There is only one chapter from Biology in the Term-I examination 2021-22 so here you are provided with MCQ questions for Class 10 Science Biology Chapter 6 Life Processes. According to the new CBSE syllabus for Academic session 2021-22, examinations will be conducted in two terms – Term I and Term II.
Here most important MCQs have been
provided so you can do better in your coming examination.
MCQ Questions for Class 10 Science Biology Chapter 6 Life Processes
All MCQ Questions for Class 10 Science Biology
Chapter 6 have been prepared according to new pattern of 10 Board Examinations
and completely based on NCERT Science book of class 10.
We have prepared MCQs with correct answers and explanation so that you will be to understand
the basic concept of questions.
For detailed and thorough study you can
also check NCERT Solution of Class 10 Science Biology Chapter 6 Life Processes.
The students can download MCQ Questions
for Class 10 Science Biology Chapter 6 in PDF format form the link given below.
Chapter 6 Life Processes
Multiple Choice Questions
Choose
correct answer:
1.
Green
plants are
(a) Autotroph
(b)Parasite
(c) Saprophyte
(d)Heterotroph
Correct answer-(a)
Explanation- Green plants prepare
their food on their own by the photosynthesis so they are called autotrophs. They
don’t depend on other living organism for food.
2. Bacteria
are
(a)Autotroph
(b)Parasite
(c) Saprophyte
(d)Parasites and saprophytes
Correct answer-(d)
3. In case of
nutrition, man is
(a) Autotroph
(b) Parasite
(c) Saprophyte
(d) Heterotroph
Correct answer-(d)
Explanation- Man get his food form
plants and animals so man is heterotroph.
4.Characteristics
of life is
(a) Movements
(b)Breathing
(c) Molecular movement
(d)Nutrition
Correct answer-(c)
Explanation- In all living organism,
there take place various biological reactions through all life but after death
there is no molecular movement in organisms.
5. The process
of acquiring oxygen from outside the body for the breakdown of food sources for
cellular needs, is termed as
(a) Nutrition
(b)Excretion
(c) Respiration
(d)all of the above
Correct answer-(c)
6. Cuscuta is
a / an
(a) Autotroph
(b)Parasite
(c) Saprophyte
(d)Heterotroph
Correct answer-(b)
7. Fungi and
yeasts are
(a) Autotroph
(b)Parasite
(c) Saprophyte
(d)Heterotrophs
Correct answer-(c)
Explanation- Fungi and yeast get
their food or nutrition from dead organic matter.
8. Which is
having a holozoic nutrition
(a) amoeba
(b)Frog
(c) Human being
(d)All the above
Correct answer-(d)
9. Chlorophyll
pigments are present in
(a) Chloroplasts
(b) Root-hairs
(c) Stomata
(d)Lenticels
Correct answer-(a)
10. Digested
food is absorbed in
(a)Stomach
(b)Small intestine
(c)Rectum
(d)Stomach and small intestine both
Correct answer-(b)
Explanation- Small intestine has
small finger-like projections called villi that increase the surface area for absorption
of food, so maximum absorption of food takes place in small intestine.
11. Starch
forms a colour in
(a) Bromine water
(b)Permanganate solution
(c) Iodine solution
(d)Acidic solution
Correct answer-(c)
12. Energy
released in respiration is stored in the form of
(a) ADP
(b)NADP
(c)ATP
(d)PI
Correct answer-(c)
Explanation- ATP- Adenosine Tri Phosphate, is called
currency of energy.
13. Water in
plants is transported through
(a) Phloem
(b)Xylem
(c) Phloem and xylem both
(d)None of the above
Correct answer-(b)
14. Phloem
transports
(a) Minerals
(b)Food prepared by leaves
(c) Water
(d)All the above
Correct answer-(b)
15. Green
plants require for photosynthesis
(a) Water
(b)Sunlight
(c) Carbon oxide
(d)All the above
Correct answer-(d)
16. A
stationary source of food is
(a) Grass
(b)Rabbit
(c) Cow
(d) Dog
Correct answer-(a)
17. In plants,
diffusion of air takes place by
(a) Stomata
(b)Lenticels
(c) Intercellular space
(d)All the above
Correct answer-(d)
18.In the
process of photosynthesis, plants evolve
(a) Oxygen
(b)Carbon dioxide
(c)Oxygen and carbon
dioxide both
(d)Neither oxygen nor carbon dioxide
Correct answer-(a)
19. Complete
oxidation of glucose gives molecules of ATP
(a)32
(b)19
(c)83
(d)38
Correct answer-(d)
20.Enzyme
trypsin acts on
(a)Source
(b)Fats
(c) Starch
(d)Proteins
Correct answer-(d)
21.Anaerobic
respiration takes place in
(a) Certain bacteria
(b)Yeast
(c) Our muscles
(d)All the above
Correct answer-(d)
22.Exchange of
gases in tissues takes place due to difference in
(a)Temperature
(b)Concentration of gases
(c)PH of
gases
(d)None of the above
Correct answer-(b)
23. Oxidation of simple food molecules occurs in
(a) nucleus
(b)Lysosome
(c) Mitochondria
(d)Ribosomes
Correct answer-(c)
24. In normal conditions rate of breathing per minute, in human
beings is
(a)10 to 12 times
(b)12 to 15 times
(c)15 to 18 times
(d)72 to 75 times
Correct answer-(c)
25. In acidic medium, enzyme .................. acts
(a) Pepsin
(b)Trypsin
(c) Lipase
(d)All the above
Correct answer-(a)
26. Which is correct about lymph
(a)It is light yellow
coloured fluid
(b)It flows only in one direction that is from tissues to heart
(c)Lymph cells fight
against infection
(d)All the above
Correct answer-(d)
27. Excretion in man takes place through
(a)Contractile vacuole
(b)Nephridia
(c)Heart
(d)None of the above
Correct answer-(d)
28. Hemoglobin is present in
(a) WBC
(b)Lymph
(c) RBC
(d)Platelets
Correct answer-(c)
29.Amoeba
uses........... to capture food particles
(a)Cilia
(b)Pseudopodia
(c) Tentacles
(d)Forelegs
Correct answer-(b)
30. Human
saliva contains enzyme
(a) Pepsin
(b)Trypsin
(c) Ptyalin
(d)Amylase
Correct answer-(c)
31. Blood clotting takes place with the assistance of
(a)WBC
(b)Lymph
(c) RBC
(d)Platelets
Correct answer-(d)
32. Pure blood is found in
(a) Right auricle
(b)Pulmonary vein
(c)Pulmonary artery
(d)All the above
Correct answer-(b)
33. Pumping rate of heart of a healthy person in rest, is
(a) 70 per minute
(b)120 per minute
(c) 30 per minute
(d)45 per minute
Correct answer-(a)
34. Systolic and diastolic pressures for a healthy heart of a
resting adult are
(a) 80/120
(b)120/200
(c) 120/80
(d)200/150
Correct answer-(c)
35. Evaporation of water from the leaf surface, is called as
(a) Respiration
(b)Photosynthesis
(c) Pulmonary artery
(d)All the above
Correct answer-(d)
36. Bowman capsule is present in
(a) small intestine
(b)Kidneys
(c) Heart
(d)Brain
Correct answer-(b)
37. Stomach of man mainly digests
(a) Proteins
(b)Fats
(c) Carbohydrates
(d)All the above
Correct answer-(a)
38. Human body loses water by
(a) Sweating and excretion
(b)Excretion and breathing
(c) Sweating and breathing
(d)Sweating, breathing and excretion
Correct answer-(d)
39. The main nitrogenous waste in man is
(a)Ammonia
(b)Urea
(c) Ureter
(d)Nephridia
Correct answer-(b)
40. Vital structural and functional unit of vertebrate kidney is
(a) Uriniferous tubule
(b)Seminiferoes tubules
(c) Ureter
(d)Nephridia
Correct answer-(d)
41. The incorrect statement about autotrophs, is
(a) They prepare food by the process of photosynthesis
(b)They complete photosynthesis in the absence of sunlight
(c) They store food in
the form of starch
(d)They are producers
Correct answer-(b)
42. A potted plant was placed in dark for 72 hours. Then a leaf was
plucked, It was boiled in water and placed in alcohol. Iodine solution was
poured on the leaf. The leaf will
(a) Become blue black
(b)Become reddish brown
(c) Become yellow
(d) Show no change
Correct answer-(d)
43. A few drops of iodine solution were added to rice water. It
became blue-black. It shows the presence of ............. in rice water
(a) Starch
(b Proteins
(c) Fats
(d)Sugar
Correct answer-(a)
44. The event that does not take place in photosynthesis, is
(a) Absorption of light energy by chlorophyll
(b)Oxidation of carbon to carbon dioxide
(c) Conversion of solar
energy to chemical energy
(d) Reduction of carbon dioxide to carbohydrates
Correct answer-(b)
45. Oxygen given out during photosynthesis, comes from
(a) Glucose
(b)Water
(c) Chlorophyll
(d)Carbon dioxide
Correct answer-(b)
46. Opening and closing of stomata depends on
(a) Oxygen
(b)Water in guard cells
(c)Concentration of CO2 in stomata
(d)Temperature
Correct answer-(b)
47. Plants absorb nitrogen in the form of
(a) Urea
(b)Proteins
(c) Atmospheric nitrogen
(d)Nitrates and nitrites
Correct answer-(d)
48. The correct sequence of parts in human alimentary canal is
(a) Mouth → oesophagus →
stomach → large intestine → small intestine
(b) Mouth → stomach →
oesophagus → small intestine → large
intestine
(c) Mouth → oesophagus →
stomach → small intestine → large intestine
(d) Mouth → stomach →
oesophagus → large intestine → small intestine
Correct answer-(c)
49. The common
process of excretion in unicellular plants and animals is
(a)Diffusion
(b)Osmosis
(c)Imbibition
(d)Plasmolysis
Correct answer-(a)
50. De-oxygenated blood comes to
(a) Left atrium
(b)Right atrium
(c) Left ventricle
(d)Right ventricle
Correct answer-(b)
51. In group of organisms, food is broken down outside the body and
absorbed
(a) mushroom., bread
mould, yeast
(b)Green plants, mushroom, Paramecium
(c) cuscuta, amoeba,
Paramecium
(d)Tapeworm, cuscuta, lice
Correct answer-(a)
52. In mouth cavity, enzyme amylase present in saliva, performs
breaking of
(a) Proteins into amino
acids
(b)Fats into fatty acids
(c) Starch into sugars
(d)Sugars into glucose
Correct answer-(c)
53. From the liver, bile is received in
(a) oesophagus
(b)Stomach
(c) Small intestine
(d)Large intestine
Correct answer-(c)
54. Proteins are changed to simpler molecules in
(a) Stomach
(b)Mouth cavity
(c) Small intestine
(d)Large intestine
Correct answer-(a)
55. Absorption of digested food takes place in
(a)Stomach
(b)Mouth cavity
(c)Small intestine
(d)Large intestine
Correct answer-(c)
56. Water and some salts are absorbed in
(a)Stomach
(b)Mouth cavity
(c)Small intestine
(d)Large intestine
Correct answer-(d)
57. After digestion, proteins change into
(a) Amino acid
(b)Glucose
(c) Fatty acid and
glycerol
(d)All the above
Correct answer-(a)
58. After digestion, fats change into
(a)Amino acid
(b)Glucose
(c)Fatty acid and
glycerol
(d)All the above
Correct answer-(c)
59. After digestion carbohydrates
proteins change into
(a)Amino acid
(b)Glucose
(c)Fatty acid and
glycerol
(d)All the above
Correct answer-(b)
60. In plants respiration take place
(a)Only at night
(b)Only during the day
(c)Both day and night
(d)None of the above
Correct answer-(c)
61. Where air is blown from mouth into a test-tube, containing lime
water, it becomes milky due to the presence of
(a)Oxygen
(b)Water
(c)Carbon dioxide
(d)Enzymes
Correct answer-(c)
62. In aerobic respiration, the product is
(a) Energy
(b)Water
(c)Carbon dioxide
(d)All the above
Correct answer-(d)
63. Backflow of
blood inside the heart during its contraction, is prevented by
(a)Thick muscular walls
of ventricles
(b)valves in heart
(c)Thin walls of atria
(d)all the above
Correct answer-(b)
64. The vertebrates in which heart pumps deoxygenated blood to
different body parts, are
(a) Pieces
(b)Pieces and amphibians
(c)Amphibians
(d)Amphibians and reptiles
Correct answer-(a)
65. In anaerobic respiration, yeast cells produce
(a) Water, carbon dioxide and energy
(b)Water, alcohol, and energy
(c) Carbon dioxide, alcohol, and energy
(d)Lactic acid and energy
Correct answer-(c)
66. After running, an athlete gets cramps in the legs due to the
accumulation of
(a) Alcohol
(b)Lactic acid
(c)Carbon dioxide
(d)Water
Correct answer-(b)
67. The correct pathway of air passage during in halation is
(a) Nasal passage →
trachea → pharynx → layrinx
(b) Nostrils → pharynx →
layrinx → trachea → alveoli
(c) Nostrils → layrinx →
pharynx → trachea → lungs
(d) None of the above
Correct answer-(b)
Class 10 science chapter 6 Life Processes fill in the blanks
Here you are provided with important fill
in the blanks of Class 10 Science
Chapter 6 which are also very useful in the context of new pattern of CBSE
Class Board Exams 2021-22. You can prepare Multiple Choice Questions using
following fill in the blanks yourself.
Life Processes fill in the blanks
1.............................. do not use
enzymes.
2.In............................. respiration
very less energy is obtained.
3. Aerobic respiration is completed in the
presence of.............................
4. In aerobic respiration one molecule of
glucose gives ..................... molecules of ATP.
5............................. cannot
synthesize their food.
6.............................derive their
food from dead and decaying organic matter.
7. Leach is a.............................
8............................. and.............................
are saprophytes.
9. In............................. mode of
nutrition, an organism takes small or big solid particles.
10. In higher animals, ingestion of food is
carried by.............................
11. Absorption of digested food takes place
in............................. in man.
12.............................. is
present in saliva.
13. Digestion process starts in.............................
itself.
14.The enzyme
.............................present in stomach changes protein into peptones.
15. Pancreatic juice acts on food in.............................
16. Enzyme............................. secreted
by the stomach is active in acidic medium.
17. Sunlight, carbon dioxide, water, and.............................
are required for photosynthesis.
18.............................. movement is necessary for life.
19. All the organisms require.............................
to perform different activities.
20. All............................. are autotrophs.
21. Green plants prepare their food by the
process of.............................
22. Man is............................. in
nutrition.
23. Unused glucose is stored in the form of.............................
in plants.
24. Photosynthesis takes place.............................
(name of cell organelle)
25.If a plant is placed in dark for three
days, the leaves will become.............................
26. Starch changes blue in.............................
solution.
27.............................. gas is
evolved in photosynthesis.
28.............................. is
opposite of photosynthesis.
29............................. is the
energy currency for most cellular processes.
30. Aerobic oxidation is performed in.............................
of the cell.
31. Mitochondria is called the.............................
of a cell.
32. In lack of oxygen, pyruvate is changed to.............................
in our muscles.
33. Cuscuta is a.............................
plant.
34.During light reaction the
photosynthetic pigments absorb light energy in the form of.............................
35. In iodine solution.............................
gives blue-black colour.
36. Crotons and money plants have.............................
leaves.
37. Amoeba engulfs the food by producing.............................
38. Grass is a.............................
source of food.
39. Rabbit or deer is a.............................
source of food.
40.Finger-like projections present on the inner
lining of intestine are called................
41. The main outcome of respiration is the
release of.............................
42. All parts of a plant perform.............................
Individually.
43. In plants exchange of gases takes place
through stomata and.............................
44. Gradual softening of tooth enamel and
dentine is called.............................
45. Rate of breathing is much.............................
in aquatic animals than that of terrestrial animals.
46. Balloon like structures at the end of
fine tubes on the inner lining of lungs is called.............................
47. When we flatten the diaphragm, the chest
cavity becomes.............................
48. In lower organisms material is
transported by.............................
49. In diffusion molecules move from
.................. concentration to ............concentration.
50. Diffusion of gases takes place at ..................
rate than liquid and solids.
51. Water and dissolved minerals are
transported through .................. in the plants.
52. Food prepared by leaves in transported
through..................to different parts.
53.Oxygen and carbon dioxide are
transported by .................. of blood.
54................... destroy the harmful
pathogens.
55. Temperature of the body is maintained by
.................. system.
56. Pulmonary artery contains
.................. blood.
57. Pure blood is collected in
.................. atrium.
58.Impure blood collected from different
parts of the body, is brought to .........atrium.
59. Separation of useful substances and
wastes is completed by..................
60. Glomeruli are present in a cup-shaped
structure, known as..................
61. Glomerulus acts a ..................
bag.
62. Loss of water from the surface of
leaves is called..................
63. Transpiration of water molecules from
the cells of leaf creates a..................
64. Transport of food from leaves to other
parts of the plants is known as..................
65. Blood is a .................. tissue.
66.Blood from all the body parts is
collected in..................
67. The graphic recording of..............
Changes during heartbeat, is called electro cardiogram.
68. Lymph is a .................. coloured
fluid containing lymphocyte cells.
69. In unicellular animals
.................. serves as an excretory organ.
70. The
.................. have valves.
71. The unit of filtration is..................
72. An artificial kidney is a device to
remove nitrogenous waste products from the blood through..................
73. Stomata are present at the
.................. side of leaves.
74. Two.................. are present on
both sides of the stomata.
75. Opening and closing of stomata depend
on the intensity of light and loss of..........
you can download MCQ Questions for Class 10 Science Biology Chapter 6
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