CBSE Class 11 Biology HOTs Biological Classification

Objective Questions for NCERT Class 11 Biology Biological Classification

Question : Red tides are caused by
(a) Red algae
(b) Brown algae
(c) Golden algae
(d) Fire algae
Answer : A

Question : Acellular slime mould:
(a) Physarum
(b) Physarella
(c) Both of these
(d) None of these
Answer : A

Question : Primitive relatives of animals:
(a) Protozoans
(b) Bacteria
(c) Algae
(d) Humans
Answer : A

Question : Amoeba is found in:
(a) Fresh water
(b) Marine water
(c) Dirty water
(d) All of these
Answer : D

Question : Passive food ingestion in Amoeba is known as
(a) Import
(b) Invagination
(c) Circumfluence
(d) Circumvallation
Answer : A

Question : Slime mould is characterized by the presence of
(a) Elaters
(b) Pseudoelaters
(c) Capillitum
(d) Capitulum
Answer : C

Question : When a fresh water protozoan, possessing a contractile vacuole is placed in a glass containing marine water, the vacuole will?
(a) Disappear
(b) Increase in number
(c) Increase in size
(d) Decrease in size
Answer : D

Question : Longitudinal binary fission found in
(a) Euglena
(b) Plasmodium
(c) Planaria
(d) Paramecium
Answer : A

Question : Nutrition in Amoeba is:
(a) Holophytic
(b) Holozoic
(c) Parasitic
(d) Saprobic
Answer : B

Question : Amoeba secretes digestive enzymes for hydrolysing:
(a) Protein
(b) Starch
(c) Fat
(d) All the above
Answer : D

Question : Protists obtain food as:
(a) Holotrophs
(b) Photosynthesisers
(c) Chemosynthesisers
(d) Photosynthesisers, symbionts and holotrophs
Answer : D

Question : Multiple fission in Plasmodium is:
(a) Schizogony
(b) Sproulation
(c) Gamogamy
(d) None of the above
Answer : D

Question : Entamoeba histolytica excretes through:
(a) Food vacuole
(b) Contractile vacuole
(c) General surface
(d) Malpighian tubules
Answer : B

Question : Infective stage of Entamoeba histolytica is:
(a) Pre-cyst
(b) Tetranucleate cyst
(c) Uninucleate cyst
(d) Trophozoite
Answer : B

Question : Seeding ponds with Gambusia fish is an example of:
(a) Parasitism
(b) Biocontrol
(c) Hyperparasitism
(d) Both (a) and (b)
Answer : B

Question : Haemozoin formed in malaria is produced by:
(a) Globin part of haemoglobin
(b) Dead leucocytes
(c) Cryptozoites
(d) Heme of haemoglobin
Answer : D

Question : Spraying kerosene on stagnant water shall kill Anopheles due to:
(a) Burning of body wall
(b) Prevention of spiracle to come in contact with air
(c) Diffusion into body
(d) Entry into and blocking of respiratory tract
Answer : D

Question : What is not connected with reproduction of protozoans?
(a) Cryptogamy
(b) Autogamy
(c) Schizogamy
(d) Conjugation
Answer : C

Question : Certain stages of Plasmodium vivax may survive for a long time in liver of man in dormant state. On reactivation they enter into cycle, this stage is known as:
(a) Exoerythocytic schizogony
(b) Cycle of Ross
(c) Gametogony
(d) Erythrocytic schizogony
Answer : D

Question : Malarial parasite is:
(a) Polygenetic
(b) Monogenetic
(c) Digenetic
(d) Monomorphic
Answer : C

Question : A protein rich layer which makes the body of Euglenoids flexible is called
(a) Pellicle
(b) Murein
(c) Cellulose plate
(d) Pseudopodia
Answer : A

Question : Leishmania tropica produces:
(a) Oriental sores
(b) Kala-azar
(c) Dysentery
(d) Sleeping sickness
Answer : A

Question : Trypanosoma brucei produces:
(a) A disease of animals
(b) Kala-azar
(c) Dysentery
(d) Sleeping sickness
Answer : A

Question : During unfavourable conditions, the plasmodium differentiates to form fruiting bodies bearing spores at their tips. This group is
(a) Chrysophytes
(b) Dinoflagellates
(c) Slime moulds
(d) Protozoans
Answer : C

Question : Trichonympha is a symbiont in alimentary canal of:
(a) Termite
(b) Snails
(c) Hermit Crab
(d) Earthworm
Answer : A

Question : The members of which of the following are litter decomposers?
(a) Deuteromycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Phycomycetes
Answer : A

Question : Quinine is got from bark of:
(a) Cinchona officinalis
(b) Ferula asafoetida
(c) Curcuma domestica
(d) Atropa belladona
Answer : A

Question : Match The following:
(a) Leishmania donovani         1. Malaria
(b) Wuchereria bancrofti          2. Amoebiasis
(c) Trypanosoma gambiense   3. Kalaazar
(d) Entamoeba histolytica       4. Sleeping sickness
                                                 5. Filariasis
(a) A-3 B-4 C-5 D-1
(b) A-3 B-5 C-2 D-1
(c) A-4 B-3 C-2 D-1
(d) A-3 B-5 C-4 D-2
Answer : D

Question : From which of the following most of the antibiotics are prepared?
(a) Fungi
(b) Plants
(c) Actinomycetes
(d) Archaebacteria
Answer : A

Question : Saprolegnea belongs to:
(a) Phycomycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Deuteromycetes
Answer : A

Question : White lust of crucifer is caused by:
(a) Albugo candida
(b) Alterneria solani
(c) Rhizopus
(d) Mucor
Answer : A

Question : Truffels are the member of class:
(a) Basidiomycetes
(b) Ascomycetes
(c) Deuteromycetes
(d) Phycomycetes
Answer : B

Question : Primary host of Puccinia fungi:
(a) Wheat
(b) Barley
(c) Rye
(d) Musturd
Answer : A

Question : Drosophila of the plant kingdom is:
(a) Alternaria
(b) Aspergillus
(c) Neurospora
(d) Albugo
Answer : C

Question : Ergot of rye is caused by:
(a) Claviceps
(b) Phytophthora
(c) Puccinia
(d) Ustilago
Answer : A

Question : Coenocytic hyphae is found in:
(a) Rhizopus
(b) Mucor
(c) Saprolignia
(d) All of the above
Answer : D

Question : Dolipore septum is the characteristics of:
(a) Myxomycetes
(b) Basidiomycetes
(c) Ascomycetes
(d) Phycomycetes
Answer : A

Question : Which of the following is irrelavent to the kingdom Plantae?
(a) Spirogyra
(b) Rhizopus
(c) Funaria
(d) Cycas
Answer : B

Question : Considering two-kingdom classification system, the organisms that are included in kingdom Plantae are
(a) Volvox, Amoeba and Paramecium
(b) Golgi bodies, algae and fungi
(c) Amoeba, bacteria and fungi
(d) Fungi, bacteria and algae
Answer : D

Question : According to two-kingdom classification, the kingdom Plantae consists of
(a) Autotrophs
(b) Heterotrophs
(c) Mesotrophs
(d) Chemotrophs
Answer : A

Question : Cell wall of kingdom Plantae organisms is made up of
(a) Chitin
(b) Cellulose
(c) Polysaccharides
(d) Lipids
Answer : B

Question : Kingdom Animalia is characterized by
(a) Unicellular, prokaryotic and autotrophic
(b) Multicellular, eukaryotic and heterotrophic
(c) Multicellular, prokaryotic and saprophytic
(d) Unicellular, eukaryotic and heterotrophic
Answer : B

Question : Which of the following is true for Kingdom Animalia?
(a) Cell wall are present in animal cell.
(b) Their mode of nutrition is holozoi(c)
(c) They do not follow a definite growth pattern.
(d) All of them are capable of locomotion.
Answer : B

Question : In plants, mosaic formation, leaf rolling and curling, yellowing of plant parts, vein clearing, dwarfing and stunted growth, necrosis, et(c), are the symptoms of
(a) Bacterial diseases
(b) Mycoplasmal diseases
(c) Viral diseases
(d) Fungal diseases
Answer : C

Question : Virion is
(a) Nucleic acid of virus
(b) Antiviral agent
(c) Protein of virus
(d) Completely assembled virus outside host
Answer : D

Question : Virus could be crystallized and crystals consist largely of proteins. This was shown by
(a) W. M. Stanley
(b) M. W. Stanley
(c) W. M. John
(d) None of these
Answer : A

Question : Viruses are
(a) Obligative parasite
(b) Facultative
(c) Either facultative or obligative
(d) None of these
Answer : A

Question : Those viruses infect plants have which type of genetic material?
(a) Single stranded DNA
(b) Single stranded RNA
(c) Double stranded RNA
(d) Double stranded DNA
Answer : B

Question : Viruses that infect animals have which type of genetic material?
(a) Either single or double stranded RNA
(b) Either single/double stranded RNA or double stranded DN(a)
(c) Single stranded DNA
(d) None of these
Answer : B

Question : Genetic material of bacteriophage
(a) Double stranded DNA
(b) Single stranded RNA
(c) Double stranded RNA
(d) Single stranded DNA
Answer : A

Question : Five kingdom system of classification suggested by R.H. Whittaker is not based on
(a) presence or absence of a well defined nucleus
(b) mode of reproduction
(c) mode of nutrition
(d) complexity of body organisation.
Answer : B 

Question : Maximum nutritional diversity is found in the group
(a) fungi         
(b) animalia
(c) monera     
(d) plantae.
Answer : C 

Question : In the five kingdom classification, Chlamydomonas and Chlorella have been included in
(a) protista   
(b) algae
(c) plantae   
(d) monera. 
Answer : A 

Question : In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five kingdom system of classification is used ?
(a) Plantae     
(b) Fungi
(c) Protista     
(d) Monera 
Answer : D 

Question : In five kingdom system, the main basis of classification is
(a) structure of nucleus   
(b) mode of nutrition
(c) structure of cell wall   
(d) asexual reproduction.
Answer : B 

Question : In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria?
(a) Plantae     
(b) Protista
(c) Monera     
(d) Fungi 
Answer : C 

Question : BGA (blue green algae) are included in which of the following groups?
(a) Bryophytes   
(b) Prokaryotes
(c) Protista         
(d) Fungi (1996)
Answer : B 

Question : An important criterion for modern day classification is
(a) resemblances in morphology
(b) anatomical and physiological traits
(c) breeding habits
(d) presence or absence of notochord. 
Answer : B 

Question : Match the organisms in column-I with habitats in column-II.
Column-I                       Column-II
A. Halophiles                (i) Hot springs
B. Thermoacidophiles    (ii) Aquatic environment
C. Methanogens           (iii) Guts of ruminants
D. Cyanobacteria          (iv) Salty area
Select the correct answer from the options given below.
(a) A-(iv), B-(i), C-(iii), D-(ii)
(b) A-(i), B-(ii), C-(iii), D-(iv)
(c) A-(iii), B-(iv), C-(ii), D-(i)
(d) A-(ii), B-(iv), C-(iii), D-(i) 
Answer : A 

Question : Which of the following are found in extreme saline conditions?
(a) Eubacteria         
(b) Cyanobacteria
(c) Mycobacteria     
(d) Archaebacteria
Answer : D

Question : Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
(a) Pseudomonas     
(b) Mycoplasma
(c) Nostoc               
(d) Bacillus 
Answer : B 

Question : Which of the following components provides sticky character to the bacterial cell?
(a) Nuclear membrane     
(b) Plasma membrane
(c) Glycocalyx                 
(d) Cell wall 
Answer : C 

Question : DNA replication in bacteria occurs
(a) within nucleolus
(b) prior to fission
(c) just before transcription
(d) during S phase. 
Answer : B 

Question : Methanogens belong to
(a) eubacteria         
(b) archaebacteria
(c) dinoflagellates   
(d) slime moulds.
Answer : B 

Question : The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the
(a) methanogens     
(b) eubacteria
(c) halophiles         
(d) thermoacidophiles.
Answer : A 

Question : Archaebacteria differ from eubacteria in
(a) cell membrane structure
(b) mode of nutrition
(c) cell shape
(d) mode of reproduction. 
Answer : A 

Question : Which of the following are likely to be present in deep sea water?
(a) Blue-green algae       
(b) Saprophytic fungi
(c) Archaebacteria         
(d) Eubacteria
Answer : C 

Question : Pigment containing membranous extensions in some cyanobacteria are
(a) pneumatophores     
(b) chromatophores
(c) heterocysts             
(d) basal bodies. 
Answer : B 

Question : The cyanobacteria are also referred to as
(a) protists             
(b) golden algae
(c) slime moulds     
(d) blue green algae.
Answer : D 

Question : The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
(a) cyanobacteria
(b) archaebacteria
(c) chemosynthetic autotrophs
(d) heterotrophic bacteria. 
Answer : D 

Question : In eubacteria, a cellular component that resembles eukaryotic cell is
(a) plasma membrane
(b) nucleus
(c) ribosomes
(d) cell wall. 
Answer : A 

Question : Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups
(a) eubacteria and archaea
(b) cyanobacteria and diatoms
(c) protists and mosses
(d) liverworts and yeasts. 
Answer : A 

Question : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.
(i) Methanogens are archaebacteria which produce methane in marshy areas.
(ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
(iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
(iv) Mycoplasma lack a cell wall and can survive without oxygen.
The correct statements are
(a) (ii) and (iii)             
(b) (i),(ii) and (iii)
(c) (ii), (iii) and (iv)     
(d) (i), (ii) and (iv).
Answer : D

Question : Five kingdom system of classification suggested by R.H. Whittaker is not based on
(a) presence or absence of a well defined nucleus
(b) mode of reproduction
(c) mode of nutrition
(d) complexity of body organisation.
Answer : B 

Question : Maximum nutritional diversity is found in the group
(a) fungi
(b) animalia
(c) monera
(d) plantae.
Answer : C 

Question : In the five kingdom classification, Chlamydomonas and Chlorella have been included in
(a) protista
(b) algae
(c) plantae
(d) monera. 
Answer : A 

Question : In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five kingdom system of classification is used ?
(a) Plantae
(b) Fungi
(c) Protista
(d) Monera 
Answer : D 

Question : In five kingdom system, the main basis of classification is
(a) structure of nucleus
(b) mode of nutrition
(c) structure of cell wall
(d) asexual reproduction.
Answer : B 

Question : In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria?
(a) Plantae
(b) Protista
(c) Monera
(d) Fungi 
Answer : C 

Question : BGA (blue green algae) are included in which of the following groups?
(a) Bryophytes
(b) Prokaryotes
(c) Protista
(d) Fungi (1996)
Answer : B 

Question : An important criterion for modern day classification is
(a) resemblances in morphology
(b) anatomical and physiological traits
(c) breeding habits
(d) presence or absence of notochord. 
Answer : B 

Question : Match the organisms in column-I with habitats in column-II.
Column-I Column-II
A. Halophiles (i) Hot springs
B. Thermoacidophiles (ii) Aquatic environment
C. Methanogens (iii) Guts of ruminants
D. Cyanobacteria (iv) Salty area
Select the correct answer from the options given below.
(a) A-(iv), B-(i), C-(iii), D-(ii)
(b) A-(i), B-(ii), C-(iii), D-(iv)
(c) A-(iii), B-(iv), C-(ii), D-(i)
(d) A-(ii), B-(iv), C-(iii), D-(i) 
Answer : A 

Question : Which of the following are found in extreme saline conditions?
(a) Eubacteria
(b) Cyanobacteria
(c) Mycobacteria
(d) Archaebacteria
Answer : D

Question : Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
(a) Pseudomonas
(b) Mycoplasma
(c) Nostoc
(d) Bacillus 
Answer : B 

Question : Which of the following components provides sticky character to the bacterial cell?
(a) Nuclear membrane
(b) Plasma membrane
(c) Glycocalyx
(d) Cell wall 
Answer : C 

Question : DNA replication in bacteria occurs
(a) within nucleolus
(b) prior to fission
(c) just before transcription
(d) during S phase. 
Answer : B 

Question : Methanogens belong to
(a) eubacteria
(b) archaebacteria
(c) dinoflagellates
(d) slime moulds.
Answer : B 

Question : The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the
(a) methanogens
(b) eubacteria
(c) halophiles
(d) thermoacidophiles.
Answer : A 

Question : Archaebacteria differ from eubacteria in
(a) cell membrane structure
(b) mode of nutrition
(c) cell shape
(d) mode of reproduction. 
Answer : A 

Question : Which of the following are likely to be present in deep sea water?
(a) Blue-green algae
(b) Saprophytic fungi
(c) Archaebacteria
(d) Eubacteria
Answer : C 

Question : Pigment containing membranous extensions in some cyanobacteria are
(a) pneumatophores
(b) chromatophores
(c) heterocysts
(d) basal bodies. 
Answer : B 

Question : The cyanobacteria are also referred to as
(a) protists
(b) golden algae
(c) slime moulds
(d) blue green algae.
Answer : D 

Question : The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
(a) cyanobacteria
(b) archaebacteria
(c) chemosynthetic autotrophs
(d) heterotrophic bacteria. 
Answer : D 

Question : In eubacteria, a cellular component that resembles eukaryotic cell is
(a) plasma membrane
(b) nucleus
(c) ribosomes
(d) cell wall. 
Answer : A 
 

Question : Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups
(a) eubacteria and archaea
(b) cyanobacteria and diatoms
(c) protists and mosses
(d) liverworts and yeasts. 
Answer​​​​ : A

Question : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.
(i) Methanogens are archaebacteria which produce methane in marshy areas.
(ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
(iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
(iv) Mycoplasma lack a cell wall and can survive without oxygen.
The correct statements are
(a) (ii) and (iii)
(b) (i),(ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i), (ii) and (iv).
Answer : D

Question : The causal organism for African sleeping sickness is-
(a) Entamoeba histolytica
(b) Giardia
(c) Leishmania
(d) T. gambiense
Answer : D

Question : Lichens indicate SO₂ pollution because they
(a) show association between algae and fungi
(b) grow faster than others
(c) are sensitive to SO₂
(d) flourish in SO₂ rich environment
Answer : C

Question : Which nucleus is vegetative in nature in paramecium?
(a) micronucleus
(b) macronucleus
(c) both micronucleus
(d) none of these
Answer : B

Question : Escherichia coli is used extensively in biological research as it is-
(a) easily cultured
(b) easily available
(c) easy to handle
(d) easily multiplied in host
Answer : A

Question : Non-photosynthetic, aerobic nitrogen fixing soil bacterium is-
(a) Rhizobium
(b) Clostridium
(c) Azotobacter
(d) Klebsiella
Answer : A

Question : Mycorrhiza exhibits the phenomenon of
(a) parasitism
(b) symbiosis
(c) antagonism
(d) endemism
Answer : B

Question : Columella is a specialized structure found in the sporangium of
(a) Spirogyra
(b) Ulothrix
(c) Rhizopus
(d) None of these
Answer : C

Question : The site of respiration in bacteria is-
(a) ribosome
(b) microsome
(c) episome
(d) mesosome
Answer : D

Question : Viruses possess
(a) ribosomes to synthesize protein
(b) organelle for its vital mechanism
(c) either DNA or RNA
(d) none of these
Answer : C

Question : An important criterion for modern day classification is-
(a) resemblances in morphology
(b) anatomical and physiological traits
(c) breeding habits
(d) presence or absence of notochord
Answer : B

Questions:

Question : Polluted water bodies have usually very high abundance of plants like Nostoc and Oscillatoria. Give reasons. 
Answer : They are chemoautotrophs which oxidise nitrates, nitrites and NH₃

Question : Suppose you accidently find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features: Unicellular, well defined nucleus, biflagellate- one flagella lying longitudinally and the other transversely. What would you identify it as ? To which kingdom does it belong? 
Answer : Dinoflagellates. They belong to the kingdom Protista.

Question : Biological classification is a dynamic and ever evolving phenomenon which keeps changing with our understanding of life forms. Justify the statement taking any two examples. 
Ex.1- Two kingdom classification was developed but it was found inadequate later.
Ex. 2. R H Whittaker proposed 5 kingdom classification based on cell structure, thallus organization, nutritional modes, reproduction as well as the phylogeny.
Answer : The phylogenetic system of classification is dynamic because its sources are fossil records of organisms.