Class 10 Science Chapter 6 Life Processes MCQ Questions with Answer

Life Processes Class 10 MCQ is one of the best strategies to prepare for the CBSE Class 10 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more Life Processes class 10, which will help them all through their board test.

Life Processes Class 10 MCQ Questions with Answers

Class 10 Science MCQ with answers are given here to chapter 6 Life Processes. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 10 Science syllabus. By Solving these Class 10 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 10 Annual exam.

Learn Life Processes Class 10 MCQ with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 10 Life Processes MCQ with answers given below.

Life Processes Class 10 MCQ Questions

Question 1. Rings of cartilage present in the throat ensure that
(a)the air passage collapses
(b)the air passage does not collapse
(c) the air is filtered entering the nostrils
(d)None of these

Question 2. The function of the lymph fluid is to
(a) Drains excess fluid from extracellular space back into the blood
(b) Carries digested and absorbed fat from intestine
(c) Circulates around the body and help in clotting of blood
(d)Both (a) and (b)

Question 3. Select the incorrect pair
(a)Respiration-Oxidation of food to obtain energy
(b)Nutrition-Obtaining and utilizing nutrient
(c)Transportation-Responses to stimuli
(d)Excretion-Removal of waste byproducts

Question 4. Which one of the following juices secreted in the human body does not contain any enzyme?
(a)Salivary juice
(b) Bile juice
(c)Gastric juice
(d) Pancreatic juice

Question 5. In artificial kidney, which substance passes from the blood to the dialysis fluid?
(a) Urea
(b) Heart
(c) Uric acid
(d) Creatinine

Question 6. Where are proteins first digested in the alimentary canal?
(a)Small intestine
(b) Oesophagus
(c) Mouth
(d) Stomach

Question 7. Which of the following statements is incorrect about artery?
(a)It carries oxygenated blood from heart to different body parts.
(b)It is also called collecting vessel
(c)It is thick, elastic and muscular
(d)It has no valves.

Question 8. ————–the key organ of, cardiovascular system which acts as a muscular pump.
(a)Kidney
(b) Heart
(c) Lungs
(d) Stomach

Question 9. Saliva contains an enzyme called:
(a)Trypsin
(b) Ptyalin
(c) Amylase
(d) Pepsin

Question 10. Structural and functional unit of kidney is:
(a)Nephron
(b)Ureter
(c)Neuron
(d)Urethra

Question 11. The organism having parasitic mode of nutrition is:
(a) Penicillium
(b) Plasmodium
(c) Paramecium
(d) Parrot

Question 12. Loop of Henle’s is found in:
(a)Lungs
(b) Liver
(c) Nephron
(d) Neuron

Question 13. The doctor measured Ravi’s blood pressure and said it is normal now. The range of Ravi’s blood pressure (systolic/diastolic) is likely to be-
(a)120/80mm of Hg
(b)160/80mm of Hg
(c)120/60mm of Hg
(d)180/80mm of Hg

Question 14. In amoeba, food is digested in the:         
(a) food vacuole
(b) mitochondria
(c) pseudopodia
(d) chloroplast

Question 15. The breakdown of pyruvate to give carbon dioxide,water and energy takes place in
(a)cytoplasm
(b)mitochondria
(c)chloroplast
(d)nucleus

Question 16. Blood from superior vena cava flows into————
(a)Right atrium
(b) Right ventricle
(c) Left atrium
(d) Left ventricle

Question 17. What are the products obtained by anaerobic respiration in plants?     
(a) Lactic acid + Energy
(b) Carbon dioxide + Water + Energy
(c) Ethanol + Carbon dioxide + Energy
(d) Pyruvate

Question 18. 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.

Question 19. 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 → small intestine → large intestine
(d) Mouth → oesophagus → stomach → large intestine → small intestine

Question 20. The image shows the excretory system in humans.
What is the importance of the labelled part in the excretory system?       
(a) It produces urine.
(b) It filters waste from the blood.
(c) It stores the urine till urination.
(d) It carries urine from the kidney to the outside.

Question 21. The image shows the transport of gases in the body through the heart and lungs.     
Which option correctly shows the transport of oxygen to the cell?
(a) Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells
(b) Lungs →pulmonary vein →right atrium →right ventricle → aorta → body cells
(c) Lungs →pulmonary artery →left atrium → left ventricle → vena cava → body cells
(d) Lungs →pulmonary artery →right atrium → right ventricle→ vena cava → body cells

Question 22. 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

Question 23. The respiratory pigment in human beings is:         
(a) carotene
(b) chlorophyll
(c) haemoglobin
(d) mitochondria

Question 24. The image shows the bread moulds on a bread 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

Question 25. The characteristic processes observed in anaerobic respiration are         
i) presence of oxygen
ii) release of carbon dioxide
iii) release of energy
iv) release of lactic acid
(a) i), ii) only
(b) i), ii), iii) only
(c) ii), iii), iv) only
(d) iv) only

Question 26. What is the percentage of the oxygen in the expired air when a person is resting:   
(a) 12%
(b) 16%
(c) 20%
(d) 24%

Question 27. Which of the following is the important characteristic of Emphysema:               
(a) Destruction of the alveolar wall and air sacs in the lungs are damaged.
(b) Increase in the growth of the lung tissue.
(c) Inflammation in the wall of bronchi.
(d) Thickening of the artery walls of the lungs.

Question 28. 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

Question 29. In which of the following groups of organisms, food materials are broken down outside the body and absorbed?             
(a) Mushroom, green plants, Amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, lice, tapeworm

Question 30. 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

Question 31. Chemicals present in the tobacco smoke lead to the breakdown of the elastic tissue in the alveoli. Name this specific condition.   
(a) Heart disease
(b) Emphysema
(c) Bronchitis
(d) Lung cancer

Question 32. The image shows how Amoeba obtains nutrition.       
How is this process advantageous for Amoeba?
(a) capturing of food takes less time
(b) complex food can be digested easily
(c) more amount of food can be consumed
(d) fast distribution of nutrition within the body

Question 33. During respiration, the exchange of gases take place in:     
(a) Trachea and larynx
(b) Alveoli of lungs
(c) Alveoli and throat
(d) Throat and larynx

Question 34. The contraction and expansion movement of the walls of the food pipe is called:             
(a) translocation
(b) transpiration
(c) peristaltic movement
(d) digestion

Question 35. The opening and closing of the stomatal pore depends upon     
(a) Oxygen
(b) temperature
(c) water in the guard cells
(d) concentration of CO₂
Correct Answer: Option 

Question 36. Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by:   
(a) Labeo, Chameleon, Salamander
(b) Hippocampus, Exocoetus, Anabas
(c) Hyla, Rana, Draco
(d) Whale, Dolphin, Turtle

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Question 37. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by: 
(a) Labeo, Chameleon, Salamander
(b) Hippocampus, Exocoetus, Anabas
(c) Hyla, Rana, Draco
(d) whale, dolphin, turtle

Question 38. Which of the following statement(s) is/are true about heart?                 
(i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs
(ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs
(iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts
(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body
(a) (i)
(b) (ii)
(c) (ii) and (iv)
(d) (i) and (iii)

Question 39. The xylem in plants are responsible for:             
(a) Transport of water
(b) Transport of food
(c) Transport of amino acids
(d) Transport of oxygen

Question 40. 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

Question 41. In which of the following vertebrate group groups, does heart not pump oxygenated blood to different parts of the body?   
(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only

Question 42. Which of the following statements about the autotrophs is incorrect:             
(a) They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
(b) They store carbohydrates in the form of starch
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
(d) They constitute the first trophic level in food chains

Question 43. Nuclei can be seen clearly seen in a well prepared slide of epidermal peel of a leaf in the
(a) Guard cells only
(b) Epidermal cells only
(c) Guard cells as well as epidermal cells
(d) Stomata, guard cells and epidermal cells

Question 44. While preparing good temporary mount of leaf peel to observe stomata, care should be taken to avoid
(a) Adding glycerine to the slide
(b) Staining the peel with safranin
(c) Having air bubbles in the slide
(d) Using water to wash the slide

Question 45. Oxygen liberated during photosynthesis comes from:     
(a) Water
(b) Chlorophyll
(c) Carbon dioxide
(d) Glucose

Question 46. In the list of organisms given below, those that reproduce by the asexual method are:   
(i) Banana (ii) Dog
(iii) Yeast (iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)

Question 47. Photosynthesis takes place in the presence of
(a) Water and sunlight
(b) Oxygen and sunlight
(c) CO₂, water and sunlight
(d) CO₂ and O₂

Question 48. Oxygen liberated during photosynthesis comes from
(a) water
(b) chlorophyll
(c) carbon dioxide
(d) glucose

Question 49. The blood leaving the tissues becomes richer in
(a) carbon dioxide
(b) water
(c) heamoglobin
(d) oxygen

Question 50. The image shows the structure of an artery. 

Which statement supports the likely reason for thick walls in arteries?
(a) To sustain the high-pressure blood from the heart.
(b) To carry large amount of blood.
(c) To ensure blood flows in only one direction.
(d) To allow easy exchange of gases with cells.

Question 51. The image shows the circulation of blood in fishes and humans. 

How is the circulation of blood in fish different from that in humans?
(a) The flow of blood in fish is unidirectional.
(b) The heart of fish has more chambers compared to that of a human.
(c) The blood goes through heart only once in fishes.
(d) The heart in fish is bigger in size

Question 52. Chlorophyll is present in
(a) Intrathylakoid space
(b) Thylakoid membrane
(c) Intermembrane space
(d) Inner membrane of envelope

Question 53. Choose the forms in which most plants absorb nitrogen
(i) Proteins (ii) Nitrates and Nitrites
(iii) Urea (iv) Atmospheric nitrogen
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Question 54. Oxygen liberated during photosynthesis comes from
(a) Water
(b) Chlorophyll
(c) Carbon dioxide
(d) Glucose

Question 55. Choose the event that does not occur in photosynthesis
(a) Absorption of light energy by chlorophyll
(b) Reduction of carbon dioxide to carbohydrates
(c) Oxidation of carbon to carbon dioxide
(d) Conversion of light energy to chemical energy

Question 56. Before removing chlorophyll, the leaf is boiled in which one of the following solvent
(a) Formalin
(b) Water
(c) Alcohol
(d) Glycerine

Question 57. Find out the structure which is not present in chloroplast
(a) Granum
(b) Stroma
(c) Cristae
(d) Thylakoid

Question 58. Which of the following statement(s) is (are) correct?
(i) Pyruvate can be converted into ethanol and carbon dioxide by yeast
(ii) Fermentation takes place in aerobic bacteria
(iii) Fermentation takes place in mitochondria
(iv) Fermentation is a form of anaerobic respiration
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)

Question 59. When temperature increases, the rate of photosynthesis
(a) Increases
(b) Decreases
(c) First increases then decreases again
(d) Remains the same

Question 60. A leaf is boiled in alcohol before using iodine for starch test in order to
(a) Dissolve starch
(b) Dissolve chlorophyll
(c) Soften the leaf
(d) Make it react with iodine

Question 61. Choose the correct statement that describes arteries.
(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart
(b) They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body
(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body
(d) They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body.

Question 62. The filtration units of kidneys are called
(a) ureter
(b) urethra
(c) neurons
(d) nephrons

Question 63. Select the incorrect statement about the autotrophs
(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
(b) They store carbohydrates in the form of starch
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
(d) They constitute the first trophic level

Question 64. In order to de-starch the leaves for an experiment to show that sunlight is necessary for photosynthesis
(a) Leaves are kept in alcohol and boiled in a water bath
(b) Leaves are soaked in iodine for two hours
(c) Plant with the leaves is kept in a dark room for 24 hours
(d) Plant with the leaves exposed to light of a lamp, a night before the experiment

Question 65. Autotrophic organisms include
(a) Bacteria and virus
(b) Bacteria and fungi
(c) Green plants and some bacteria
(d) Green plants and all bacteria

Question 66. An example for autotrophic nutrition
(a) Green plants
(b) Fungi
(c) Bacteria
(d) Humans

Question 67. Select the groups of organisms where food material is broken down outside the body and absorbed
(a) Mushroom, green plants, amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, amoeba, cuscuta
(d) Cuscuta, lice, tapeworm

Question 68. The image shows the human digestive system.     

Digestion of food starts from which organ of the digestive system?
(a) Mouth due to the presence of saliva.
(b) Pancreas that releases juices for fat breakdown.
(c) Oesophagus that moves the food in gut.
(d) Stomach which helps in mixing food with digestive juices.

Question 69. The image shows a cross section of small intestine.     

What will be the likely happen if the number of villi increases in the intestine?
(a) Increase in the absorption of food.
(b) Fast breakdown of larger food particles into smaller ones.
(c) Increase in flow of blood in the small intestine.
(d) Fast elimination of waste from the body.

Question 70. Photosynthesis is a
(a) Catabolic process
(b) Parabolic process
(c) Amphibolic process
(d) Photochemical process

Question 71. Select the appropriate equation which shows the summary of photosynthesis
(a) 6CO₂ + 12H₂O C₆H₁₂O₆ + 6O₂ + 6H₂O
(b) 6CO₂ + H₂O + Sunlight C₆H₁₂O₆ + O₂ + 6H₂O
(c) 6CO₂ + 12H₂O + Chlorophyll + Sunlight C₆H₁₂O₆ + 6O₂ + 6H₂O
(d) 6CO₂ + 12H₂O + Chlorophyll + Sunlight C₆H₁₂O₆ + 6CO₂ + 6H₂O

Question 72. Select the correct statement
(a) Heterotrophs do not synthesise their own food
(b) Heterotrophs utilise solar energy for photosynthesis
(c) Heterotrophs synthesise their own food
(d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Question 73. During respiration exchange of gases take place in
(a) Trachea an Larynx
(b) Alveoli of Lungs
(c) Alveoli and Throat
(d) Throat and Larynx

Question 74. A few drops of iodine solution were added to rice water. The solution turned blue-black in colour.
This indicated that rice water contains
(a) Complex proteins
(b) Simple proteins
(c) Fats
(d) Starch

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