BIOLOGICAL CLASSIFICATION | Class 11 Biology chapter 2 MCQ in Quiz format | #bio_mcq 2 | NEET 2024

 Class 11 Biology MCQ Chapter 2

BIOLOGICAL CLASSIFICATION

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[1] Who was the earliest to attempt a more scientific basis for classification? 

(a) R.H. Whittaker 

(b) Linnaeus

(c) Aristotle 

(d) Bentham and Hooker

Ans (c) Aristotle

[2] Which of the following is not mentioned in Whittaker’s classification? 

(a) Virus 

(b) Viroids

(c) Lichens 

(d) All of these

Ans (d) All of these

[3] In Whittaker’s system of classification, prokaryotes are placed in the kingdom 

(a) Protista 

(b) Monera

(c) Plantae 

(d) Animalia

Ans (b) Monera

[4] Linnaeus is related to 

(a) Two-Kingdom classification

(b) Binomial nomenclature

(c) Systema Naturae

(d) All of the above

Ans (d) All of the above

[5] Colonies of Eubacteria are surrounded by 

(a) Polysaccharide sheath 

(b) Gelatinous sheath

(c) Mucous sheath 

(d) None of these

Ans (b) Gelatinous sheath

[6] Archaebacteria are the special type of bacteria since they live in some of the harsh habitats such as extreme salty areas are called 

(a) Halophiles 

(b) Methanogens

(c) Thermoacidophiles 

(d) All of the above

Ans (a) Halophiles

[7] Which bacteria are most abundant in nature?

(a) Archaebacteria 

(b) Photosynthetic autotrophic bacteria

(c) Chemosynthetic autotrophic bacteria

(d) Heterotrophic bacteria

Ans (d) Heterotrophic bacteria

[8] The smallest living cells that completely lack cell wall.

(a) Mycoplasma 

(b) Slime moulds

(c) Cyanobacteria 

(d) Diatoms

Ans (a) Mycoplasma

[9] Nostoc and Anabaena can fix atmospheric nitrogen in specialised cells known as 

(a) Conidiophores 

(b) Auxospores

(c) Hormogonia 

(d) Heterocysts

Ans (d) Heterocysts

[10] Which of the following is not true of organisms in the kingdom Monera? (2017)

(a) They originated at least 3.5 billion years ago 

(b) They have prokaryotic cellular organisation

(c) They may be autotrophic or heterotrophic in nature

(d) They reproduce by mitosis

Ans (d) They reproduce by mitosis

[11] Which bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production? 

(a) Archaebacteria

(b) Photosynthetic autotrophs

(c) Chemosynthetic autotrophs

(d) Heterotrophs

Ans (c) Chemosynthetic autotrophs

[12] The bacteria forming blooms in polluted water bodies are nutritionally 

(a) Photosynthetic autotrophs

(b) Chemosynthetic autotrophs

(c) Heterotrophs

(d) Saprophytic

Ans (a) Photosynthetic autotrophs

[13] In which of the following kingdom, both plant and animal like unicellular organisms are placed? 

(a) Monera 

(b) Protista

(c) Fungi 

(d) Plantae

Ans (b) Protista

[14] Organism which obtains their nutrition from dead and decaying matter (detritus) is called 

(a) Parasitic 

(b) Holophytic

(c) Saprophytic 

(d) Holozoic

Ans (c) Saprophytic

[15] In which of the following kingdoms some members have cell wall and some are without cell wall? 

(a) Fungi

(b) Protista

(c) Plantae 

(d) Animalia

Ans (b) Protista

[16] Which of the following is not present in Euglena?

(a) Chloroplasts 

(b) Flagella 

(c) Cellulosic cell wall 

(d) Proteinaceous pellicle

Ans (c) Cellulosic cell wall

[17] Red tides often cause massive fish kills and human illness in those eating shellfish. Which group of protists is responsible for red tides?

(a) Chlorophyta 

(b) Rhodophyta

(c) Phaeophyta 

(d) Dinoflagellates

Ans (d) Dinoflagellates

[18] Which organism behaves like plants in the presence of sunlight and absence of organic food, but in reverse condition behaves like animal? 

(a) Archaebacteria 

(b) Euglena

(c) Nostoc 

(d) Paramoecium

Ans (b) Euglena

[19] Cell walls of diatoms are indestructible because of the presence of 

(a) CaCO3 

(b) Silica

(c) Chitin 

(d) All of the above

Ans (b) Silica

[20] Select the wrong statement: (2016 - II)

(a) Diatoms are chief producers in the oceans

(b) Diatoms are microscopic and float passively in water

(c) The walls of diatoms are easily destructible 

(d) ‘Diatomaceous earth’ is formed by the cell wall of diatoms.

Ans (c) The walls of diatoms are easily destructible

[21] Which organism have an infectious spore like stage in their life cycle? 

(a) Amoeboid protozoans 

(b) Flagellated protozoans

(c) Ciliated protozoans 

(d) Sporozoans

Ans (d) Sporozoans

[22] From which of the following most of the antibiotics are prepared? 

(a) Fungi 

(b) Plants

(c) Actinomycetes 

(d) Archaebacteria

Ans (a) Fungi

[23] A dikaryon is formed when 

(a) Meiosis is arrested

(b) The two haploid nuclei do not fuse immediately

(c) Cytoplasm does not fuse

(d) None of the above

Ans (b) The two haploid nuclei do not fuse immediately

[24] With respect to fungal sexual cycle, choose the correct sequence of events. 

(a) Karyogamy, Plasmogamy and Meiosis

(b) Meiosis, Plasmogamy and Karyogamy

(c) Plasmogamy, Karyogamy and Meiosis

(d) Meiosis, Karyogamy and Plasmogamy

Ans (c) Plasmogamy, Karyogamy and Meiosis

[25] Morels and truffles groups of fungi are classified as

(a) Phycomycetes 

(b) Deuteromycetes

(c) Basidiomycetes 

(d) Ascomycetes

Ans (d) Ascomycetes

[26] Which of the following is a fungal disease?

(a) Citrus canker

(b) White spots on mustard

(c) Black rot of mustard

(d) Potato spindle tuber disease

Ans (b) White spots on mustard

[27] Asexual reproduction takes place in fungi with the help of

(a) Ascospores, basidiospores and zoospores 

(b) Zoospores, sporangiospores and conidia

(c) Zoospores, oospores and basidiospores

(d) Oospores, ascospores and basidiospores

Ans (b) Zoospores, sporangiospores and conidia

[28] Vegetative reproduction in fungi takes place by

(a) Fragmentation 

(b) Budding 

(c) Fission 

(d) All of the above

Ans (d) All of the above

[29] Fungi prefer to grow in 

(a) Warm and swampy places

(b) Warm and salty places

(c) Warm and humid places

(d) Cold and moist places

Ans (c) Warm and humid places

[30] Asexual spores are generally absent in 

(a) Ustilago 

(b) Trichoderma

(c) Neurospora 

(d) Yeast

Ans (a) Ustilago

[31] After karyogamy followed by meiosis, spores are produced exogenously in (2018)

(a) Neurospora 

(b) Alternaria 

(c) Agaricus 

(d) Saccharomyces

Ans (c) Agaricus

[32] 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? (2017)

(a) Bacillus 

(b) Pseudomonas 

(c) Mycoplasma 

(d) Nostoc

Ans (c) Mycoplasma

[33] Maximum nutritional diversity is found in the group: (2012 Pre)

(a) Plantae

(b) Fungi 

(c) Animalia

(d) Monera

Ans (d) Monera

[34] According to two-kingdom classification, the kingdom Plantae consists of 

(a) Autotrophs 

(b) Heterotrophs

(c) Mesotrophs 

(d) Chemotrophs

Ans (a) Autotrophs

[35] Which of the following is true for Kingdom Animalia?

(a) Cell wall are present in animal cell. 

(b) Their mode of nutrition is holozoic.

(c) They do not follow a definite growth pattern.

(d) All of them are capable of locomotion.

Ans (b) Their mode of nutrition is holozoic

[36] Lichens are very good pollution indicator because they are sensitive to: 

(a) Sulfur trioxide 

(b) Sulfur dioxide

(c) Carbon dioxide 

(d) Global warming

Ans (b) Sulfur dioxide

[37] The symbiotic association of fungi and algae is called

(a) Lichen 

(b) Mycorrhiza 

(c) Rhizome 

(d) Endomycorrhiza

Ans (a) Lichen

[38] Which of the following is correct about viroids? (2020)

(a) They have free RNA without protein coat. 

(b) They have DNA with protein coat.

(c) They have free DNA without protein coat.

(d) They have RNA with protein coat.

Ans (a) They have free RNA without protein coat. 

[39] Which of the following statement is incorrect? (2019)

(a) Viroids lack a protein coat. 

(b) Viruses are obligate parasites.

(c) Infective constituent in viruses is the protein coat.

(d) Prions consist of abnormally folded proteins.

Ans (c) Infective constituent in viruses is the protein coat.

[40] Select the wrong statements: (2015 Re)

(a) W.M. Stanley showed that viruses could be crystallised

(b) The term ‘Contagium vivum fluidum’ was coined by M.W. Beijerinek 

(c) Mosaic disease in tobacco and AIDS in hu

man being are caused by viruses

(d) The viroids were discovered by D.J. Ivanowsky

Ans (d) The viroids were discovered by D.J. Ivanowsky

🌟 The protein coat around a virus is called: (2017)

(a) Capsule 

(b) Core 

(c) Capsid 

(d) Trichome

Ans (c) Capsid

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