Life Processes Class 10 MCQ
Life Processes class 10 MCQ Online Test Pdf :
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Life processes MCQ Questions and Answers are provided here with detailed explanation of each question. These life processes MCQs are important from the NEET as well as various type of exam like NTSE, By practicing our MCQ on life processes class 10 pdf students will get acquainted with the key concepts which must be prepared to score high marks in the objective type questions in the any exam.
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1. Which of the following statements about autotrophs is incorrect?
A) They synthesized carbohydrates by using carbon dioxide, water in presence of sunlight and chlorophyll
B) They store carbohydrates in form of starch
C) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
D) They form the first trophic level in the food chain
Answer: A
2. Write correct sequence of anaerobic respiration____________
A) Glucose → pyruvate → lactic acid
B) Glucose → Pyruvate → Ethanol + Carbon-Dioxide
C) Glucose → pyruvate → ADP→ lactic acid
D) Glucose -→ pyruvate → carbon dioxide + ethanol + energy
Answer: B
3. The pancreas pour their secretion into______________
A) Small intestine
B) Large intestine
C) Stomach
D) Duodenum
Answer: D
4. The kidneys in human beings are part of______________
A) Nutrition
B) Respiration
C) Excretion
D) Circulation
Answer: C
5. Which of the following components of food is digested by amylase?
A) proteins
B) fats
C) Minerals
D) carbohydrates
Answer: D
6. The autotrophs require___________
A) CO2 and water
B) chlorophyll
C) sunlight
D) All
Answer: D
7. The correct path of urine is______
A) Kidney→ ureter → urthra→ urinary bladder
B) Kidney → urinary bladder → urethra → ureter
C) kidney→ ureter → urinary bladder→ urethra
D) urinary bladder → kidney → ureter →urethra
Answer: C
8. ATP stand for_______________
A) adenosine diphosphate
B) adenosine phosphate
C) adenosine triphosphate
D) none
Answer: C
9. The enzymes pepsin and trypsin are secreted by_____________
A) Stomach and pancreas
B) Salivary gland and stomach
C) Liver and pancreas
D) Liver and salivary gland
Answer: A
10. The enzymes contained in pancreatic juices help in the digestion of__________
A) Fats and carbohydrates
B) Proteins and fats
C) Proteins and carbohydrates
D) Proteins, fats and carbohydrates
Answer: D
11. The vein which brings clean blood from the lungs into the heart is known as____________
A) Pulmonary vein
B) Hepatic vein
C) Superior vena cava
D) Pulmonary artery
Answer: A
12. Which among the following procedures is used for cleaning the blood of a person by separating the waste substance from it?
A) Kidney transplant
B) Blood transfusion
C) Dialysis
D) Hydrolysis
Answer: C
13. Which among the following is necessary to carry out the blood coagulation in a cut or wound?
A) White Blood Cells
B) Blood plasma
C) Platelets
D) Red blood cells
Answer: C
14. In amoeba, food is digested in the________
A) food vacuole
B) mitochondria
C) pseudopodia
D) chloroplast
Answer: A
15. The contraction and expansion movement of the walls of the food pipe is called________
A) translocation
B) transpiration
C) peristaltic movement
D) digestion
Answer: C
16. The respiratory pigment in human beings is____________
A) carotene
B) chlorophyll
C) haemoglobin
D) mitochondria
Answer: C
17. How do these fungi obtain nutrition?
A) by eating the bread on which it is growing
B) by using nutrients from the bread to prepare their own food
C) by breaking down the nutrients of bread and then absorbing them
D) by allowing other organisms to grow on the bread and then consuming them
Answer: C
18. The opening and closing of the stomatal pore depends upon__________
A) Oxygen
B) temperature
C) water in the guard cells
D) concentration of CO2
Answer: C
19. A plant gets rid of excess water through transpiration. Which is a method used by plants to get rid of solid waste products?
A) shortening of stem
B) dropping down of fruits
C) shedding of yellow leaves
D) expansion of roots into the soil
Answer: C
20. Digestion of food starts from which organ of the human digestive system?
A) mouth due to the presence of saliva
B) oesophagus that moves the food in gut
C) that releases juices for fat breakdown
D) which helps in mixing food with digestive juices
Answer: A
21. What is the percentage of the oxygen in the expired air when a person is resting?
A) 12%
B) 16%
C) 20%
D) 24%
Answer: B
22. How is food transported from phloem to the tissues according to plants’ needs?
A) food is transported along with the water in the plant’s body.
B) food is transported in only direction like water in the plant body through xylem.
C) food is transported from a region with low concentration to higher concentration.
D) food is transported from a region where it is produced to other parts of the plants.
Answer: D
23. Main site of photosynthesis____________
A) Leaf
B) Stem
C) Chloroplast
D) Guard cells
Answer: C
24. Which element is used in the synthesis of proteins?
A) Hydrogen
B) Oxygen
C) Nitrogen
D) Carbon dioxide
Answer: C
25. Lipase acts on_____________
A) Amino acids
B) Fats
C) Carbohydrates
D) All of these
Answer: B
26. One cell-thick vessels are called____________
A) Arteries
B) Veins
C) Capillaries
D) Pulmonary artery
Answer: C
27. Bile juice is secreted by____________
A) Stomach
B) Pancreas
C) Small intestine
D) Liver
Answer: D
28. Which region of the alimentary canal absorbs the digested food?
A) Stomach
B) Small intestine
C) Large intestine
D) Liver
Answer: B
29. When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains________
A) fats
B) complex proteins
C) starch
D) simple proteins
Answer: C
30. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in_______________
A) cytoplasm
B) mitochondria
C) chloroplast
D) nucleus
Answer: B
31. Name the pores in a leaf through which respi-ratory exchange of gases takes place___________
A) Lenticels
B) Vacuoles
C) Xylem
D) Stomata
Answer: d
32. The respiratory pigment in human beings is__________
A) carotene
B) chlorophyll
C) haemoglobin
D) mitochondria
Answer: C
33. Name a circulatory fluid in the human body other than blood___________
A) Platelets
B) RBC
C) Lymph
D) Plasma
Answer: C
34. Name the tube which connects the kidneys to the urinary bladder_______________
A) Urethra
B) Nephron
C) Tubule
D) Ureter
Answer: D
35. Which is the correct sequence of body parts in the human alimentary canal?
A) Mouth → stomach → small intestine → large intestine → oesophagus
B) Mouth → oesophagus → stomach → small intestine → large intestine
C) Mouth → stomach → oesophagus → smallintestine → large intestine
D) Mouth → oesophagus → stomach → large intestine → small intestine
Answer: B
36. ATP can be used in the cells for the______________
A) Contraction of muscles
B) Protein synthesis
C) Conduction of nervous impulses
D) All of the above
Answer: D
37. Plasma transports___________ in dissolved form.
A) Food
B) carbon dioxide
C) Nitrogenous wastes
D) All of the above
Answer: D
38. The normal systolic pressure is about____mm of Hg and diastolic pressure is____ mm of Hg.
A) 100,60
B) 120,80
C) 140,100
D) 160,120
Answer: B
39. Following is true for tissue fluid or lymph________
A) It is similar to the plasma of blood
B) It is colorless
C) It contains less protein
D) All of the above
Answer: D
40. The enzymes present in secrete intestinal juice finally convert the______________
A) Proteins to amino acids
B) Complex carbohydrates into glucose
C) Fats into fatty acids and glycerol
D) All of the above
Answer: D
41. Gastric glands release ____a protein digesting enzyme called pepsin and mucus.
A) Sulphuric acid
B) Hydrochloric acid
C) Nitric acid
D) None of the above
Answer: D
42. Chlorophyll is contained in_________
A) leaf
B) stem
C) roots
D) both (A) and (B)
Answer: D
43. The process of acquiring Oxygen from outside the body and to use it in the process of breakdown of food sources for cellular needs is called_____________
A) Respiration
B) Digestion
C) Transportation
D) Excretion
Answer: A
44. The waste products removed from the body and discarded by a process is called_____________
A) Respiration
B) Digestion
C) Transportation
D) Excretion
Answer: D
45. Example of some organism break-down the food material outside the body and then absorb it________________
A) Fungi
B) Yeast
C) Mushrooms
D) All of the above
Answer: D
46. The end product of fat digestion is________
A) Fatty acid
B) Glycerol
C) Aminoacids
D) Both A and B
Answer: D
47.Alternate contraction and relaxation of the alimentary canal is called_______
A) Peristalsis
B) Ingestion
C) Deglutition
D) None of these
Answer: A
48. Roots of the plants absorb water from the soil through the process of__________
A) diffusion
B) transpiration
C) osmosis
D) None of these
Answer: C
49.Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
A) Starch breaking down into sugars.
B) Proteins breaking down into amino acids.
C) Absorption of vitamins.
D) Fats breaking down into fatty acids and glycerol.
Answer: A
50. Conversion of large fat droplets into smaller droplets are______________
A) Anabolism
B) Neutralisation
C) Assimilation
D) Emulsification
Answer: D
51. Job of maintenance function of living being is performed by_________
A) Movements
B) Growth
C) Life processes
D) Reproduction.
Answer: C
52. In simple organisms, exchange of gases and excretion occur through.
A) Osmosis
B) Diffusion
C) Imbibition
D) All the above.
Answer: B
53. The carbohydrate reserve of plants is__________
A) Starch
B) Glycogen
C) Fat
D) Cellulose.
Answer: A
54. ATP synthesis occurs in response to_________
A) Electron gradient
B) Turgor pressure gradient
C) Proton gradient
D) Negative pressure.
Answer: C
55.Number of molars that can be present in an adult human is_____________
A) 3
B) 6
C) 8
D) 12
Answer: D
56. Nutrition of Amoeba is___________
A) Holozoic
B) Holophytic
C) Saprophytic
D) Parasitic.
Answer: A
57. Proteolytic enzyme of pancreatic juice is_____________
A) Pepsin
B) Trypsin
C) Amylase
D) Lipase
Answer: B
58. Krebs cycle operates in_________
A) Endoplasmic reticulum
B) Chloroplasts
C) Golgi bodies
D) Mitochondria.
Answer: D
59. Muscular partition present between thorax and abdomen is__________
A) Pericardium
B) Pleura
C) Epiglottis
D) Diaphragm
Answer: D
60. Chemical released by blood platelets is________
A) Prothrombin
B) Heparin
C) Fibrinogen
D) Thromboplastin.
Answer: D
61. Life span of an RBC is___________
A) 40 days
B) 80 days
C) 120 days
D) 160 days.
Answer: C
62. Clotting of blood does not occur inside blood vessels due to presence of_________
A) Oxalic acid
B) Heparin
C) Prothrombin
D) Hirudin.
Answer: B
63. Contractile vacuole of Amoeba takes part in______________
A) Locomotion
B) Digestion of the food
C) Ingestion of food
D) Osmoregulation.
Answer: D
64. Anaerobic breakdown of glucose in our muscles produces____________
A) Pyruvate
B) Lactic acid
C) Ethyl alcohol
D) Oxalic acid.
Answer: B
65. ATP and NADP 2H are produced in_____________
A) Mitochondria
B) Chloroplast
C) Peroxisomes
D) Lysosomes
Answer: A
66. Number of salivary glands found in man are__________
A) one pair
B) two pairs
C) three pairs
D) five pairs
Answer: C
67. Rate of photosynthesis is high in___________
A) orange light
B) green light
C) red light
D) yellow light
Answer: C
68. Light reaction takes place in_______
A) grana
B) stroma
C) mitochondria
D) leucoplast.
Answer: A
69. Excess glucose is stored in our body in the form of___________
A) glycogen
B) fat
C) protein
D) cholesterol
Answer: A
70. Which is the correct sequence of the air passage in man_________
A) Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Alveoli
B) Nasal cavity → Larynx → Pharynx → Trachea → Bronchi → Alveoli
C) Nasal cavity → Pharynx → Trachea → Larynx → Bronchi → Alveoli
D) Nasal cavity → Trachea → Larynx → Bronchi → Alveoli
Answer: A
71. Number of alveoli in lungs is_________
A) 30 thousand
B) 30 lac
C) 3 crore
D) 30 crore
Answer: D
72. Which blood corpuscles destroy bacteria?
A) W.B.C
B) R.B.C
C) blood platelets
D) all these
Answer: A
73. Glycolysis takes place in___________
A) cytoplasm
B) chloroplast
C) mitochondria
D) ribosome.
Answer: A
74. During aerobic respiration one molecule of glucose produces___________
A) 32 ATP
B) 19 ATP
C) 38 ATP
D) 30 ATP
Answer: C
75. Amoeba ingests food with the help of__________
A) cilia
B) mouth
C) flagella
D) pseudopodia
Answer: D
76. Food is translocated by phloem in the form of_____________
A) sucrose
B) protein
C) hormone
D) fats
Answer: A
77. Malpighian body consists of___________
A) uriniferous tubule
B) Bowman’s caspsule and glomerulus
C) Bowman’s capsule and neck
D) two limbs of loop of Henle.
Answer: B
78. Muscle contraction of alimentary canal is called____________
A) digestion
B) peristalsis
C) circulation
D) absorption
Answer: B
79. The xylem in plants are responsible for______
A) transport of water
B) transport of food
C) transport of amino acids
D) transport of oxygen.
Answer: A
80. The energy currency is____________
A) DNA
B) RNA
C) ATP
D) Chlorophyll
Answer: C
81. It is necessary to separate oxygenated blood from the deoxygenated blood in mammals____________
A) To maintain the body temperature
B) To provide more oxygen to cells
C) Both (a) and (b)
D) None of the above
Answer: C
82. Who proposed the term “Homeostasis”
A) Claude Bernard
B) Walter Cannon
C) Marcello Malpighi
D) Henle
Answer: B
83. The chlorophyll in photosynthesis is used for_____________
A) Absorbing light
B) Breaking down water molecule
C) No function
D) Reduction of CO2
Answer: A
84. Which of the following sequences is truly a systemic circulation pathway?
A) Left auricle → Left ventricle → Pulmonary aorta → Tissues → Right auricle
B) Left auricle → Left ventricle → Aorta →Arteries →Tissues → Veins → Right atrium
C) Right ventricle → Pulmonary aorta →Tissues → Pulmonary veins → Left auricle
D) Right auricle → Left ventricle → Aorta →Tissues → Veins → Right auricle
Answer: B
85. Which one is uricotelic?
A) Frog and toads
B) Lizards and birds
C) Cattle, monkey and man
D) Molluscs
Answer: C
86. Autotrophs and heterotrophs differ in___________
A) How they obtain their carbon.
B) Whether they are prokaryotic or eukaryotic.
C) How they reproduce, sexually or asexually.
D) Whether they use chemicals or light as a source of energy.
Answer: A
87. Correct order of excretory organs in cockroach, earthworm and rabbit respectively__________
A) Skin, malpighi tubules, kidney
B) Malpighi tubules, nephridia, kidney
C) Nephridia, malpighi tubules, kidney
D) Nephridia, kidney, green gland
Answer: B
88. Which part of the plant helps to absorb water and minerals from the soil?
A) Root hairs
B) Roots
C) Root cap
D) Tap root
Answer: A
89. Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
A) Mucus
B) Pepsin
C) Trypsin
D) Bile
Answer: A
90. The enzymes pepsin and trypsin are secreted by____________
A) Stomach and pancreas
B) Salivary gland and stomach
C) Liver and pancreas
D) Liver and salivary gland
Answer: A
91. During contraction, what prevents the backflow of blood inside the heart?
A) Valves in heart
B) Thick muscular walls of ventricles
C) Thin walls of atries
D) All of the above
Answer: A
92. Entities exhibiting the properties of both non-living and living are called _____
A) Lichens
B) Bacteria
C) Diatoms
C) Viruses
Answer: D
93. The chlorophyll is used in photosynthesis for_____________
A) No function.
B) Breaking down the water molecule.
C) Reduction of carbon dioxide.
D) Absorbing light.
Answer: D
94. The enzymes that are found in the secreted intestinal juice finally convert______________
A) Proteins to amino acids.
B) Fats into fatty acids and glycerol.
C) Complex carbohydrates into glucose.
D) All the above
Answer: D
95. Reduction of blood pH will____________
A) Reduces blood supply to the brain.
B) Reduces the heartbeat rate.
C) Decrease the haemoglobin affinity with oxygen.
D) Releases bicarbonate ions by the liver.
Answer: C
96. Pick the correct one from the following.
A) Plasma = Blood – Lymphocytes
B) Lymph = Plasma + RBC + WBC
C) Serum = Blood + Fibrinogen
D) Blood = Plasma + RBC + WBC
Answer: D
97. Choose The Function Of The Pancreatic Juice From The Following_____________
A) trypsin digests proteins and lipase carbohydrates.
B) trypsin digests emulsified fats and lipase proteins.
C) trypsin and lipase digest fats.
D) trypsin digests proteins and lipase emulsified fats.
Answer: D
98.Which Of The Following Is An Incorrect Statement?
A) Organisms grow with time
B) Organisms must repair and maintain their structure
C) Movement of molecules does not take place among cells
D) Energy is essential for life processes
Answer: C
99. The Filtration Units Of Kidneys Are Called_____________
A) Urethra
B) Ureter
C) Neurons
D) Nephrons
Answer: D
100. Oxygen Liberated During Photosynthesis Comes From_________
A) Water
B) Chlorophyll
C) Carbon dioxide
D) Glucose
Answer: A
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