Class 11 Biology Chapter 2 MCQ. We covered all the Class 11 Biology Chapter 2 MCQ in this post for free so that you can practice well for the exam.
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Class 11 Biology Chapter 2 MCQ for Students
Identify the organisms that lack a cell wall, can survive without oxygen, and can be pathogenic in some animals and plants.
(A) Fungi
(B) Dinoflagellates
(C) Mycoplasma
(D) Archaebacteria
Option c – Mycoplasma
Prions are responsible for causing which of the following disease in humans?
(A) Cr-Jacob disease
(B) AIDS
(C) Herpes
(D) Bovine spongiform encephalopathy
Option a – Cr-Jacob disease
The plant Triticum aestivum belongs to
(A) Phylum Angiospermae
(B) Order Sapindales
(C) Class Dicotyledonae
(D) Both (A) and (C)
Option a – Phylum Angiospermae
Complete the analogy given below. Man : Hominidae :: Tiger :
(A) Canidae
(B) Carnivora
(C) Panthera
(D) Felidae
Option d – Felidae
……. have collections of living plants for reference.
(A) Museums
(B) Herbariums
(C) Botanical Gardens
(D) All of these
Option c – Botanical Gardens
Dogs and cats belong to the same
(A) Family
(B) Genus
(C) Order
(D) Species
Option c – Order
Identify which of the following statements is TRUE.
(A) Viruses can infect but viroids are noninfectious agents.
(B) Viruses have only RNA whereas viroids have DNA.
(C) Viruses have a protein coat, whereas viroids lack a protein coat.
(D) Potato spindle tuber disease is caused by viruses, whereas mosaic formation in plants occurs due to viroids.
Option c – Viruses have a protein coat, whereas viroids lack a protein coat
Identify the odd one out.
(A) Poales
(B) Felidae
(C) Sapindales
(D) Carnivora
Option b – Felidae
Which of the following is considered a defining property of living organisms?
(A) Increase in mass
(B) Growth
(C) Cellular organization
(D) Reproduction.
Option c – Cellular organization
(A) Order
(B) Genera
(C) Class
(D) Division
Option b – Genera
Housefly belongs to the family
(A) Muscidae
(B) Hominidae
(C) Convolvulaceae
(D) Felidae
Option a – Muscidae
Identify the odd one out.
(A) Homo sapiens – Primata
(B) Musca domestica – Diptera
(C) Mangifera indica – Anacardiaceae
(D) Triticum aestivum – Poales
Option c – Mangifera indica – Anacardiaceae
Consciousness is a defining property of living organisms. Which of the following statements best explains this fact?
(A) All organisms are aware of themselves and are self-conscious.
(B) All organisms respond to environmental cues.
(C) We are unsure if brain-dead organisms are living or not.
(D) This feature can be demonstrated in vitro in cell-free systems.
Option b – All organisms respond to environmental cues.
According to binomial nomenclature, the scientific name of potato is printed as
(A) Solanum tuberosum
(B) Solanum tuberosum
(C) Solanum Tuberosum
(D) Solanum tuberosum
Option b – Solanum tuberosum
Which of the following statement is INCORRECT with respect to Deuteromycetes?
(A) Only the asexual or vegetative phases of these fungi are known.
(B) mycelium is aseptate and coenocytic.
(C) They reproduce only by asexual spores known as conidia.
(D) They are commonly known as imperfect fungi.
Option b – mycelium is aseptate and coenocytic.
Which of the following is INCORRECT regarding heterotrophic bacteria?
(A) Curdling of milk is carried out by these bacteria.
(B) They fix nitrogen in leguminous plant roots.
(C) They are capable of causing diseases like cholera, typhoid, and tetanus.
(D) They belong to the kingdom Protista.
Option d – They belong to the kingdom Protista.
Which of the following is referred to as true bacteria?
(A) Archaebacteria
(B) Chrysophytes
(C) Eubacteria
(D) Euglenoids
Option c – Eubacteria
Complete the following analogy. Trypanosoma: Flagellated Protozoa Paramoecium: ……….
(A) Sporozoa
(B) Ciliated protozoa
(C) Amoeboid protozoa
(D) Slime mould
Option b – Ciliated protozoa
…….. are known as the chief producers in the oceans.
(A) Dinoflagellates
(B) Diatoms
(C) Euglenoids
(D) Slime molds
Option b – Diatoms
The phenomenon of red tides in the ocean occurs due to
(A) diatoms
(B) dinoflagellates
(C) desmids
(D) mycoplasma
Option b – dinoflagellates
The population of fish in a pond is 200 and 100 of them died in a week due to the release of toxicants in the pond. Calculate the death rate of fish.
(A) 20 fish/week
(B) 0.5 fishes/week
(C) 50 fish/week
(D) 5.1 fishes/week
Option b – 0.5 fishes/week
Which of the following statement/s is/are CORRECT? i. Alexander Von Humboldt observed that species richness in a region increases up to a limit with increasing explored area. ii. The rivet popper hypothesis was put forth by David Tilman. iii. Robert May gave a more realistic estimate of the number of global species.
(A) i and iii are correct
(B) i, ii and iii are incorrect
(C) only ii and iii are correct
(D) i, ii and iii are correct
Option a – i and iii are correct
The pyramid of energy is
(A) always upright
(B) always inverted
(C) mostly upright but sometimes inverted
(D) never upright
Option a – always upright
Identify the INCORRECT statement.
(A) In Opuntia, photosynthesis is performed by a flattened stem.
(B) Seals possess blubber below the skin as an adaptation to minimize heat loss.
(C) According to Allen’s rule, mammals found in desert regions have shorter ears and limbs.
(D) Kangaroo rats have the ability to concentrate their urine and minimize water loss.
Option c – According to Allen’s rule, mammals found in desert regions have shorter ears and limbs.
……… is NOT an invasive weed species.
(A) Water hyacinth
(B) Lantana camara
(C) Parthenium
(D) Clarius gariepinus
Option d – Clarius gariepinus
The natural reservoir of sulfur is
(A) seawater
(B) rock
(C) fossil fuels
(D) atmosphere
Option b – rock
In primary succession in water, the small phytoplanktons are replaced with time by
(A) marsh meadow
(B) sedges
(C) rooted submerged plants
(D) grasses
Option c – rooted submerged plants
Complete the analogy with respect to population interactions. Orchid Ophrys : Bees:: Whale: ………..
(A) Calotropis
(B) Cattle egrets
(C) Sea anemone
(D) Barnacles
Option d – Barnacles
Assertion: Sparrow occupies more than one trophic level in an ecosystem. Reason: Sparrow is a primary consumer when it eats fruits, seeds, and peas and a secondary consumer when it eats insects and worms.
(A) Both assertion and reason are true and the reason is the correct explanation of assertion.
(B) Both assertion and reason are true but the reason is not the correct explanation of assertion.
(C) The assertion is true but the reason is false.
(D) Both assertion and reason are false.
Option a – Both assertion and reason are true and the reason is the correct explanation of assertion.
Which of the following includes extinct species?
(A) Dodo, Stellar’s sea cow, Clouded leopard
(B) Great Indian Bustard, Dodo, Quagga
(C) Tasmanian tiger, Stellar’s COW. sea Quagga
(D) Asiatic lion, Great Indian Bustard. Clouded leopard
Option c – Tasmanian tiger, Stellar’s COW. sea Quagga
(A) G.F. Gause
(B) Herbert Boyer
(C) Stanley Cohen
(D) Charles Darwin
Option a – G.F. Gause
The World Summit on sustainable development in Johannesburg, South Africa was held in the year
(A) 1965
(B) 1972
(C) 1992
(D) 2002
Option d – 2002
Read the following statements and select the correct option. Statement I: Fine particulates of size 2.5 micrometers or less in diameter can cause breathing and respiratory symptoms. Statement II: Automobiles with catalytic converters emit large amounts of poisonous gases.
(A) Statement I is correct, and Statement II is incorrect.
(B) Statement I is incorrect, and Statement II is correct.
(C) Both Statements I and II are correct.
(D) Both Statements I and II are incorrect.
Option a – Statement I is correct, and Statement II is incorrect.
If + indicates beneficial interaction and ‘-‘ detrimentation, then identify the INCORRECT match with respect to population interactions and signs assigned to them.
(A) Competition: ‘-‘ and ‘-‘
(B) Mutualism: +’ and ‘+’
(C) Amensalism: ‘+’and ‘-‘
(D) Parasitism: “+’ and ‘-‘
Option c – Amensalism: ‘+’and ‘-‘
Identify the INCORRECT match.
(A) Increased biological oxygen demand – Less polluted water bodies
(B) Algal bloom – Deterioration of water quality and fish mortality
(C) High concentrations of DDT – Decline in bird population due to biomagnification.
(D) Increased level of greenhouse gases – Global warming
Option a – Increased biological oxygen demand – Less polluted water bodies
The phenomenon of the natural aging of a lake by biological enrichment of its water is
(A) biomagnification
(B) eutrophication
(C) bioremediation
(D) biofortification
Option b – eutrophication
The National Forest Policy (1988) of India has recommended ………% forest cover for the plains.
(A) 10
(B) 21
(C) 33
(D) 67
Option c – 33
Polyblend is
(A) fine powder of recycled modified plastic
(B) a mixture of biodegradable wastes and vermicompost
(C) a mixture of non-biodegradable waste and bitumen
(D) fine powder of non-recyclable plastic
Option a – fine powder of recycled modified plastic
Read the following statements and select the correct option. i. Ozone in the lower atmosphere is known as good ozone. ii. Montreal Protocol, an international treaty was signed to control the emission of ozone-depleting substances. iii. The thickness of ozone is measured in the terms of Dobson units. iv. Ozone depletion can cause a decreased amount of UV radiation to reach the Earth.
(A) i and ii are correct
(B) ii and iii are incorrect
(C) iii and iv are correct
(D) i and iv are incorrect
Option d – i and iv are incorrect
IUCN maintains a Red Data Book which contains information about
(A) exotic plant species
(B) endangered plant and animal species
(C) extinct animal species
(D) economically important animal species
Option b – endangered plant and animal species
The most widely used device to remove particulate matter present in the exhaust from a thermal power plant is
(A) lime spray
(B) electrostatic precipitator
(C) smelter
(D) smokestacks
Option b – electrostatic precipitator
This determines structure and function of the organism
1. RNA
2. DDT
3. DNA
4. CNA
Option 3 – DNA
Tetracycline is used for the treatment of
1. Chalera
2. Typhoid
3. TB
4. Plague
Option 4 – Plague
Who produced Tetracycline?
1. Y.Naidamma
2. Y.Subba Rao
3. Pasteur
4. Aristotle
Option 2 – Y.Subba Rao
Who is considered as the “Wizard of the wonder Drugs?”
1. Ronald Ross
2. M.S. Swaminathan
3. Y. Subba Rao
4. H.C. Crick
Option 3 – Y.Subba Rao
The science of birds and their living habits is known as
1. Micro biology
2. Ornithology
3. Cryptalogy
4. Bio technology
Option 4 – Bio technology
Who is responsible for Green revolution in India?
1. Y. Subbar Rao
2. Y. Naidamma
3. M.S. Swaminathan
4. Salim Ali
Option 3 – M.S. Swaminathan
In which area of science did Har Gobind Khorana made significant contributions?
1. Bio Medicine
3. Biometrics
Work is carried out on cell biology at
1. NIN
2. CCMB
3. Both
4. None
Option 2 – CCMB
Work on nutrition is carried out at
1. Indian Agricultural Research Institute
2. National Institute of Nutrition
3. National Institute of Oceanography
4. None of the above
Option 2 – National Institute of Nutrition
Research on medical sciences is carried on at
1. IARI
2. NIN
3. CMR
4. All
Option 3 – CMR
ICRISAT is located at
1. Hyderabad
2. Pune
3. Delhi
4. Jaipur
Option 1 – Hyderabad
NBRI conducts research on
1. Animals
2. Plants
3. Eggs
4. Fishes
Option 2 – Plants
Interaction between biology and chemistry is studied in
1. Bio chemistry
2. Anatomy
3. Pathology
4. Ecalogy
Option 1 – Bio chemistry
Branch of biology that deals with inheritance is
1. Anatomy
2. Genetics
3. Ecology
4. Taxonomy
Option 2 – Genetics
Branch of biology dealing with fossils is
1. Ecology
2. Genetics
3. Palaeontology
4. All the above
Option 3 – Palaeontology
Branch of biology dealing with microorganisms, bacteria, and viruses is
1. Ecology
2. Genetics
3. Anatomy
4. Microbiology
Option 4 – Microbiology
Distribution of animals on earth is studied under
1. Pathology
2. Zoo geography
3. Anatomy
4. All
Option 2 – Zoo geography
Sponges belong to the phylum
1. Chordata
2. Protozoa
3. Porifera
4. Metaphyta
Option 3 – Porifera
Diatoms belong to the phylum
1. Chlorophyta
2. Metaphyta
3. Metazoa
4. Bryophyta
Option 1 – Chlorophyta
Insects belong to the phylum
1. Insecta
2. Arthropoda
3. Annelida
4. Chordata
Option 2 – Arthropoda
Amoebic dysentry is caused by
1. Bacteria
2. Protozoa
3. Virus
4. Fungi
Option 2 – Protozoa
Incubation period of whooping cough
1. 1-10 days
2. 32-64 days
3. 10-16 days
4. 16-33 days
Option 3 – 10-16 days
Which of the following is not a bacterial disease
1. Cholera
2. Mumps
3. Tetanus
4. Typhoid
Option 2 – Mumps
Tetanus is also called
1. Lockjaw
2. Diphtheria
3. Both
4. None
Option 1 – Lockjaw
Cheapest method to purify drinking water is
1. Boiling
2. Chlorination
3. Filtration
4. All
Option 3 – Filtration
Water is contaminated by
1. Bathing
2. Washing clothes
3. Washing cattle
4. All
Option 4 – All
Insectivorous plants grown to control mosquitoes are
1. Drosera
2. Nepenthes
3. Utcicularia
4. All
Option 4 – All
Fishes used in biological control of mosquitoe are
1. Gambusia
2. Labeo
3. Panchay
4. Any one
Option 4 – Any one
Transmission of diseases through animals by
1. Uncooled meat
2. Snails
3. Insects
4. Any one
Option 4 – Any one
Diseases that spreads through direct contact
1. Scabies
2. Polio
3. Cholera
4. Typhoid
Option 1 – Scabies
Amoebiasis spreads through
1. Water
2. Air
3. Animals
4. Direct contact
Option 1 – Water
Files are responsible for the transmission of diseases like
1. Cholera
2. Malaria
3. Filaria
4. Scabies
Option 1 – Cholera
Snails act as vedors for the transmission or helninth parasites called
1. Planoria
2. Blood fluke
3. Liver fluke
4. None
Option 3 – Liver fluke
How many minutes of boiling water is required to kill the disease causing germs
1. 10-15 min.
2. 9 min.
3. 5 min.
4. 7 min.
Option 1 – 10-15 min.
Vaccination was discovered in the year
1. 1786
2. 1756
3. 1776
4. 1886
Option 3 – 1776
The surface of micro organisms contain
1. Plasma
2. Antigens
3. Antibodies
4. Serum
Option 2 – Antigens
The protein released by body against antigens are
1. Antibodies
2. Antigens
3. Plasma
4. Serum
Option 1 – Antibodies
To develop antibodies against a diseases the substance injected is
1. Vaccine
2. Antigen
3. Serum
4. Antibody
Option 1 – Vaccine
Files and cockroaches can be killed by spraying chemicals like
1. Powder
2. DDT
3. Both
4. None
Option 2 – DDT
A vaccination was discovered by
1. Pasteur
2. Fenner
3. Both
4. None
Option 2 – Fenner
Chemicals that kill fungi are called
1. Fungicides
2. Rod enticides
3. Both
4. None
Option 1 – Fungicides
What is used for vaccination
1. Serum
2. Blood
3. Dead microorganisms
4. All
Option 3 – Dead microorganisms
Mosquitoes act as vectors for
1. Malaria
2. Filaria
3. Both
4. None
Option 3 – Both
These cells are useful for natural immunity
1. Digestive cells
2. RBC
3. WBC
4. Kidney cells
Option 3 – WBC
Ethylene dibromide is used for the control of
1. Insects
2. Rats
3. Cats
4. Dogs
Option 1 – Insects
Freshness in vegetables is preserved by
1. Freezing
2. Smoking
3. Fillering
4. Dehydration
Option 1 – Freezing
After pasteurisation, milk is stored at
1. 40°C
2. 30°C
3. 10°C
4. 20°C
Option 3 – 10°C
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