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MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers

Students can practice the NCERT MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers Pdf free download is available here. Revise all the concepts easily by taking help from the MCQ Questions for Class 10 Science with Answers are prepared based on the latest exam pattern. Students can refer to these Life Processes Class 10 MCQs Questions with Answers and assess their preparation level.

Life Processes Class 10 MCQs Questions with Answers

Question 1.
The autotrophic mode of nutrition requires:
(a) carbon dioxide and water
(b) chlorophyll
(c) sunlight
(d) all of the above
Answer:
(d) all of the above

Question 2.
The largest gland in human body is:
(a) liver
(b) gastric glands
(c) pancreas
(d) salivary glands.
Answer:
(a) liver

Question 3.
Number of salivary glands found in man are:
(a) one pair
(b) two pairs
(c) three pairs
(d) five pairs
Answer:
(c) three pairs

Question 4.
Pancreatic juice helps in the digestion of:
(a) proteins
(b) proteins and fats
(c) proteins and carbohydrates
(d) proteins, carbohydrates and fats
Answer:
(d) proteins, carbohydrates and fats

Question 5.
ATP and NADP 2H are produced in:
(a) Mitochondria
(b) Chloroplast
(c) Peroxisomes
(d) Lysosomes
Answer:
(a) Mitochondria

Question 6.
Oxygen evolved during photosynthesis comes from:
(a) water
(b) CO2
(c) soil
(d) atmosphere.
Answer:
(a) water

Question 7.
Rate of photosynthesis is high in:
(a) orange light
(b) green light
(c) red light
(d) yellow light
Answer:
(c) red light

Question 8.
The ultimate source of all metabolic energy on our earth is:
(a) green plants
(b) the sun
(c) O2
(d) O2 and H2O.
Answer:
(b) the sun

Question 9.
Light reaction takes place in:
(a) grana
(b) stroma
(c) mitochondria
(d) leucoplast.
Answer:
(a) grana

Question 10.
Plants purify air by:
(a) transpiration
(b) photosynthesis
(c) respiration
(d) absorption of water
Answer:
(b) photosynthesis

Question 11.
In which process CO2 is given out:
(a) photosynthesis
(b) respiration
(c) transpiration
(d) translocation.
Answer:
(b) respiration

Question 12.
Excess glucose is stored in our body in the form of:
(a) glycogen
(b) fat
(c) protein
(d) cholesterol.
Answer:
(a) glycogen

Question 13.
Trypsin enzyme is found in:
(a) gastric juice
(b) bile juice
(c) pancreatic juice
(d) intestinal juice
Answer:
(c) pancreatic juice

Question 14.
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) Nasal cavity → Pharynx → Larynx → Trachea – Bronchi → Alveoli

Question 15.
Number of lobes in right and left lungs of man are:
(a) 3 and 2
(b) 2 and 3
(c) 4 and 2
(d) 2 and 4
Answer:
(a) 3 and 2

Question 16.
In lungs CO2 rich blood comes from:
(a) different parts of the body
(b) left ventricle
(c) right ventricle
(d) liver
Answer:
(c) right ventricle

Question 17.
Blood vessel which carries oxygenated blood from lungs is:
(a) pulmonary vein
(b) pulmonary artery
(c) coronary artery
(d) superior venacava
Answer:
(a) pulmonary vein

Question 18.
Rate of respiration in man is:
(a) about 28 times per minute
(b) 12 to 15 times per minute
(c) 25 times per minute
(d) 72 times per minute
Answer:
(b) 12 to 15 times per minute

Question 19.
Number of alveoli in lungs is:
(a) 30 thousand
(b) 30 lac
(c) 3 crore
(d) 30 crore
Answer:
(d) 30 crore

Question 20.
Lungs are enclosed in:
(a) perichondrium
(b) peritoneum
(c) pleural membrane
(d) pericardium.
Answer:
(c) pleural membrane

Question 21.
Lymph does not contain:
(a) water
(b) white blood corpuscles
(c) proteins
(d) red blood corpuscles
Answer:
(d) red blood corpuscles

Question 22.
Which blood corpuscles destroy bacteria?
(a) W.B.C
(b) R.B.C
(c) blood platelets
(d) all these
Answer:
(a) W.B.C.

Question 23.
Main function of haemoglobin is:
(a) reproduction
(b) to kill harmful bacteria
(c) transport of O2
(d) to make blood colourless
Answer:
(c) transport of O2

Question 24.
Arteries have:
(a) thick wall without valves
(b) thick wall with valves
(c) thin wall with valves
(d) thin wall without valves
Answer:
(a) thick wall without valves

Question 25.
During respiration energy is stored in the form of:
(a) ADP
(b) ATP
(c) NADP
(d) inorganic phosphate.
Answer:
(b) ATP

Question 26.
Glycolysis takes place in:
(a) cytoplasm
(b) chloroplast
(c) mitochondria
(d) ribosome.
Answer:
(a) cytoplasm

Question 27.
Which of the following substance is forced during anaerobic respiration?
(a) ethyl alcohol
(b) glycerol
(c) glucose
(d) ethylene
Answer:
(a) ethyl alcohol

Question 28.
In plants respiration takes place:
(a) during day time only
(b) during night time only
(c) during evening time only
(d) during day and night
Answer:
(d) during day and night

Question 29.
During respiration in human body:
(a) new cells are formed
(b) glucose is oxidized
(c) proteins are formed
(d) glucose is formed
Answer:
(b) glucose is oxidized

Question 30.
During aerobic respiration one molecule of glucose produces:
(a) 32 ATP
(b) 19 ATP
(c) 38 ATP
(d) 30 ATP
Answer:
(c) 38 ATP

Question 31.
Translocation of food takes place by:
(a) xylem
(b) phloem
(c) parenchyma
(d) cambium
Answer:
(b) phloem

Question 32.
Pulmonary vein brings blood into:
(a) right auricle
(b) left auricle
(c) left ventricle
(d) right ventricle
Answer:
(a) right auricle

Question 33.
Which part of the alimentary canal of man does not secretes enzyme?
(a) mouth
(b) oesophagus
(c) stomach
(d) intestine
Answer:
(b) oesophagus

Question 34.
Amoeba ingests food with the help of:
(a) cilia
(b) mouth
(c) flagella
(d) pseudopodia
Answer:
(d) pseudopodia

Question 35.
Impure blood from right ventricle goes into the:
(a) lungs
(b) heart
(c) skin
(d) liver
Answer:
(a) lungs

Question 36.
The air is purified in the following process by plants:
(a) transpiration
(b) photosynthesis
(c) respiration
(d) reproduction.
Answer:
(b) photosynthesis

Question 37.
Food is translocated by phloem in the form of:
(a) sucrose
(b) protein
(c) hormone
(d) fats
Answer:
(a) sucrose

Question 38.
Blood pressure is measured by:
(a) thermometer
(b) barometer
(c) galvanometer
(d) sphygmomanometer
Answer:
(d) sphygmomanometer

Question 39.
Urea is produced from ammonia in the body of a man in:
(a) liver
(b) kidney
(c) spleen
(d) intestine
Answer:
(a) liver

Question 40.
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) Bowman’s caspsule and glomerulus

Question 41.
Pulmonary vein opens at:
(a) right auricle
(b) left auricle
(c) left ventricle
(d) right ventricle
Answer:
(b) left auricle

Question 42.
Leaf like cartilaginous structure hanging in oesophagus is called:
(a) epipharynx
(b) epiglottis
(c) alveoli
(d) mucilage sheath.
Answer:
(b) epiglottis

Question 43.
Un-oxidised blood is circulated through pulmonary arteries into:
(a) heart
(b) lungs
(c) anterior and posterior aorta
(d) right auricle.
Answer:
(b) lungs

Question 44.
Liver secretes:
(a) saliva
(b) gastric juice
(c) bile
(d) pancreatic juice
Answer:
(c) bile

Question 45.
Enzyme amylase acts upon:
(a) fats
(b) proteins
(c) carbohydrates
(d) salts
Answer:
(c) carbohydrates

Question 46.
Muscle contraction of alimentary canal is called:
(a) digestion
(b) peristalsis
(c) circulation
(d) absorption
Answer:
(b) peristalsis

Question 47.
Pure blood is taken to various part of body by:
(a) veins
(b) vena cava
(c) right ventricle
(d) aorta
Answer:
(d) aorta

Question 48.
C shaped structure of alimentary canal is:
(a) stomach
(b) duodenum
(c) oesophagus
(d) vermiform appendix
Answer:
(b) duodenum

Question 49.
The kidneys in human beings are a part of the system for:
(a) nutrition
(b) respiration
(c) excretion
(d) transportation
Answer:
(c) excretion

Question 50.
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) transport of water

Question 51.
The number of milk teeth present in humans are:
(a) 20
(b) 24
(c) 28
(d) 32
Answer:
(a) 20

Question 52.
The length of oesophagus in humans is:
(a) 5.8 cm
(b) 25.30 cm
(c) 1.5 metres
(d) 15 feet
Answer:
(b) 25.30 cm

Question 53.
Gastric juice is secreted from:
(a) pancreas
(b) gall bladder
(c) stomach
(d) liver
Answer:
(c) stomach

Question 54.
What does a liver secrete?
(a) Saliva
(b) Gastric juice
(c) Bile juice
(d) Pancreatic juice
Answer:
(c) Bile juice

Question 55.
The energy currency is:
(a) DNA
(b) RNA
(c) ATP
(d) Chlorophyll
Answer:
(c) ATP

Question 56.
The product of alcholic fermentation is:
(a) ethyl alcohol
(b) methyl alcohol
(c) butanol
(d) All of these
Answer:
(a) ethyl alcohol

Question 57.
Dixon and Jolly are associated with:
(a) ascent of sap
(b) osmosis
(c) absorption
(d) diffusion
Answer:
(a) ascent of sap

Question 58.
Soluble only in water is:
(a) Vitamin A
(b) Vitamin D
(c) Vitamin K
(d) Vitamin C
Answer:
(d) Vitamin C

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