RBSE Class 10 Science Chemistry Chapter 5 Life Processes MCQs (Objectives) are very important for students preparing for Board Exams. These MCQS have been prepared on the basis of important topics of Life Processes.
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In this post, you will find high- quality,
exam oriented MCQs with answers prepared according to the latest RBSE Class 10
Science syllabus.
Whether you are a student looking for
quick revision or a teacher searching for readymade study material, this post
is for you.
Life Processes Objectives with Answers
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
(dStomach 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
(bNADP
(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)
68. What can accumulate in muscle cells if they respire
anaerobically?
(a) Lactose
(b)Lactic acid
(c)Ethyl alcohol
(d)Carbon do oxide
Correct answer- (b)
69.Which of the following is not produced during anaerobic
respiration in yeast?
(a) H2O
(b)CO2
(c)C2H5OH
(d) ATP
Correct answer- (a)
70. Respiratory gases ae exchanged in a woody stem of plants
through
(a)Stomata
(b) Lenticles
(c)Stem hairs
(d) Body surface
Correct answer- (b)
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