VBQs Life Processes Class 10 Science

VBQs Life Processes Class 10 Science with solutions has been provided below for standard students. We have provided chapter wise VBQ for Class 10 Science with solutions. The following Life Processes Class 10 Science value based questions with answers will come in your exams. Students should understand the concepts and learn the solved cased based VBQs provided below. This will help you to get better marks in class 10 examinations.

Life Processes VBQs Class 10 Science

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

Question. What prevents back flow of blood inside the heart during contraction?   
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above 

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. Choose the correct path of urine in our body :   
(a) kidney → ureter → urethra → urinary bladder
(b) kidney → urinary bladder → urethra → ureter
(c) kidney → ureters → urinary bladder → urethra
(d) urinary bladder → kidney → ureter → urethra

Question. Which is the correct sequence of parts in human alimentary canal? 
(a) Mouth → stomach → small intestine → oesophagus → large intestine
(b) Mouth → oesophagus → stomach → large intestine → small intestine
(c) Mouth → stomach → oesophagus → small intestine → large intestine
(d) Mouth → oesophagus → stomach → small intestine → large intestine 

Question. As air passes through the nasal cavity, it is   
(a) Filtered in the nostrils
(b) Moistened by mucus
(c) Warmed to the body temperature
(d) All of these

Question. During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the   
(a) cytoplasm
(b) chloroplast
(c) mitochondria
(d) golgi body

Question. Which of the following is used artificially to remove nitrogenous waste products from the blood?   
(a) Ventilator
(b) Transfusion
(c) Hemodialysis
(d) Angiogram

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. 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 of the following completes the given equation? Glucose + Oxygen → (?)   
(a) Only carbon dioxide + water + energy
(b) Only carbon dioxide + water
(c) Only carbon dioxide
(d) Only water + energy 

Question. In which of the following vertebrate group/ groups, heart does 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. Which of these statements is correct about alveoli?   
(a) They form a very large surface area.
(b) They have a very thin wall.
(c) They are covered with blood capillaries.
(d) All of these

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

Question. Which of the following statements about the autotrophs is incorrect?   
(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 in food chains

Question. Which of the following substances are removed from blood in the kidneys?   
(a) Water
(b) Urea
(c) Sodium
(d) Ammonia

Question. Which of the following take place after we exercise?
(a) Out body needs more oxygen.
(b) Our body needs to replace the energy used.
(c) Our body needs to get rid of excess carbon dioxide.
(d) All of these 

Question. In which of the following groups of organisms, 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. 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. Which of these statements is correct about the function of blood?
(a) It helps in transportation of respiratory gases.
(b) It regulates body temperature.
(c) It helps in transportation of waste products.
(d) All the above

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

Question. Match the words of Column (a) with that of Column (b)

(a) A – (ii), B – (i), C – (iv), D – (iii)
(b) A – (iii), B – (ii), C – (i), D – (iv)
(c) A – (iv), B – (iii), C – (ii), D – (i)
(d) A – (i), B – (iv), C – (iii), D – (iv)

Question. The correct sequence of anaerobic reactions in yeast is
(a) Glucose cytoplasm → Pyruvate → mitochondria Ethanol + Carbon dioxide
(b) Glucose cytoplasm → Pyruvate → cytoplasm Lactic acid
(c) Glucose cytoplasm → Pyruvate → mitochondria Lactic acid
(d) Glucose cytoplasm → Pyruvate → cytoplasm Ethanol + Carbon dioxide

Question. Which of the following is the structural and functional unit of the excretory system?
(a) Neuron
(b) Nephron
(c) Alveolus
(d) Both (a) and (b)

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

Question. Each nephron has a cup shaped upper end called ________, which contains a _______.
(a) Bowman’s capsule, Ampulla
(b) Capillaries, Bowman’s capsule
(c) Ampulla, Glomerulus
(d) Bowman’s capsule, Glomerulus

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

Assertion And Reason Based MCQs :

Directions : In the following questions, A statement of Assertion (a) is followed by a statement of Reason (R). Mark the correct choice as:
(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 and R is true.

Question. Assertion (A): Plants have low energy needs.
Reason (R): Plant bodies have large proportion of dead cells.

Question. Assertion (A): Digestion breaks large complex molecules to simple smaller molecules which can be easily absorbed.
Reason (R): Digestion is necessary for the absorption of all molecules.

Question. Assertion (A): Valves are present in the arteries.
Reason (R): Arteries carry oxygenated blood from heart to different body parts except pulmonary artery.

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

Question. Assertion (A): Alveoli contain an extensive network of blood vessels.
Reason (R): Alveoli is the site where exchange of gases occurs.

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

Question. Assertion (A): Excretory unit of kidneys are nephrons.
Reason (R): It has no role in secretion of urine.

Question. Assertion (a): Humans are not truly aerobic.
Reason (R): They produce lactic acid anaerobically.

Question. Assertion (a): In humans, major amount of water is absorbed by the tubular part of nephron.
Reason (R): Absorption of water depends on the dissolved waste to be excreted from the body.

Question. Assertion (A): Lipases help in emulsification of fats.
Reason (R): Lipases hydrolyses fats and oils.

Question. Assertion (A): The muscular walls of ventricles are thicker than auricles.
Reason (R): This helps in preventing the back flow of blood.

Question. Assertion (A): In human heart, there is no mixing of oxygenated and deoxygenated blood.
Reason (R): Valves are present in the heart which allows the movement of blood in one direction only.

Question. Assertion (A): HCl converts pepsinogen into active enzyme pepsin.
Reason (R): Pepsin converts protein into proteoses and peptones.

Question. Assertion (A): Human body produces highly toxic substances, which if not eliminated may cause the death.
Reason (R): Excretory substance removes nitrogenous waste from the body.

Question. Assertion (A): In humans, there is a complex respiratory system.
Reason (R): Human skin is impermeable to gases.

Question. Assertion (A): Photosynthesis is an anabolic process.
Reason (R): The process of photosynthesis occurs in chlorophyll.

Case Based Questions :

I. Read the given passage and answer any of the four questions from Sanjana is suffering from a frequent stomach pain and vomiting. She went to the Doctor. The doctor asked her to go for an ultrasound. In the report, a stone was found in her gall bladder. Doctor asked her to remove the gall bladder by operation. But she was reluctant to go for the operation.

Question. Which of the following statement is correct about bile?
(a) It helps in emulsification of fat.
(b) It helps in digestion of carbohydrates
(c) It helps in absorption of digested food.
(d) It helps in egestion of undigested food.

Question. Which part of alimentary canal receives bile from the liver?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Oesophagus

Question. What is the function of bile salt in the intestine?
(a) Activator of lipase
(b) Emulsifier
(c) Co factor of cholesteryl esterase
(d) Inhibitor of lipid absorption

Question. The role played by gall bladder in human body is
(a) To store bile
(b) To secrete bile
(c) To emulsify fats
(d) To digest fats

Question. Removal of gall bladder
(a) affects the person’s health
(b) Has no effect on the person’s health
(c) Effects the secretion of bile
(d) Effects the digestion of proteins

II. The given diagram is of human digestive human.
Study the diagram and answer any of the four questions from

Question. Name the digestive juice that lacks enzyme but helps in digestion.
(a) Bile juice
(b) Pancreatic juice
(c) Ptyalin
(d) Pepsin

Question. The digestion of food starts in
(a) A
(b) D
(c) E
(d) F

Question. In case of diarrhoea, which major process does not takes place normally in region F?
(a) Absorption of food
(b) Absorption of water
(c) Secretion of hormones
(d) Removal of waste material

Question. Which of these correctly represent the labels B, C, D and E?
(a) B- Oesophagus, C- Liver, D- Stomach, Epancreas
(b) B- Pancreas, C- Oesophagus, D- Liver, EStomach
(c) B- Stomach, C- Pancreas, D- Oesophagus, ELiver
(d) B- Liver, C- Stomach, D- Pancreas, EOesophagus

Question. The secretion that is released by label C is:
(a) Bile
(b) Pepsin
(c) Saliva
(d) Gastric juice

III. Study the given flow chart and answer any of the four questions from

Question. In which of these organisms the process Z takes place?
(a) Bacteria
(b) Humans
(c) Yeast
(d) Spirogyra

Question. In which part of human body do the process Z takes place?
(a) In muscle cells
(b) In kidneys
(c) In liver cells
(d) In leydig’s cell

Question. Where does aerobic respiration occur in a cell ?
(a) Mitochondria
(b) Cytoplasm
(c) Nucleus
(d) Plastid

Question. Identify X, Y and Z.
(a) X-Glycolysis, Y-Anaerobic, Z-Aerobic
(b) X-Krebs’s cycle, Y-Aerobic, Z-Anaerobic
(c) X-Glycolysis, Y-Aerobic, Z-Anaerobic
(d) X-Glycolysis, Y-Aerobic, Z-Krebs’s cycle

Question. The process X occurs in ________ and Y occurs in _________ part of cell.
(a) Mitochondria and cytoplasm respectively
(b) Cytoplasm and mitochondria respectively
(c) Both takes place in cytoplasm
(d) Both takes place in mitochondria

IV. Study the diagram of human respiratory system and answer any of the four questions .

Question. Trachea is divided into two smaller tubes called _________.
(a) Bronchi
(b) Bronchioles
(c) Larynx
(d) Alveoli

Question. Which of these is the function of balloon like structure present in lungs?
(a) Exchange of gases
(b) Absorption of nutrients
(c) Transport of food
(d) Removal of waste materials

Question. The balloon like structures present in ‘S’ is:
(a) Nephron
(b) Alveoli
(c) Bronchi
(d) Bronchiole

Question. Which of these organ is surrounded by cartilaginous rings?
(a) P
(b) Q
(c) R
(d) S

Question. Which of these statements is incorrect regarding human lungs?
(a) It is the secondary organ for respiration.
(b) It is located on the two sides of heart.
(c) The membrane that encloses lungs is pleural membrane.
(d) The alveolar epithelium of lungs is non-ciliated epithelium.

V. The given diagram represents the structure of human excretory system. Study the diagram and answer any of the four questions from

Question. How can we purify the blood by artificial methods?
(a) Filtration
(b) Dialysis
(c) Reabsorption
(d) All of these

Question. The main waste present in the urine is:
(a) Glucose
(b) Urea
(c) Blood
(d) Protein

Question. Identify the part 1 in excretion.
(a) Kidney
(b) Ureter
(c) Urethra
(d) Nephron

Question. Which of these is the structural and functional unit of part 2?
(a) Alveoli
(b) Nephron
(c) Neuron
(d) None of these

Question. Choose the correct path of urine in our body:
(a) kidney → ureter → urethra → urinary bladder
(b) kidney → urinary bladder → urethra → ureter
(c) kidney → ureters → urinary bladder → urethra
(d) urinary bladder → kidney → ureter → urethra

VI. Read the given passage and answer any of the four questions from Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart on the left.
The left upper chamber (a) then relaxes. It then contracts and the blood is allowed to enter the next chamber (b), as it expands. When the muscular left lower chamber of heart contracts the blood is pumped out to the body via aorta.
Deoxygenated blood reaches from the body to the upper chamber on the right side of heart (c) and it expands. As this part contracts, the corresponding lower chamber (d) dilates. This transfers the blood to right ventricle, which in turn pumps it to the lungs for oxygenated.

Question. Which chambers of human heart contain oxygenated blood?
(a) A and B
(b) A and C
(c) C and B
(d) C and D

Question. What prevents backflow of blood inside the heart during contraction?
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above

Question. Which of these correctly represents the label A, B, C and D in the above passage?
(a) A- Left atrium, B- Left Ventricle, C- Right atrium, D- Right ventricle
(b) A- Right ventricle, B- Left atrium, C- Left Ventricle, D- Right atrium
(c) A- Right atrium, B- Right ventricle, C- Left atrium, D- Left ventricle
(d) A- Left ventricle, B- Right atrium, C- Right ventricle, D- Left atrium

Question. Assertion (a): Human heart does not allow mixing of oxygen rich blood with carbon dioxide rich blood.
Reason (R): Human heart has different chambers.
(a) Both A and R are true and R is correct explanation of the assertion.
(b) Both A and R are true but R is not the correct explanation of the assertion.
(c) A is true but R is false.
(d) A is false but R is true.

Question. What is the correct route of blood in a human?
(a) A → B → Lungs → C → D
(b) A → B → D → C → Lungs
(c) C → D → B → A → Lungs
(d) C → D → Lung → A → B

VII. Read the passage and answer any of the four questions from Some experiments were carried out using Croton sp.
plants to understand the process of photosynthesis.
It was observed that the leaves of the plant exposed to light for longer duration accumulated more starch. However, due to presence of pre-formed starch in the leaves, it was difficult to find the net productivity on a fixed exposure to light source.
Therefore, it was necessary to obtain starch free leaves in the plant before starting the experiment.

Question. Some of the starch free leaves were coated with wax on both the surfaces. The plant was maintained under normal environmental conditions. At the end of the experiment, the wax coated leaves are likely to show _____.
(a) Accumulation of more water.
(b) Wilting of the wax coated leaves.
(c) Increase in sucrose accumulation.
(d) Decrease in number of chloroplasts

Question. During the morning hours, using a fine blade, an incision was made to the leaves such that the phloem tissue was cut open. Analysis of the liquid oozing out was found to contain high amount of:
(a) Xylose
(b) Ribose
(c) Sucrose
(d) Galactose

Question. The equation given below represents photosynthesis. Identify P and Q.
P + water sunlight/chlorophyll glucose + Q
(a) P – Carbon dioxide, Q – Oxygen
(b) P – Oxygen, Q – Oxygen
(c) P – Carbon dioxide, Q – Carbon dioxide
(d) P – Oxygen, Q – Carbon dioxide

Question. Which of the following would help obtain starch free leaves in the plant?
(a) Expose the leaves to blue light for 48 hours before starting the experiment.
(b) Keep the plant in dark for about 48 hours before starting the experiment.
(c) Remove starch from the leaves by exosmosis, 48 hours before starting the experiment.
(d) Keep the leaves to red light for 48 hours before starting the experiment.

Question. After a period of illumination, the leaves were boiled in alcohol to make them colourless. Which of the following could be used to test the end product stored in the leaves?
(a) Cobalt chloride paper
(b) Litmus paper
(c) Iodine solution
(d) Copper sulphate solution