MCQ Questions Chapter 6 Life Processes Class 10 Science

Please refer to MCQ Questions Chapter 6 Life Processes Class 10 Science with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 10 Science issued for the current academic year. We have provided MCQ Questions for Class 10 Science for all chapters on our website. Students should learn the objective based questions for Chapter 6 Life Processes in Class 10 Science provided below to get more marks in exams.

Chapter 6 Life Processes MCQ Questions

Please refer to the following Chapter 6 Life Processes MCQ Questions Class 10 Science with solutions for all important topics in the chapter.

Question. The site of photosynthesis in the cells of a leaf is
(a) chloroplast
(b) mitochondria
(c) cytoplasm
(d) protoplasm

Question. If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?
(a) Proteins breaking down into amino acids
(b) Starch breaking down into sugars
(c) Fats breaking down into fatty acids and glycerol
(d) Absorption of vitamins

Question. A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains
(a) complex proteins
(b) simple proteins
(c) fats
(d) starch

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

Question. The autotrophic mode of nutrition requires   
(a) carbon dioxide and water
(b) chlorophyll
(c) sunlight
(d) All of the above

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

Question. The kidneys in human beings are a part of the system for   
(a) nutrition
(b) respiration
(c) excretion
(d) transportation

Question. 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. Which region of the alimentary canal absorbs the digested food?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Liver

Question. 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

Question. From the given picture of the digestive system, identify the part labelled as gastric gland.  (Diagram)
(a) A
(b) B
(c) C
(d) D

Question. Large intestine in man mainly carries out
(a) absorption of water
(b) assimilation
(c) digestion of fats
(d) digestion of carbohydrates

Question. Among the following choose the correct option which includes the organisms that have a holozoic mode of nutrition:
(a) Plasmodium and Amoeba
(b) Parakeet and Amoeba
(c) Paramecium and Plasmodium
(d) Paramecium and Parasite

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

Question. Glycolysis process occurs in which part of the cell?
(a) Cytoplasm
(b) Nucleus
(c) Mitochondria
(d) Chloroplast

Question. The process by which Amoeba obtains food is called
(a) phagocytosis
(b) assimilation
(c) diffusion
(d) absorption

Question. Which of the following is not a digestive enzyme contained in the pancreatic juice?
(i) Lipase (ii) Hydrochloric acid
(iii) Mucus (iv) Trypsin
(a) (i) and (ii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (i) and (iii)

Question. 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

Question. Arteries and veins are connected by a network of extremely narrow tubes called
(a) sieve tubes
(b) capillaries
(c) vena cava
(d) valves

Question. Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?
(a) Ethanol + Carbon dioxide + Energy
(b) Lactic acid + Energy
(c) Carbon dioxide + Water + Energy
(d) Pyruvate

Question. Name the pores in a leaf through which respiratory exchange of gases takes place.
(a) Lenticels
(b) Vacuoles
(c) Xylem
(d) Stomata

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

Question. Which plant tissue transports water and minerals from the roots to the leaf?
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Collenchyma

Question. A blood vessel which pumps the blood from the heart to the entire body is called
(a) artery
(b) capillary
(c) vein
(d) haemoglobin

Question. Which part of nephron allows the selective reabsorption of useful substances like glucose,amino acids, salts and water into the blood capillaries?
(a) Tubule
(b) Glomerulus
(c) Bowman’s capsule
(d) Ureter

Question. Where is the dirty blood in our body filtered?
(a) Heart
(b) Lungs
(c) Ureter
(d) Kidneys

Question. 

The above diagram is L.S. of a stem. If the liquid flowing through the sieve tube is examined, it is found to contain :-   
(a) sugar and cellulose
(b) sugar and oil
(c) amino acids and sugar
(d) amino acids and cellulose

Question.   

The above graph shows result of an experiment that :-
(a) ATP is produced by green cells only when there is light present
(b) most of the ATP of green cells comes from photosynthetic activity
(c) water is the source of the oxygen produced during photosynthesis
(d) photosynthesis cannot take place in the absence of chlorophyll

Question. The part of the digestive system where no digestion takes place is
(a) ileum
(b) stomach
(c) mouth
(d) oesophagus

Question. The fermentation of glucose by yeast normally yields
(a) alcohol, CO₂ and 36 ATP
(b) CO₂, H₂O and 36 ATP
(c) alcohol, CO₂ and 2 ATP
(d) lactic acid, CO₂ and 2 ATP

Question. A large quantity of one of the following is removed from our body by lungs?
(a) CO₂ and H₂O
(b) CO₂ only
(c) H₂O only
(d) Ammonia

Question. In respiration, air passes through
(a) Pharynx → nasal cavity → larynx → trachea bronchi → bronchioles
(b) Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles
(c) Larynx → nasal cavity → pharynx → trachea
(d) Larynx → pharynx → trachea → lungs

Question. A biochemical compound that readily combines with oxygen and distributes it throughout the human body is
(a) water
(b) urea
(c) haemoglobin
(d) acetylcholine

Question. The process in which loss of water takes place in the form of water vapour through stomata is called
(a) transportation
(b) transpiration
(c) guttation
(d) translocation

Question. In a closed circulatory system, blood is completely enclosed within
(a) vessels
(b) heart
(c) skeleton
(d) sinuses

Question. Normal blood pressure (systolic/diastolic) is
(a) 120/80 mm of Hg
(b) 160/80 mm of Hg
(c) 120 60 mm of Hg
(d) 180/80 mm of Hg

Question. Blood pressure is measured by an instrument called
(a) barometer
(b) sphygmomanometer
(c) photometer
(d) manometer

Question. Which of the following statements is not correct?
(a) Deoxygenated blood is poured into right atrium of heart.
(b) The excretory units of flatworms are flame cells.
(c) Human kidney has about 1 million nephridia.
(d) Tracheids and vessels are non-living conducting tissues.

Question. The chlorophyll in photosynthesis is used for
(a) absorbing light
(b) breaking down water molecule
(c) no function
(d) reduction of CO₂

Question. Many people in the sub-Himalayan region are known to suffer from goitre. This can be cured if one takes food containing
(a) excess of calcium
(b) iodized salt
(c) vitamin C
(d) vitamin B.

Question. The heart pumps only deoxygenated blood :-
(a) shark
(b) frog
(c) whale
(d) crocodile

Question. Which is not a salivary gland?
(a) Sublingual
(b) Submaxillary
(c) Lachrymal
(d) Parotid

Question. Vermiform appendix is made up of
(a) respiratory tissue
(b) excretory tissue
(c) lymphatic tissue
(d) digestive tissue

Question. In the diagram of the section of hyaline cartilage given below, certain parts have been indicated by alphabets, choose the answer in which these alphabets have been correctly matched with the pairs which they indicate :-

(a) A = Blood vessel, B = Capsular matrix, C = Perichondrium, D = Lacunae, E = Chondrin, F = Chondrocytes
(b) A = Blood vessel, B = Perichondrium, C = Chondrin, D = Lacunae, E = Chondrocytes, F = Capsular matrix
(c) A = Blood vessel, B = Perichondrium, C = Lacunae, D = Chondrin, E = Capsular matrix, F = Chondrocytes
(d) A = Chondrin, B = Capsular matrix, C = Blood vessel, D = Perichondrium, E = Lacunae, F = Chondrocytes

Question. At night when one is sleeping the body temperature is mainly maintained by the :-
(a) activity of liver cells
(b) activity of voluntary muscle cells
(c) activity of involuntary muscle cells
(d) activities mentioned above

Question. Lungs have a large number of alveoli for
(a) having spongy texture and proper shape
(b) more surface area for diffusion of gases
(c) more space for increasing volume of inspired air
(d) more nerve supply

Question. Removal of faeces or undigested food from the body is not an example of excretion because :-
(a) faeces is given out of the alimentary canal
(b) it has not been digested by the body
(c) undigested food is not a product of metabolism
(d) if it remains in the body, it produceds foul gases

Question. Which of the following regions of the alimentary canal of man does not secrete a digestive enzyme?
(a) Oesophagus.
(b) Stomach
(c) Duodenum
(d) Mouth

Question. The covering of lungs is called
(a) pericardium
(b) pleural membrane
(c) perichondrium
(d) peritoneum

Question. Proteins after digestion are converted into
(a) carbohydrates
(b) small globules
(c) amino acids
(d) starch

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

Question. Which of the following are chiefly digested in the stomach?
(a) Carbohydrates
(b) Proteins
(c) Lipids
(d) Fats

Question. Carbohydrates in the plants are stored in the form of
(a) glycogen
(b) starch
(c) glucose
(d) maltose

Question. Opening and closing of pores is a function performed by
(a) stomata
(b) chlorophyll
(c) chloroplast
(d) guard cells

Question. Bile juice is secreted by
(a) stomach
(b) pancreas
(c) small intestine
(d) liver

Question. During cellular respiration one molecule of glucose is first broken down into two molecules of
(a) Acetic acid
(b) Pyruvic acid
(c) Lactic acid
(d) None of the above

Question. Materials like sucrose are transported into phloem by using energy from
(a) ATP
(b) NADP
(c) ADP
(d) Carbohydrates

Question. The opening and closing of stomatal pore depends upon
(a) Oxygen
(b) Temperature
(c) Water in guard cells
(d) Concentration of CO2 in stomata

Question. The mode of nutrition in which an organism derives its food from the body of another living
organism without killing it
(a) Saprotrophic nutrition
(b) Parasitic nutrition
(c) Holozoic nutrition
(d) Autrotrophic nutrition

Question. The mode of nutrition found in fungi is
(a) Saprotrophic nutrition
(b) Parasitic nutrition
(c) Holozoic nutrition
(d) Autrotrophic nutrition

Question. The organisms that absorbs nutrition with haustoria are
(a) Carnivore
(b) Herbivore
(c) Parasite
(d) Saprophyte

Question. The food we eat gets converted into energy and stored in our body in the form of
(a) Glucose
(b) Glycogen
(c) Glucagon
(d) Starch

Question. The process by which Amoeba obtains food is called
(a) Phagocytosis
(b) Assimilation
(c) Diffusion
(d) Absorption 

Question. Find out the correct sequence of parts in human alimentary canal
(a) Mouth Oesophagus Stomach Small intestine Large intestine
(b) Mouth Stomach Small intestine Oesophagus Large intestine
(c) Mouth Oesophagus Stomach Large intestine Small intestine
(d) Mouth Stomach Oesophagus Small intestine Large intestine

Question. On seeing good food our mouth waters. This fluid is actually
(a) Water
(b) Hormone
(c) Enzyme
(d) None of the above

Question. Respiration is a process in which
(a) Energy is stored in the form of ATP
(b) Energy is released and stored in the form of ATP
(c) Energy is used up
(d) Energy is not released at all

Question. A biochemical compound that readily combines with oxygen and distributes it throughout the human body is
(a) Water
(b) Urea
(c) Haemoglobin
(d) Acetylcholine

Question. If salivary amylase is lacking the saliva, the events that get affected in the mouth cavity will be
(a) Proteins breaking down into amino acids
(b) Starch breaking down into sugars
(c) Fats breaking down into fatty acids and glycerol
(d) Absorption of vitamins

95. A student setup an experiment to study the human respiratory system. In the experiment, the student places candle and a living cockroach in the flask A, while a candle and a dead cockroach in flask B. The burning of candle needs oxygen.      (Diagram)

After 10 minutes, the student observes that the candle in flask A extinguish faster while candle in flask B keeps burning for a longer time. What can be evaluated from this experiment?
(a) Water vapours produced by living beings prevents burning of candle.
(b) Living beings consumes oxygen during respiration.
(c) Burning of candle decreases the life span of cockroach.
(d) Candle produces high amount of carbon dioxide. 

Question. The image shows oxygenated and de-oxygenated blood in the human heart.    
What is the direction of deoxygenated blood from right ventricle of the heart?
(a) towards the lungs.
(b) towards the left atrium of heart.
(c) towards the upper body.
(d) towards the lower body.

Question. The inner lining of stomach is protected by one of the following from hydrochloric acid.
Choose the correct one.
(a) Pepsin
(b) Mucus
(c) Salivary amylase
(d) Bile

Question. Movement of food through oesophagus is due to
(a) Lubrication by saliva
(b) Peristalsis
(c) Gravitational pull
(d) All the above

Question. The solution added to the leaf after boiling it in alcohol and then washing it with water is
(a) Benedict‘s solution
(b) Brine solution
(c) I M sucrose solution
(d) Iodine solution

Question. Photosynthetic cells contain
(a) Chlorophylls
(b) Carotenoids
(c) Xanthophylls
(d) All of these

Question. The group of organisms which has the longest small intestine are
(a) Omnivores
(b) Carnivores
(c) Herbivores
(d) Autotrophs

Question. Bile juice is produced in
(a) Gall bladder
(b) Blood
(c) Liver
(d) Spleen

Question. Chyme is
(a) Digestive enzyme secreted by stomach
(b) Hormone secreted by islets of Pancreas
(c) Food which enters into intestine from stomach
(d) Part of bile juice which stores in gall bladder

Question. The role of bile during digestion is
(a) Emulsification of fat
(b) Digestion of fat
(c) Absorption of fat
(d) Assimilation of fat

Question. Proteins after digestion are converted into
(a) Carbohydrates
(b) Small globules
(c) Amino acids
(d) Starch

In the following question, a statement of Assertion
(A) is followed by a statement of Reason (R). Answer these questions by selecting appropriate option given below:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
(c) Assertion (A) is true but Reason (R) is false.
(d) Assertion (A) is false but Reason (R) is true.

Question. Assertion (A): Energy is used during the process of respiration.   
Reason (R): Respiration stores energy in the form of ATP.

Question. Assertion (A): Haemodialysis can save the life of patients with kidney failure.   
Reason (R): Waste products like urea can be removed from the blood by haemodialysis.

Question. Assertion (A): Transpiration is a necessary evil.   
Reason (R): It causes water loss but helps in absorption and upward movement of water and minerals.

Question. Assertion (A): Muscles of stomach wall possess thick layers of muscles.   
Reason (R): These muscles help in mixing the food with the enzymes present in the alimentary canal.

Question. Assertion (A): Artificial kidney is a device used to remove nitrogenous waste products from the blood through dialysis.   
Reason (R): Reabsorption does not occur in artificial kidney.

In the following questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following.
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) The statement of the Assertion is false but the Reason is true.

Question. Assertion: Human being has a complex respiratory system   
Reason : Human skin is impermeable to gases

Question. Assertion: Plants lack excretory organs     
Reason : Plants usually absorb essential nutrients

Question. Assertion: When air is passed through lime water, it turns milky 
Reason : Air contains 78% nitrogen and 21% oxygen

Question. Assertion: Human heart does not allow mixing of oxygen rich blood with Carbon dioxide rich blood   
Reason : Human heart has different chambers

Question. Assertion: Aerobic respiration requires less energy as compared to anaerobic respiration   
Reason : Mitochondria is the power of the cell

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