5. Life Processes

*नोट: यह सेक्शन रिवीजन के लिए है। अपना ज्ञान परखने के लिए ऊपर दिए गए क्विज़ में भाग लें।

1. All the processes which together perform the maintenance job are called:
   A) Respiration  |  B) Life Processes  |  C) Nutrition  |  D) Excretion
2. By which process do plants prepare their own food?
   A) Respiration  |  B) Photosynthesis  |  C) Excretion  |  D) Transportation
3. Which gas is essential for Photosynthesis?
   A) Oxygen  |  B) Nitrogen  |  C) Carbon dioxide  |  D) Helium
4. Where is Chlorophyll mainly found?
   A) Roots  |  B) Stem  |  C) Chloroplasts  |  D) Flower
5. With the help of what does Amoeba capture its food?
   A) Mouth  |  B) Pseudopodia  |  C) Tentacles  |  D) Legs
6. Which enzyme is found in human saliva?
   A) Pepsin  |  B) Salivary Amylase  |  C) Trypsin  |  D) Lipase
7. Which is the longest part of the alimentary canal?
   A) Oesophagus  |  B) Stomach  |  C) Small Intestine  |  D) Large Intestine
8. Through which organ does a fish breathe?
   A) Skin  |  B) Gills  |  C) Lungs  |  D) Nose
9. How many chambers are there in the human heart?
   A) Two  |  B) Three  |  C) Four  |  D) One
10. What gives blood its red color?
    A) Plasma  |  B) Haemoglobin  |  C) WBC  |  D) Platelets
11. The transportation of water in plants is done by:
    A) Phloem  |  B) Xylem  |  C) Stomata  |  D) Leaf
12. The transportation of food in plants is done by:
    A) Xylem  |  B) Phloem  |  C) Root  |  D) Tulsi
13. What is the main unit of the human excretory system?
    A) Liver  |  B) Nephron  |  C) Heart  |  D) Artery
14. What is necessary for autotrophic nutrition?
    A) CO2 and water  |  B) Chlorophyll  |  C) Sunlight  |  D) All of the above
15. Where does the breakdown of pyruvate to give CO2, water, and energy take place?
    A) Cytoplasm  |  B) Mitochondria  |  C) Chloroplast  |  D) Nucleus
16. The instrument used to measure blood pressure is called:
    A) Barometer  |  B) Sphygmomanometer  |  C) Thermometer  |  D) Lactometer
17. Where is Bile juice secreted from?
    A) Stomach  |  B) Liver  |  C) Pancreas  |  D) Small intestine
18. Who controls the opening and closing of stomatal pores?
    A) Guard cells  |  B) Xylem  |  C) Phloem  |  D) Nucleus
19. What type of nutrition is found in Fungi?
    A) Autotrophic  |  B) Saprophytic  |  C) Parasitic  |  D) Holozoic
20. In humans, the kidney is a part of the system for:
    A) Nutrition  |  B) Respiration  |  C) Excretion  |  D) Transportation
21. The normal systolic blood pressure of a healthy human is:
    A) 80 mm Hg  |  B) 120 mm Hg  |  C) 100 mm Hg  |  D) 150 mm Hg
22. In which part of the cell does Glycolysis occur?
    A) Mitochondria  |  B) Cytoplasm  |  C) Nucleus  |  D) Vacuole
23. Which structure provides the surface for the exchange of gases in human lungs?
    A) Bronchi  |  B) Alveoli  |  C) Larynx  |  D) Nose
24. What is the main function of Platelets?
    A) Carrying oxygen  |  B) Clotting of blood  |  C) Fighting diseases  |  D) Delivering food
25. The yellow color of urine is due to which pigment?
    A) Haemoglobin  |  B) Urochrome  |  C) Chlorophyll  |  D) Bile
26. What medium is necessary for the action of pepsin in the stomach?
    A) Alkaline  |  B) Acidic  |  C) Neutral  |  D) None of these
27. Name the enzyme secreted by the pancreas that digests proteins?
    A) Amylase  |  B) Trypsin  |  C) Lipase  |  D) Pepsin
28. Where does the complete oxidation of pyruvate occur during aerobic respiration?
    A) Cytoplasm  |  B) Mitochondria  |  C) Lungs  |  D) Heart
29. What happens when lactic acid builds up in our muscles during sudden activity?
    A) Energy increases  |  B) Cramps or pain  |  C) Sleepiness  |  D) Hunger
30. The walls of arteries compared to veins are:
    A) Thin  |  B) Thick and elastic  |  C) Same  |  D) None of these
31. Which vein carries oxygenated blood?
    A) Vena cava  |  B) Pulmonary Vein  |  C) Renal vein  |  D) Hepatic vein
32. In which part of the nephron does filtration of blood occur?
    A) Bowman's capsule  |  B) Collecting duct  |  C) Loop of Henle  |  D) Ureter
33. Transpiration in plants helps in:
    A) Temperature regulation  |  B) Upward movement of water and minerals  |  C) Both A and B  |  D) Only for energy
34. What is the main function of 'Villi' in the human digestive system?
    A) Chewing food  |  B) Increasing surface area for absorption  |  C) Making acid  |  D) Making enzymes
35. What is the full form of ATP?
    A) Adenosine Triphosphate  |  B) Amino Triphosphate  |  C) Adenosine Tartrate  |  D) None of these
36. What is produced by yeast during anaerobic respiration?
    A) Lactic acid  |  B) Ethanol and CO2  |  C) Only water  |  D) Only energy
37. How many times does blood pass through the heart of a fish in one cycle?
    A) Twice  |  B) Once  |  C) Four times  |  D) Three times
38. The process in which oxidation of food occurs in the presence of oxygen is:
    A) Anaerobic respiration  |  B) Aerobic Respiration  |  C) Fermentation  |  D) Digestion
39. What is Lymph?
    A) Red fluid  |  B) A colorless tissue fluid that helps in transportation  |  C) A muscle  |  D) A bone
40. What is the main gaseous exchange in plants during the day?
    A) Release of O2 and intake of CO2  |  B) Release of CO2  |  C) Only nitrogen  |  D) None of these
41. Who protects the inner lining of the stomach from HCl?
    A) Pepsin  |  B) Mucus  |  C) Bile  |  D) Saliva
42. Who performs the emulsification of fats in the small intestine?
    A) HCl  |  B) Bile salts  |  C) Lipase  |  D) Trypsin
43. The extremely thin tubes connecting arteries and veins are called:
    A) Aorta  |  B) Capillaries  |  C) Vein  |  D) Heart
44. Adenosine triphosphate (ATP) is called the ________ of the cell:
    A) Energy currency  |  B) Brain  |  C) Food  |  D) Wall
45. Which is the largest gland in the human body?
    A) Pancreas  |  B) Liver  |  C) Thyroid  |  D) Pituitary
46. In which part of the alimentary canal does complete digestion of food take place?
    A) Stomach  |  B) Small Intestine  |  C) Large Intestine  |  D) Mouth
47. What kind of blood flows in the pulmonary artery?
    A) Oxygenated  |  B) Deoxygenated  |  C) Pure  |  D) None of these
48. Cleaning blood artificially when kidneys fail is called:
    A) Transplant  |  B) Dialysis  |  C) Operation  |  D) Irrigation
49. Where are waste products stored in plants?
    A) Cellular vacuoles  |  B) Old xylem (Resin/Gum)  |  C) Falling leaves  |  D) All of the above
50. Where does digestion of food occur in Amoeba?
    A) Food vacuole  |  B) Nucleus  |  C) Outside  |  D) Pseudopodia
51. What is the first event that occurs during photosynthesis?
    A) Reduction of CO2  |  B) Absorption of light energy by chlorophyll  |  C) Splitting of water  |  D) Sugar formation
52. What is the function of the enzyme 'Lipase' present in pancreatic juice?
    A) Protein digestion  |  B) Digestion of emulsified fats  |  C) Carbohydrate digestion  |  D) Making acid
53. Which chamber of the heart has the thickest wall?
    A) Right atrium  |  B) Left Ventricle  |  C) Left atrium  |  D) Right ventricle
54. What is the importance of 'Double Circulation' in humans?
    A) It keeps the blood cool  |  B) Ensures high efficiency by separating oxygenated and deoxygenated blood  |  C) Clotting of blood  |  D) None of these
55. Where does 'Selective reabsorption' take place in the nephron?
    A) Bowman's capsule  |  B) Renal Tubule  |  C) Ureter  |  D) Artery
56. In photosynthesis, solar energy is converted into which energy?
    A) Thermal energy  |  B) Chemical Energy  |  C) Electrical energy  |  D) Mechanical energy
57. Why is the breathing rate faster in aquatic organisms compared to terrestrial ones?
    A) Water is cold  |  B) The amount of dissolved oxygen in water is low  |  C) Fish is small  |  D) None of these
58. The substance found in blood plasma that protects the body is:
    A) Haemoglobin  |  B) Antibodies  |  C) Fibrinogen  |  D) Glucose
59. What surrounds the alveoli?
    A) Nerves  |  B) Blood capillaries  |  C) Bones  |  D) Air
60. What is the function of valves in the heart?
    A) To increase blood pressure  |  B) To prevent backflow of blood  |  C) To clean blood  |  D) None of these
61. In which direction does the transport of food occur in phloem?
    A) Only upwards  |  B) Only downwards  |  C) Both upwards and downwards  |  D) None of these
62. Where is urine stored before being passed out?
    A) Kidney  |  B) Urinary bladder  |  C) Liver  |  D) Artery
63. In what form is nitrogen taken up by plants?
    A) As a gas  |  B) As nitrates or nitrites  |  C) Ammonia  |  D) Both B and C
64. The pancreas is a 'mixed gland' because it secretes:
    A) Only enzymes  |  B) Only hormones  |  C) Both enzymes and hormones (like insulin)  |  D) None of these
65. How many total ATP are obtained from the complete oxidation of one molecule of glucose?
    A) 2  |  B) 38 ATP  |  C) 10  |  D) 100
66. Which of these is responsible for converting 'prothrombin' to 'thrombin' for blood clotting?
    A) Calcium  |  B) Thromboplastin  |  C) Vitamin K  |  D) All of the above together
67. Are red blood cells (RBCs) present in lymph?
    A) Yes  |  B) No  |  C) Very few  |  D) Only in children
68. What is the 'Pacemaker' of the heart called?
    A) S.A. Node  |  B) A.V. Node  |  C) Artery  |  D) Vein
69. In which color of light is the rate of photosynthesis highest?
    A) Green  |  B) Red  |  C) Blue  |  D) Yellow
70. For how long does food remain in the stomach?
    A) 10 minutes  |  B) 3 to 4 hours  |  C) 24 hours  |  D) 1 week
71. What is the value of the Respiratory Quotient (R.Q.) for carbohydrates?
    A) 0.7  |  B) 1.0  |  C) 0  |  D) Infinity
72. What is NOT present in the glomerular filtrate?
    A) Glucose  |  B) Blood cells and large proteins  |  C) Amino acids  |  D) Water
73. The membrane that surrounds the heart is called:
    A) Pleura  |  B) Pericardium  |  C) Mucus  |  D) Cuticle
74. What is the respiratory organ in insects?
    A) Skin  |  B) Trachea  |  C) Gills  |  D) Lungs
75. Which process is responsible for excretion in plants?
    A) Photosynthesis  |  B) Diffusion  |  C) Digestion  |  D) None of these