. Show Answer Correct Answer: D) Starch. 49. It is the site of gaseous exchange in human lungs. A) Alveoli. B) Trachea. C) Villi. D) Larynx. Show Answer Correct Answer: A) Alveoli. 50. Which region of the alimentary canal absorbs the digested food? A) Stomach. B) Small intestine. C) Large intestine. D) Liver. Show Answer Correct Answer: B) Small intestine. 51. The enzymes pepsin and trypsin are secreted respectively by: A) Stomach and pancreas. B) Salivary gland and stomach. C) Liver and pancreas. D) Liver and salivary gland. Show Answer Correct Answer: A) Stomach and pancreas. 52. Raw material participating in the compilation A) Co2, and H2O. B) C6H12O6 and O2. C) Co2 and O2. D) C6H12O6 and H2O. Show Answer Correct Answer: A) Co2, and H2O. 53. Waste products are eliminated during perspiration. A) Metabolism. B) Excretion. C) Circulation. D) Homeostasis. Show Answer Correct Answer: B) Excretion. 54. Passage of inhaled air in human beings A) Nose-mouth-lungs. B) Nostril-pharynx-larynx-trachea-bronchi-bronchioles-alveoli. C) Nose-larynx-pharynx-bronchus-alveoli-bronchioles. D) Trachea-lungs-larynx-pharynx-alveoli. Show Answer Correct Answer: B) Nostril-pharynx-larynx-trachea-bronchi-bronchioles-alveoli. 55. Raw materials used in the autotrophic mode of nutrition is: A) Hydrogen, Oxygen. B) Carbon dioxide, water. C) Glucose, Starch, Fructose. D) Protein, Fats. Show Answer Correct Answer: B) Carbon dioxide, water. 56. Assertion:in the daytime, CO2 generated during respiration is used up forphotosynthesis.Reason:There is no CO2 release during day. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: A) Both A and R are true and R is the correct explanation of A. 57. Guard cells are usually ..... A) Kidney shaped. B) Spherical. C) Rectangular in shape. D) Pear-shaped. Show Answer Correct Answer: A) Kidney shaped. 58. Bile is produced by ..... , stored in ..... , released by ..... A) Liver; duodenum; bile duct. B) Liver; gall bladder; bile duct. C) Gall bladder; liver; bile duct. D) Gall bladder; duodenum; bile duct. Show Answer Correct Answer: B) Liver; gall bladder; bile duct. 59. Passage of urine occur through: A) Kidney $\rightarrow$ ureter $\rightarrow$ urethra $\rightarrow$ urinary bladder. B) Kidney $\rightarrow$ ureter $\rightarrow$ urinary bladder $\rightarrow$ urethra. C) Kidney $\rightarrow$ urinary bladder $\rightarrow$ urethra $\rightarrow$ ureter. D) Urinary bladder $\rightarrow$ ureter $\rightarrow$ kidney $\rightarrow$ urethra. Show Answer Correct Answer: B) Kidney $\rightarrow$ ureter $\rightarrow$ urinary bladder $\rightarrow$ urethra. 60. The metal ion present in haemoglobin is: A) Fe. B) Ca. C) Na. D) Mg. Show Answer Correct Answer: A) Fe. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 6 Life Processes Quiz 1Class 10 Science Chapter 6 Life Processes Quiz 2Class 10 Science Chapter 6 Life Processes Quiz 4Class 10 Science Chapter 6 Life Processes Quiz 5Class 10 Science Chapter 6 Life Processes Quiz 6 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books