WBBSE Class 10 Life Science Chapter 5 Environment Its Resources And Their Conservation MCQs

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WBBSE Chapter 5 Nitrogen Cycle Multiple Choice Questions

Question 1. The bacteria that bring about ammonification is

  1. Bacillus ramosus
  2. B.thuringiensis
  3. B. subtilis
  4. None of the above

Answer: 1. Bacillus ramosus

Question 2. The bacteria helping in nitrification is

  1. Clostridium sp
  2. Nitrosomonas sp
  3. Nitrobactersp
  4. Pseudomonas

Answer: 2. Nitrosomonas sp

Read and Learn More WBBSE Class 10 Life Science Multiple Choice Questions

Question 3. The absorption of nitrogen in plants occurs in the form of

  1. N03
  2. N2
  3. H2
  4. NH4+

Answer: 1. N03

Question 4. The bacteria that cause denitrification is

  1. Glucanobacter sp
  2. Escherichia sp
  3. Nitrobacter sp
  4. Pseudomonas sp

Answer: 3. Nitrobacter sp

WBBSE Notes For Class 10 Geography And EnvironmentWBBSE Notes For Class 10 History And Environment
WBBSE Solutions For Class 10 Life ScienceWBBSE Class 10 Life Science Multiple Choice Questions
WBBSE Solutions for Class 10 MathsWBBSE Class 10 Maths Multiple Choice Questions
WBBSE Notes For Class 10 Physical Science And Environment

 

Question 5. Which of the plants does not have endophytic cyanobacteria?

  1. Cycas sp
  2. Azolla sp
  3. Anthoceros sp
  4. Gnetum sp

Answer: 3. Anthoceros sp

Environment and Resource Conservation MCQs for Class 10

Question 6. Which one of the greenhouse gases causes the acidification of soil?

  1. Ch4
  2. CFC
  3. N2O
  4. 03

Answer: 3. N2O

WBBSE Class 10 Life Science Chapter 5 MCQs

Question 7. Which process increases nitrogen concentration in the atmosphere?

  1. Ammonification
  2. Nitrification
  3. Nitrogen fixation
  4. Denitrification

Answer: 4. Denitrification

Question 8. Which of the bacteria is a free-living nitrogen fixer?

  1. Escherichia
  2. Clostridium
  3. Rhizobium
  4. Frankia

Answer: 2. Clostridium

Question 9. Which bacteria remains associated with the root valgus?

  1. Rhizobium
  2. Azospirillum
  3. Frankia
  4. Bradyrhizobium

Answer: 2. Azospirillum

Question 10. The key enzyme for nitrogen fixation is

  1. Dinitrogenase
  2. Nitrogenase
  3. Nitrate oxidase
  4. Nitrate reductase

Answer: 2. Nitrogenase

WBBSE Class 10 Life Science Chapter 5 MCQs

WBBSE Class 10 Life Science Chapter 5 MCQs With Answers

Question 11. The elements required for nitrogenase are

  1. Co and mo
  2. Fe and mo
  3. Fe and co
  4. B and mo.

Answer: 2. Fe and mo

Question 12. The chemical process involving the production of NH3 is

  1. Haber-bosch process
  2. Riemer’s process
  3. Helmont’s process
  4. Friedel-craft’s reaction

Answer: 1. Haber-bosch process

Question 13. The following cyanobacteria fix nitrogen

  1. Stigonema
  2. Gleocapsa
  3. Anabaena
  4. None of these

Answer: 3. Anabaena

Question 14. The following fern is used as a biofertilizer in paddy field

  1. Salvinea
  2. Azolla
  3. Marsilea
  4. None of the above

Answer: 2. Azolla

Question 15. The number of ATP molecules required for fixing one molecule of nitrogen is

  1. 6 Atp
  2. 10 Atp
  3. 14 Atp
  4. 16 Atp

Answer: 4. 16 Atp

Question 16. The nodule appears red due to the presence of

  1. Nodulin
  2. Haemoglobin
  3. Ferredoxin
  4. Leg-haemoglobin

Answer: 4. Leg-haemoglobin

WBBSE Class 10 Life Science Chapter 5 MCQs

Question 18. Rhizobium to legume root is

  1. Polysaccharide
  2. Nodulin
  3. Lectin
  4. Protein

Answer: 3. Lectin

Question 19. Leghaemoglobin creates

  1. Anaerobic condition for optimum activity of nitrogenase
  2. Aerobic condition for optimum activity of nitrogenase
  3. Required oxygen concentration for optimum activity of nitrogenase
  4. A suitable environment for nodule formation

Answer: 3. Required oxygen concentration for optimum activity of nitrogenase

Question 20. Arrange the following processes of the N2 cycle in proper sequence: Denitrification, Nitrogen fixation, Ammonification, and Nitrification

  1. (2) — (3)— (4) — (1)
  2. (1) — (2) — (3) — (4)
  3. (1) — (3) — (2) — (4)
  4. (4) —(3) —(2) —(1)

Answer: 1. (2) — (3)— (4) — (1)

Question 21. One of the following is a way by which atmospheric nitrogen is converted to nitrates-

  1. Reduction
  2. Decay
  3. Denitrification
  4. Lightning

Answer: 4. Lightning

Question 22. Rhizobium bacteria and root nodules of a pea plant an examples of

  1. Predation
  2. Symbiosis
  3. Parasitism
  4. Commensalism

Answer: 2. Symbiosis

Question 23. Which of the following phases of the nitrogen cycle Pseudomonas is associated with—

  1. Nitrogen fixation
  2. Nitrification
  3. Denitrification
  4. Ammonification

Answer: 3. Denitrification

Life Science Class 10 Chapter 5 Mcqs With Answers

Question 24. Which one of the folio wing microbes takes part in nitrification—

  1. Nitrosomonas
  2. Azotobacter
  3. Pseudomonas
  4. Thiobacillus

Answer: 1. Nitrosomonas

WBBSE Chapter 5 Environmental Pollution MCQs

Question 25. In almost all metropolitan cities, the major atmospheric pollutant(s) is/are

  1. Oxides of sulfur
  2. CO2 & Co
  3. Suspended particulate matter (SPM)
  4. Oxides of nitrogen

Answer: 3. Suspended particulate matter (SPM)

Question 26. SPM include

  1. Aerosols
  2. Raindrops
  3. Smog
  4. Minute dust particles

Answer: 4. Minute dust particles

Question 27. Which of the following is not a particulate matter?

  1. Hydrocarbon dust
  2. Lead dust
  3. Ozone
  4. Smoke

Answer: 3. Ozone

Question 28. The diameter of the rpm is

  1. SPM10
  2. SPMg
  3. SPMs
  4. SPM2

Answer: 4. SPM2

Question 29. Which one of the following is a secondary pollutant?

  1. O3
  2. Pan
  3. Both
  4. CO2

Answer: 3. Both

Question 30. Which one of the following is not a greenhouse gas?

  1. CO2
  2. Ch4
  3. 03
  4. Co

Answer: 4. Co

Life Science Class 10 Chapter 5 Mcqs With Answers

Question 31. The percentage of air pollution that comes from combustion is

  1. 20-30%
  2. 30-40%
  3. 40-50%
  4. 50 – 60%

Answer: 4. 40-50%

Question 32. Which of the following gases may be used as a coolant?

  1. CCl4
  2. CFC
  3. 03
  4. None

Answer: 2. Cfc

Question 33. Which layer is damaged due to supersonic jets?

  1. O3 layer
  2. CO2 layer
  3. Co layer
  4. None

Answer: 1. O3 layer

Question 34. The following gas causes depletion of 02 from hemoglobin

  1. CO2
  2. Co
  3. Ch4
  4. No

Answer: 2. Co

Question 35. Which are the primary constituents of photochemical smog?

  1. Hydrocarbons and CFCS
  2. CO2 & NO2
  3. NO2 & hydrocarbons
  4. SO2 & Co.

Answer: 3. NO2 & hydrocarbons

Question 36. The greenhouse effect corresponds to

  1. Water pollution
  2. SO2 poisoning
  3. Global warming
  4. Production of green manure

Answer: 3. Global warming

Question 37. Excessive nutrients in the water body are also called

  1. Bio-accumulation
  2. Bio-stimulation
  3. Bio-magnification
  4. Eutrophication

Answer: 4. Eutrophication

Life Science Class 10 Chapter 5 Mcqs With Answers

Question 38. The nitrogen-fixing bacteria only become active

  1. In the presence of phosphorus
  2. In the presence of a high amount of nitrogen
  3. In the absence of nitrogen
  4. In low concentrations of nitrogen

Answer: 3. In the absence of nitrogen

Question 39. The following element is highest in seawater

  1. Cl
  2. F
  3. P
  4. C

Answer: 3. P

Question 40. Radiation may induce

  1. Leukemia
  2. Blood sugar
  3. Heart attack
  4. Osteoporosis

Answer: 1. Leukemia

Question 41. The following metal blocks hemoglobin biosynthesis

  1. Co
  2. Fe
  3. Cu
  4. Pb

Answer: 4. Pb

Question 42. Acid rain may include

  1. Nitrous acid
  2. Nitric acid
  3. Sulphuric acid
  4. All of them

Answer: 4. All of them

Question 44. Exposure to the following radioactive elements causes bone cancer & leukemia

  1. Radium 226
  2. Thorium232
  3. Strontium90
  4. Uranium236

Answer: 3. Strontium90

Life Science Class 10 Chapter 5 Mcqs With Answers

Question 45. The gradual increase of a pollutant along the food chain is also called

  1. Bio-pollution
  2. Bio-enhancement
  3. Bio-remediation
  4. Bio-magnification

Answer: 4. Bio-magnification

Question 46. A pollutant is any substance, chemical, or other factor, that changes

  1. The natural balance of our environment
  2. Natural geochemical cycles
  3. The natural flora of our environment
  4. Natural wildlife of our region

Answer: 1. The natural balance of our environment

Question 47. Which of the following is associated with biological amplification?

  1. S04
  2. Sewage
  3. Ddt
  4. All of these

Answer: 3. Ddt

Question 48. Non-biodegradable organic pollutants include

  1. NPK
  2. DDT
  3. Nitric acid
  4. Polyhydroxy butyrate

Answer: 2. Ddt

Question 49. The threshold of pain in human ears is

  1. 50-60 Db
  2. 30-40 Db
  3. 160-180 Db
  4. 120-140 Db

Answer: 4. 120-140 Db

Class 10 Life Science Multiple Choice Questions

Question 50. The component of living cells affected by the pollutant SO2 is

  1. All cell membrane system
  2. Nucleus
  3. Cell wall
  4. Mitochondria

Answer: 1. All cell membrane system

Question 51. The following organism produces biodegradable plastic

  1. Algae
  2. Fungi
  3. Bacteria
  4. Virus

Answer: 3. Bacteria

Question 52. The pollutant responsible for the luxuriant growth of algae which forms water bloom is

  1. Phosphates
  2. DDT
  3. H2s
  4. Sulfates

Answer: 1. Phosphates

Question 53. The highest ddt deposition shall occur in

  1. Phytoplanktons
  2. Seagull
  3. Crabs
  4. Eels

Answer: 2. Seagull

Question 54. Drained sewage has a bod

  1. More than that of clear water
  2. Less than that of clear water
  3. Equal to that of clear water
  4. None of these

Answer: 1. More than that of clear water

Question 55. Who among the following are nature’s water cleaners?

  1. Producers
  2. Consumers
  3. Symbionts
  4. Decomposers & scavangers

Answer: 4. Decomposers & scavengers

WBBSE Chapter 5 Environment And Human Population MCQs

Question 56. Population is

  1. Individuals in a family
  2. Species in a community
  3. Individuals in a species
  4. Communities in an ecosystem

Answer: 1. Individuals in a species

Question 57. The rate of adding new ones produced in a specific period is termed as

  1. Mortality
  2. Popularity
  3. Fatality
  4. Natality

Answer: 4. Natality

Class 10 Life Science Multiple Choice Questions

Question 58. Resources are of two types- renewable resources and non-renewable resources.

  1. Human
  2. Economic
  3. Geological
  4. Natural

Answer: 4. Natural

Question 59. Is the destruction or clearing of forested lands, usually to expand agricultural land or for timber harvesting.

  1. Forestation
  2. Deforestation
  3. Agriculture
  4. Silting

Answer: 2. Deforestation

Question 60. Shrinking fields is one of the biggest challenges for making food available to the world population.

  1. Agricultural
  2. Wheat
  3. Paddy
  4. Both ‘2’ and ‘3’ correct

Answer: 1. Agricultural

Question 61. The human carrying capacity of the earth is between

  1. 6 To 7 billion
  2. 7 To 8 billion
  3. 8 To 9 billion
  4. 9 To 10 billion

Answer: 4. 9 To 10 billion

Question 62. Pollution has been linked to health problems like asthma and lung disease.

  1. Air
  2. Water
  3. Noise
  4. Thermal

Answer: 1. Air

Question 63. Zero population growth is characterized by

  1. No growth in population recorded in the last decade
  2. The very slow rate of growth of the population
  3. Constant rate of growth of population
  4. Stationary growth of population in one calendar year

Answer: 1. No growth in population recorded in the last decade

Class 10 Life Science Multiple Choice Questions

Question 64. Problem(s) due to ever-increasing population is/are

  1. Depletion of natural resources
  2. Deforestation
  3. Increased pollution
  4. All of these

Answer: 4. All of these

Question 65. Wetlands act as the biological of the landscape

  1. Lungs
  2. Liver
  3. Heart
  4. Kidneys

Answer: 4. Kidneys

Question 66. Lower rates, along with better management of land and water resources, are necessary to avert chronic food shortages.

  1. Death
  2. Birth
  3. Growth
  4. Respiration

Answer: 2. Birth

Question 67. Produce an exaggerated response of the immune system in which a specific antibody initiates the inflammatory response.

  1. Mutagens
  2. Nitrogen
  3. Allergens
  4. Hydrogen

Answer: 3. Allergens

Question 68. Bronchitis is a disease in which the mucus membrane in the lung’s bronchial passages becomes inflamed.

  1. Circulatory
  2. Respiratory
  3. Excretory
  4. Fungal

Answer: 2. Respiratory

Question 69. Is an uncontrolled growth of cells that disrupts body tissues and organs.

  1. Tumor
  2. Cancer
  3. Apoptosis
  4. Leukemia

Answer: 2. Cancer

Question 70. Experts agree that is the single biggest avoidable cause of cancer in the world.

  1. Tobacco
  2. Salt
  3. Sugar
  4. Radiation

Answer: 1. Tobacco

Class 10 Life Science Multiple Choice Questions

Question 71. The declining phase of a population is defined by

  1. Mortality > natality
  2. Natality > mortality
  3. Mortality = natality
  4. Natality = mortality = 0

Answer: 1. Mortality > natality

Question 72. An example of an indoor allergen is

  1. Pollen
  2. Dust mites
  3. Stone dust
  4. Smoke

Answer: 2. Dust mites

Question 73. Factor(s) responsible for bronchitis is/are

  1. Smoking
  2. Air pollution
  3. Occupational irritants
  4. All of these

Answer: 4. All of these

Question 74. An example of a disease caused due to air pollution is

  1. Jaundice
  2. Typhoid
  3. Asthma
  4. Amoebiasis

Answer: 3. Asthma

Question 75. A common symptom of asthma is

  1. Fever
  2. Breathing difficulty
  3. Burning sensation
  4. Loss of appetite

Answer: 2. Breathing difficulty

Life Science Chapter 5 Class 10 Mcq Solutions

Question 76. If the number of pollen grains, fungal spores, and dust particles increase suddenly in the air, decide which of the following problems may increase-

  1. Tuberculosis
  2. Asthma
  3. Malaria
  4. Dengu

Answer: 2. Asthma

WBBSE Chapter 5 Topic D Biodiversity And Conservation MCQs

Question 77. Biodiversity describes the diversity of

  1. Plants
  2. Animals
  3. Life
  4. Wildlife

Answer: 3. Life

Question 78. Is a unit of the biosphere.

  1. Ecosystem
  2. Species
  3. Biodiversity
  4. Ecology

Answer: 1. Ecosystem

Question 79. The worst dangerous threat to wildlife is by

  1. Hunting
  2. Habitat destruction
  3. Overgrazing
  4. Exotic species

Answer: 2. Habitat destruction

Question 80. The Equatorial region of the earth is rich in

  1. Megadiversity
  2. Biodiversity
  3. Minerals
  4. Rainfall

Answer: 2. Biodiversity

Life Science Chapter 5 Class 10 Mcq Solutions

Question 81. Sexual reproduction plays an important role in diversity.

  1. Bio
  2. Eco
  3. Genetic
  4. Mega

Answer: 3. Genetic

Question 82. A buffer zone of the biosphere reserve is where

  1. Wild animals are absent here
  2. No human activity is allowed
  3. Several human activities freely occur
  4. Limited human activity is permitted

Answer: 4. Limited human activity is permitted

Question 83. The gums and adhesives are produced from the tree

  1. Acacia
  2. Arabia
  3. Ficus
  4. Hibiscus

Answer: 1. Acacia

Question 84. Resins are a useful product of gymnospermous wood like

  1. Fern
  2. Rose
  3. Pinus
  4. Timber

Answer: 3. Pinus

Question 85. Apis indica produces

  1. Honey
  2. Wax
  3. Alcohol
  4. Both ‘1’ and ‘2’ correct

Answer: 4. Both ‘1’ and ‘2’ correct

Question 86. The incorrect match for tiger reserve amongst the following is

  1. Buxa – West Bengal
  2. Bandipur – Karnataka
  3. Kanha – Madhya Pradesh
  4. Palamau – Tamilnadu

Answer: 4. Palamau – tamilnadu

Question 87. Pearls are produced by

  1. Sea
  2. Oysters
  3. Instruments
  4. Marine animals

Answer: 2. Oysters

Life Science Chapter 5 Class 10 Mcq Solutions

Question 88. Globally, the number of biodiversity hotspots are

  1. 4
  2. 24
  3. 35
  4. 44

Answer: 3. 35

Question 89. In India, rhinoceros is found in the biodiversity hotspot of

  1. Eastern Himalayas
  2. Western ghats
  3. Indo-Burma
  4. Sundaland

Answer: 1. Eastern Himalayas

Question 90. Which is not a reason for the loss of biodiversity?

  1. Over-exploitation
  2. Over-eating
  3. Pollution
  4. Introduction of exotic species

Answer: 2. Over-eating

Question 91. Which is the first national park established in India?

  1. Bandipur
  2. Periyar
  3. Kanha
  4. Corbett

Answer: 4. Corbett

Question 92. Is considered a a world heritage site by UNESCO.

  1. Kolkata
  2. Delhi
  3. Sundarbans
  4. Himalayas

Answer: 3. Sundarbans

WBBSE Class 10 Life Science Chapter 5 MCQs

Question 93. The diversity of organisms sharing the same community or habitat is called

  1. Alpha diversity
  2. Beta diversity
  3. Gamma diversity
  4. None of these

Answer: 1. Alpha diversity

Question 94. Ex-situ conservation may be done in

  1. Gene bank
  2. National park
  3. Zoo gardens
  4. Sanctuary

Answer: 3. Zoo gardens

Question 95. The joint forest management system originated in

  1. West Bengal
  2. Bihar
  3. Uttar Pradesh
  4. Sikkim

Answer: 1. West Bengal

Question 96. Tiger conservation initiative in India was started in

  1. 1743
  2. 1973
  3. 2005
  4. 1947

Answer: 2. 1973

Question 97. In India, the red panda is found in

  1. Bihar
  2. Kerala
  3. Karnataka
  4. Sikkim

Answer: 4. Sikkim

Question 98. In India, lions are conserved in

  1. Sundarban
  2. Manas
  3. Nandankanan
  4. Gir forest

Answer: 4. Gir forest

Question 99. The first biosphere reserve established in India for conserving the gene pool of flora and fauna and the lifestyle of tribals is

  1. Nilgiri biosphere reserve
  2. Nanda Devi Biosphere Reserve
  3. Thar biosphere reserve
  4. Great Nicobar Biosphere reserve

Answer: 1. Nilgiri Biosphere reserve

WBBSE Class 10 Life Science Chapter 5 MCQs

Question 100. The ex-situ conservation of biodiversity is done through

  1. National park
  2. Biosphere reserve
  3. Cryopreservation of gametes
  4. Wildlife sanctuary

Answer: 3. Cryopreservation of gametes

Question 101. Environmental problems affecting the Sunderban ecosystem is/are due to

  1. Pollution
  2. Fresh water crisis
  3. Urbanization
  4. All of these

Answer: 4. All of these

Objective Type Questions MCQs

Question 102. One endangered species of the Eastern Himalayan biodiversity hotspot is

  1. Lion-tailed macaque
  2. Orangutan
  3. Red Panda
  4. Nilgiri tahr

Answer: 3. Red Panda

Question 103. An example of ex-situ conservation is

  1. Sunderban Tiger Reserve
  2. Corbet National Park
  3. Nilgiri Biosphere Reserve
  4. Cryopreservation

Answer: 4. Cryopreservation

Question 104. Gorumara, Corbett, Kulik, Nandadevi— choose the correct sequence from the following which is correct for the above forests in sequence

  1. Biosphere Reserve, Sanctuary, National Park, National Park
  2. National Park, National Park, Biosphere Reserve, Sanctuary
  3. National Park, National Park, Sanctuary, Biosphere Reserve
  4. Sanctuary, Biosphere Reserve, National Park, Sanctuary

Answer: 3. National Park, National Park, Sanctuary, Biosphere Reserve

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