MCQ Questions Chapter 2 Biological Classification Class 11 Biology

MCQ Class 11

Please refer to MCQ Questions Chapter 2 Biological Classification Class 11 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Biology issued for the current academic year. We have provided MCQ Questions for Class 11 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 2 Biological Classification in Class 11 Biology provided below to get more marks in exams.

Chapter 2 Biological Classification MCQ Questions

Please refer to the following Chapter 2 Biological Classification MCQ Questions Class 11 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 2 Biological Classification Class 11 Biology

Question- T. O. Diener discovered a new infectious agent that was smaller than viruses and have the following characteristics.
(i) It causes potato spindle tuber disease.
(ii) It has free RNA.
(iii) Molecular weight of RNA is low.
Identify the infections agent.
(a) Viruses
(b) Viroids
(c) Virion
(d) Mycoplasma

Answer

B

Question- Protists are
(a) single-celled eukaryotes.
(b) multicellular eukaryotes.
(c) single-celled prokaryotes.
(d) single-celled akaryote.

Answer

A

Question- Dikaryon formation is the characteristic feature of
(a) ascomycetes and basidiomycetes.
(b) phycomycetes and basidiomycetes.
(c) ascomycetes and phycomycetes.
(d) phycomycetes and zygomycetes.

Answer

A

Question- Select the correct match from the given option.
(a) Occurrence of dikaryotic stage – ascomycetes and basidiomycetes.
(b) Saprophytes – They are autotrophic and absorb soluble organic matter from dead substrates.
(c) Vegetative mean of reproduction in fungi – fragmentation, budding and sporangiophores.
(d) Steps involved in asexual cycle of fungi – plasmogamy, karyogamy and meiosis in zygote resulting in haploid spores.

Answer

A

Question- Which of the following is the smallest living cell and can live without oxygen?
(a) Mycoplasma
(b) Mycorrhiza
(c) Euglena
(d) Trypanosoma

Answer

A

Question- Which of the following group of kingdom protista is being described in the statements given below ?
(i) This group includes diatoms and golden algae.
(ii) They are microscopic and float passively in water currents (plankton).
(iii) Most of them are photosynthetic.
(iv) They have deposits in their habitat; this accumulation over billion of years is referred to as ‘diatomaceous earth’.
(a) Dinoflagellates
(b) Chrysophytes
(c) Euglenoids
(d) Slime moulds

Answer

B

Question- Which of the following pairs come under the group chrysophytes?
(a) Diatoms and Euglena
(b) Euglena and Trypanosoma
(c) Diatoms and Desmids
(d) Gonyaulax and Desmids

Answer

C

Question- Which of the following statements is correct for dinoflagellates flagella ?
(a) A single flagellum lies in the transverse groove between the cell plates.
(b) A single flagellum lies in the longitudinal groove between the cell plates.
(c) Two flagella, one lies longitudinally and the other transversely in a furrow between the wall plates.
(d) Flagella are absent.

Answer

C

Question- Which of the following is a parasitic fungi on the mustard plant ?
(a) Albugo
(b) Puccinia
(c) Yeast
(d) Ustilago

Answer

A

Question-Clamp connection is found in
(a) basidiomycetes
(b) ascomycetes
(c) saccharomycetes
(d) haplomycetes

Answer

A

Question. Chief producers in oceans are
(a) Diatoms
(b) Desmids
(c) Archaebacteria
(d) All of these

Answer

A

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

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. Slime mould is characterized by the presence of
(a) Elaters
(b) Pseudoelaters
(c) Capillitum
(d) Capitulum

Answer

C

Question. Which of the following found in harsh habitat?
(a) Eubacteria
(b) Cyanobacteria
(c) Archaebacteria
(d) None of these

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. Streptococcus is used in preparation of:
(a) Wine
(b) Cheese
(c) Idli
(d) Bread

Answer

B

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

Answer

B

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

Answer

D

Question. Pigment present in cynobacteria is the
(a) r – phycocyanin
(b) r – phycoerythrin
(c) c – phycocyanin
(d) Anthocyanins

Answer

C

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. 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. 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. Who divided the animals into 2 groups, those which had red blood and those that did not?
(a) Whittaker
(b) T.O. Diener
(c) Aristotle
(d) W.M. Stanley

Answer

C

Question. Basis of classification according to Whittaker
(a) Cell structure
(b) Mode of reproduction
(c) Phylogenetic relationship
(d) All of these

Answer

D

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. Which of the following shows pendulum movement and fix atmospheric nitrogen?
(a) Nostoc
(b) Anabaena
(c) Oscillatoria
(d) Rhodospirillum

Answer

C

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

Answer

A

Question. Bacteria were discovered by:
(a) Robert Koch         
(b) A.V. Leeuwenhoek
(c) Robert Hooke       
(d) Louis Pasteur

Answer

B

Question. Diphtheria is caused by:
(a) Diplococcus
(b) Bacillus
(c) Corynebacterium
(d) Vibrio

Answer

C

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- Which group of fungi is commonly known as imperfect fungi ?
(a) Phycomycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Deuteromycetes

Answer

D

Question- Bacteria lack alternation of generation because there is
(a) neither syngamy nor reduction division.
(b) no distinct chromosomes.
(c) no conjugation.
(d) no exchange of genetic material.

Answer

A

Question- The subunit of capsid is called
(a) core
(b) nucleotide
(c) amino acid
(d) capsomere

Answer

D

Question- Which of the following statement is/ are correct for bacteria?
(a) They are the members of the kingdom monera.
(b) They live in extreme habitats such as hot springs,deserts, snow and deep oceans.
(c) They show the most extensive metabolic diversity.
(d) All of the above

Answer

D

Question- Which of the following statement(s) is/are correct about ascomycetes ?
(i) Neurospora, which is used in biochemical and genetic work is a member of this class.
(ii) They are mostly multicellular, e.g., Yeast, or rarely unicellular, e.g., Penicillium.
(iii) They are saprophytic, decomposers, parasitic or coprophilous.
(iv) Some examples are Aspergillus, Claviceps and Neurospora.
(a) Both (i) and (ii)
(b) Only (ii)
(c) (i), (iii) and (iv)
(d) All of these

Answer

C

Question- The genetic material of virus includes
(a) only RNA.
(b) only DNA.
(c) RNA and DNA both
(d) RNA or DNA , i.e., one nucleic acid in a virus.

Answer

D

Question- Read the following statements and answer the question given below
(i) They are saprophytic protists.
(ii) Under suitable conditions, they form an aggregation (called plasmodium) which may grow and spread over several feet.
(iii) During unfavourable conditions, the plasmodium
differentiates and forms fruiting bodies bearing spores at their tips.Which of the following class of protists is being described by the above statements ?
(a) Euglenoids
(b) Dinoflagellates
(c) Slime moulds
(d) Protozoans

Answer

C

Question- Plasmogamy is the fusion of
(a) two haploid cells including their nuclei.
(b) two haploid cells without nuclear fusion.
(c) sperm and egg.
(d) sperm and two polar nuclei.

Answer

B

Question- Which of the following statement(s) is/are correct ?
(i) Reproduction in fungi can take place by vegetative means – fragmentation, fission and budding.
(ii) Fusion of two nuclei is called plasmogamy.
(iii) Fusion of protoplasms between two motile or nonmotile gametes is called karyogamy.
(iv) Meiosis in zygote results in diploid spores.
(a) Only (i)
(b) Both (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) All of these

Answer

A

Question- Which of the following is used extensively in biochemical and genetic work ?
(a) Agaricus
(b) Alternaria
(c) Neurospora
(d) Mucor

Answer

C

Question- Fungi are filamentous with the exception of “X” which is unicellular. Identify X.
(a) Yeast
(b) Albugo
(c) Mucor
(d) Lichen

Answer

A

Question- Which of the following are the characters of dinoflagellates?
(i) They are planktonic golden yellow algae with soap box like structure.
(ii) They are marine red biflagellated protista.
(iii) They appear yellow, green, brown, blue and red in colour.
(iv) They are biflagellated organisms with pellicle.
(v) They are saprophytic (or) parasitic unicellular forms.
(a) (ii) and (iii)
(b) (ii) and (v)
(c) (i), (ii) and (iii)
(d) (ii), (iv) and (v)

Answer

C

Question- Which of the following statements is not correct for viruses?
(a) Viruses are obligate parasites.
(b) Viruses can multiply only when they are inside the living cells.
(c) Viruses cannot pass through bacterial filters.
(d) Viruses are made up of protein and DNA or RNA (never both DNA and RNA).

Answer

C

Question- Which of the following statements is correct for archaea?
(a) Archaea resemble eukaryotes in all respects.
(b) Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
(c) Archaea completely differ from both prokaryotes and eukaryotes.
(d) Archaea completely differ from prokaryotes.

Answer

B

Question- Which of the following processes are involved in the reproduction of protists ?
(a) Binary fission and budding
(b) Cell fusion and zygote formation
(c) Spore formation and cyst formation
(d) All of the above

Answer

D

Question- Which of the following statements is not correct for methanogens?
(a) They are archaebacteria.
(b) They live in marshy areas.
(c) Methane is their preferred carbon source.
(d) They are present in guts of several ruminant animals
(cow, buffaloes) and produce biogas (CH4) from the dung of these animals.

Answer

C

Question- Which of the following is not a viral disease ?
(a) AIDS and mumps
(b) Small pox and herpes
(c) Influenza
(d) Cholera

Answer

D

Question- Which of the following statements is incorrect ?
(a) TMV has a double-stranded RNA molecule.
(b) Most plant viruses are RNA viruses.
(c) The bacteriophage has double-stranded DNA.
(d) Most animal viruses are DNA viruses.

Answer

A

Question- Match the class of fungi given in column-I with their common name given in column-II and select the correct option.
Column-I                        Column-II
(Class of fungi)              (Common name)
A. Phycomycetes             I. Sac fungi
B. Ascomycetes              II. Algal fungi
C. Basidiomycetes          III. Fungi imperfecti
D. Deuteromycetes         IV. Club fungi
(a) A – II, B – I, C – IV, D – III
(b) A – II, B – IV, C – I, D – III
(c) A – IV, B – I, C – II, D – III
(d) A – IV, B – III, C – II, D – I

Answer

A

Question- Which of the following statements is a characteristic feature of chrysophytes?
(a) They are parasitic forms which cause diseases in animals.
(b) They have a protein rich layer called pellicle.
(c) They have indestructible cell wall layer deposited with silica.
(d) They are commonly called dinoflagellates.

Answer

C

Question-Bladderwort and Venus fly trap are examples of
(a) insectivorous plants
(b) parasitic plants
(c) N2 – rich plants
(d) aquatic plants

Answer

A

Question- Consider the following statements with respect to characteristic features of the kingdom.
(i) In animalia, the mode of nutrition is autotrophic.
(ii) In monera, the nuclear membrane is present.
(iii) In protista, the cell type is prokaryotic.
(iv) In plantae, the cell wall is present.
Of the above statements, which one is correct ?
(a) (i) only
(b) (ii) only
(c) (iii) only
(d) (iv) only

Answer

D

Question-Which of the following characteristic(s) is/are used by Whittaker for the classification of organisms ?
(a) Mode of nutrition
(b) Thallus organisation
(c) Phylogenetic relationships
(d) All of the above

Answer

D

Question- The given characters are seen in which of the following group?
(i) Unicellular, colonial, filamentous, marine or terrestrial forms.
(ii) The colonies are surrounded by a gelatinous sheath.
(iii) Some can fix atmospheric nitrogen in specialized cells called heterocysts.
(iv) They often form blooms in water bodies.
(a) Archaebacteria
(b) Cyanobacteria
(c) Chrysophytes
(d) Dinoflagellates

Answer

B

21. Which scientist classified plants into trees, shrubs and herbs and animals into two groups based on absence or presence red blood cells?
(a) Aristotle
(b) R. H. Whittaker
(c) D. J. Ivanowsky
(d) W. M. Stanley

Answer

A

Question- The given statements are some characters of a particular group of Kingdom protista.
(i) Most of them are fresh water organisms found in standing water.
(ii) They have a protein rich layer (called pellicle) which makes their body flexible.
(iii) They have two flagella, a short and a long one.
(iv) Though they are photosynthetic in the presence of sunlight, but in the absence of sunlight they behave like heterotrophs by predating on other smaller organisms.
Identify the correct group on the basis of these characters.
(a) Protozoans
(b) Chrysophytes
(c) Slime moulds
(d) Euglenoids

Answer

D

Question- Which of the following statements is correct for both blue-green algae and bacteria ?
(a) Both show anaerobic respiration.
(b) Both have chlorophyll pigment.
(c) Both are devoid of true nucleus.
(d) None of the above

Answer

C

Question- Which of the following class of fungi is being described by the given statements ?
(i) They are found in aquatic habitats and on decaying wood in moist and damp places.
(ii) Mycelium is aseptate and coenocytic.
(iii) Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
(iv) Some common examples are Mucor, Rhizopus and Albugo.
(a) Ascomycetes
(b) Phycomycetes
(c) Basidiomycetes
(d) Deuteromycetes

Answer

B

Question- Which of the following is/are example(s) of deuteromycetes?
(a) Alternaria
(b) Colletotrichum
(c) Trichoderma
(d) All of these

Answer

D

Question- Which of the following pigment is present in cyanobacteria?
(a) Chlorophyll ‘a’
(b) Chlorophyll ‘b’
(c) Chlorophyll ‘c’
(d) Chlorophyll ‘d’

Answer

A

Question- Which of the following statement(s) is/are correct about class basidiomycetes ?
(i) They are commonly known as imperfect fungi because only the asexual or vegetative phases of these fungi are known.
(ii) They grow in soil, on logs and tree stumps and in living plant bodies as parasites, e.g., rusts and smuts.
(iii) The mycelium is branched and septate.
(iv) Some common members are Agaricus, Ustilago and Puccinia.
(a) Only (i)
(b) Both (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) All of these

Answer

C

Question- Read the given statements and answer the question.
(i) It includes unicellular as well as multicellular fungi.
(ii) In multicellular forms, hyphae are branched and septate.
(iii) Conidiophore produces conidia (spores) exogenously in chain.
(iv) Sexual spores are ascospores produced endogenously in chain.
(v) Fruiting body is called ascocarp.
Identify the correct class of fungi which have all the above given characteristics.
(a) Phycomycetes
(b) Sac fungi
(c) Club fungi
(d) Fungi imperfecti

Answer

C

Question- Read the following statements and answer the question.
(i) Some members are saprophytes or parasites while a large number of them are decomposers of litter and help in mineral cycling.
(ii) They reproduce only by asexual spores known as conidia.
(iii) Mycelium is septate and branched.
(iv) Alternaria, Colletotrichum and Trichoderma are examples of this class.Which of the following class of fungi is being described by the above statements ?
(a) Phycomycetes
(b) Deuteromycetes
(c) Basidiomycetes
(d) Ascomycetes

Answer

B

Question-The symbiotic association between fungi and algae is called
(a) lichen
(b) mycorrhiza
(c) rhizome
(d) endomycorrhiza

Answer

A

Question- Which of the following statements regarding cyanobacteria is incorrect?
(a) It is also called blue green algae.
(b) They are chemosynthetic autotrophs.
(c) It forms blooms in polluted water bodies.
(d) It is unicellular, colonial or filamentous, marine or terrestrial bacteria.

Answer

B

Question- The bacteria which oxidize various inorganic substances and use the released energy for the synthesis of food are called _______________.
(a) Archaebacteria
(b) Heterotrophic bacteria
(c) Photosynthetic autotrophic bacteria
(d) Chemosynthetic autotrophic bacteria

Answer

D

Question- Match the terms given in column-I with their examples given in column-II and choose the correct option
Column-I                         Column-II
(Terms)                          (Examples)
A. Ascus                         I. Spirulina
B. Basidium                    II. Penicillium
C. Protista                     III. Agaricus
D. Cyanobacteria            IV. Euglena
E. Animalia                     V. Sponges
(a) A – II, B – III, C – IV, D – V, E – I
(b) A – I, B – II, C – III, D – V, E – IV
(c) A – II, B – V, C – III, D – I, E – IV
(d) A – II, B – III, C – IV, D – I, E – V

Answer

D

Question- Which of the following groups of protozoan is not correctly matched with its feature?
(a) Amoeboid – Marine forms have silica shells on their surface.
(b) Flagellated – Either free living or parasitic.
(c) Ciliated – Actively moving organisms due to presence of cilia.
(d) Sporozoans – Move and capture their prey with the help of false feet.

Answer

D

Question- Which of the following is an example of amoeboid protozoans ?
(a) Trypanosoma
(b) Paramecium
(c) Gonyaulax
(d) Entamoeba

Answer

D

Question- Choose the correct statements (i – v) regarding mycoplasma
(i) Mycoplasma has no cell wall.
(ii) Mycoplasma is the smallest living organism known.
(iii) Mycoplasma cannot survive without O2.
(iv) Mycoplasma are pathogenic in animals and plants.
(v) A sort of sexual reproduction occurs in bacterium by adopting a primitive DNA transfer from one bacterium to the other.
(a) Only (iii)
(b) (i), (iii) and (v)
(c) (i), (ii), (iv), and (v)
(d) All of the above

Answer

C

Question- Yeast is not included in protozoans but are placed fungi because
(a) it has no chlorophyll.
(b) some fungal hyphae grow in such a way that they give the appearance of pseudomycelium.
(c) it has eukaryotic organization.
(d) cell wall is made up of cellulose and reserve food material is starch.

Answer

B

MCQ Questions Chapter 2 Biological Classification Class 11 Biology

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