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1000+ Biological Classification MCQ for SBI PO [Solved]

Thursday 9th of March 2023

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1. Identify the basis of classification of fungi into phycomycetes, ascomycetes, basidiomycetes and deuteromycetes.
i. Fruiting bodies
ii. Nature of habitat
iii. Morphology of mycelium
iv. Mode of spore formation

A. i & ii only
B. ii & iii only
C. i, ii, & iv only
D. All of these
Answer : C
2. Match the characters given in column I with their examples given in column II.
Column IColumn II
A. Long slender thread(i) Lichen like structures
B. Association of fungi with(ii) Mycorrhiza roots of higher plants
C. Parasitic fungi on mustard(iii) Neurospora
D. Fungi extensively used in(iv) Albugo biochemical and genetic work
E. An association in which(v) Hyphae algal component is called phycobiont

A. A-(v) B-(ii) C-(iv) D-(iii) E-(i)
B. A-(iii) B-(i) C-(iv) D-(ii) E-(v)
C. A-(ii) B-(i) C-(iii) D-(v) E-(iv)
D. A-(iii) B-(ii) C-(iv) D-(i) E-(v)
Answer : A
3. Which of the following pairs comes under the group chrysophytes ?
A. Diatoms and Euglena
B. Euglena and Trypanosoma
C. Diatoms and Desmids
D. Gonyaulax and Desmids
Answer : C
4. Yeast is not included in protozoans but in 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
5. Bacteria are found to be primitive organisms because they
A. are small, microscopic which are not seen with naked eye.
B. cause serious diseases to human being, domesticated animals and crop plants.
C. produce endospores which are very resistant to adverse conditions.
D. possess incipient nucleus and show amitotic division.
Answer : D
6. How many organisms in the list given below are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia
A. Four
B. Five
C. Six
D. Three
Answer : C
7. Which of the following pigment is present in cyanobacteria?
A. Chlorophyll a
B. Chlorophyll b
C. Chlorophyll c
D. Chlorophyll d
Answer : A
8. Which of the following kingdom does not have nuclear membrane ?
A. Protista
B. Fungi
C. Monera
D. Plantae
Answer : C
9. 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
10. 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
11. Which of the following statement is incorrect ?
A. TMV has a double-stranded RNA molecule.
B. Most plant viruses are RNA viruses.
C. The bacteriophage has a double-stranded DNA molecule.
D. Most animal viruses are DNA viruses.
Answer : A
12. The bacteria which oxidize various inorganic substances and use the released energy for their ATP production are called _______________.
A. Archaebacteria
B. Heterotrophic bacteria
C. Photosynthetic autotrophic bacteria
D. Chemosynthetic autotrophic bacteria
Answer : D
13. 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
14. Match column I (containing fungus name) with column II (common name) and choose the correct options.
Column-IColumn-II
(Fungus name)(Commonly called)
A. PucciniaI. Yeast
B. UstilagoII. Mushroom
C. AgaricusIII. Smut fungus
D. SaccharomycesIV. Rust fungus

A. A I, B II, C III, D IV
B. A II, B III, C IV, D I
C. A III, B IV, C I, D II
D. A IV, B III, C II, D I
Answer : D
15. 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. Euglnoids
Answer : D
16. Match the type of protozoans given in column-I with their examples given in column-II and choose the correct option.
Column-IColumn-II
(Type of Protozoans)(Examples)
A. Amoeboid protozoansI. Paramecium
B. Ciliated protozoansII. Plasmodium
C. Flagellated protozoansIII. Amoeba
D. SporozoansIV. Trypanosoma


A. A I; B III; C IV; D II
B. A III; B I; C II; D IV
C. A III; B I; C IV; D II
D. A III; B IV; C I; D II
Answer : C
17. Which of the following is used extensively in biochemical and genetic work ?
A. Agaricus
B. Alternaria
C. Neurospora
D. Mucor
Answer : C
18. 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
19. Ustilago causes plant diseases (called smuts) because
A. they parasitize on cereals.
B. they lack mycelium.
C. they develop sooty masses of spores.
D. their affected parts becomes completely black.
Answer : D
20. Match the scientists given in column I with their discovery given in column II and choose the correct option.
Column-IColumn-II
(Scientists)(Discovery)
A. Ernst MayrI. Discovered Viroids
B. WhittakerII. Gave the name virus
C. PasteurIII. Proposed five kingdom classification
D. DienerIV. Darwin of the 20th century

A. A IV, B III, C II, D I
B. A III, B IV, C II, D I
C. A II, B III, C IV, D I
D. A I, B II, C III, D IV
Answer : A
21. Which of the following statement 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
22. Choose the correct names of the different bacteria given below according to their shapes. 
img2

A. A – Cocci, B – Bacilli, C – Spirilla, D – Vibrio
B. A – Bacilli, B – Cocci, C – Spirilla, D – Vibrio
C. A – Spirilla, B – Bacilli, C – Cocci, D – Vibrio
D. A – Spirilla, B – Vibrio, C – Cocci, D – Bacilli
Answer : A
23. Which of the following processes 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
24. 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
25. The symbiotic association of fungi and algae is called
A. lichen
B. mycorrhiza
C. rhizome
D. endomycorrhiza
Answer : A
26. 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
27. 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
28. 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
29. Which one single organism or the pair of organisms is correctly assigned to its taxonomic group?
A. Paramecium and Plasmodium belong to the same kingdom as that of Penicillium.
B. Lichen is a composite organism formed from the symbiotic association of an alga and a protozoan.
C. Yeast used in making bread and beer is a fungus.
D. Nostoc and Anabaena are examples of protista.
Answer : C
30. Which of the following is not a viral disease ?
A. AIDS and mumps
B. Small pox and herpes
C. Influenza
D. Cholera
Answer : D
31. Which of the following group of kingdom protista is being described by 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
32. Bacteria were regarded tobe plants because
A. some of them are green in colour.
B. they are present every where.
C. some of them cannot move.
D. they have a rigid cell wall.
Answer : D
33. Which one of the following statement 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
34. Which of the following pair is correctly matched ?
A. Fungi Saprophytic parasitic mode of nutrition.
B. Monera Nuclear membrane is present.
C. Plantae Cell wall is made up of cellulose.
D. Animalia Cell wall is absent.
Answer : B
35. How many bacteria are produced in four hours if a bacterium divides once in half an hour ?
A. 8
B. 64
C. 16
D. 256
Answer : D
36. Mycorrhizae are useful for plants because they
A. fix atmospheric nitrogen.
B. enhance absorption of nutrients from the soil.
C. kill insects and pathogen.
D. provide resistance against abiotic stresses.
Answer : B
37. 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
38. Which of the following pair is not correctly matched ?
A. Anabaena Cyanobacteria
B. Amoeba Protozoa
C. Gonyaulax Dinoflagellates
D. Albugo Chrysophytes
Answer : D
39. Match the class of fungi given in column-I with their common name given in column-II and select the correct option.
Column-IColumn-II
(Class of fungi)(Common name)
A. PhycomycetesI. Sac fungi
B. AscomycetesII. Algal fungi
C. BasidiomycetesIII. Fungi imperfecti
D. DeuteromycetesIV. 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
40. An X reproduces in such a great numbers that the water may appearred, producing a red tides and kills large marine animals like Z. X belongs to Y. Identify X, Y and Z.
A. X - Gonyaulax ; Y - Dinoflagellates; Z - Fishes
B. X - Paramecium ; Y - Protozoa ; Z - Crocodiles
C. X - Trypanosoma ; Y - Protozoa ; Z - Frogs
D. X - Plasmodium ; Y - Euglenoids ; Z - Oysters
Answer : A
41. 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
42. The given figure shows some labelled structure as A, B, C and D. In which structure the protein coat that encloses the nucleic acid is present? 
img6

A. A
B. B
C. C sheath
D. D tail fibres
Answer : A
43. Clamp connection is found in
A. basidiomycetes
B. ascomycetes
C. saccharomycetes
D. haplomycetes
Answer : A
44. Refer the given figure of bacteria cell and Nostoc and choose the option which shows correct label for the structure marked as A, B, C, D and E ? 
img1

A. A – Cell wall, B – Cell membrane, C – Heterocyst, D – DNA, E – Mucilagenous sheath
B. A – Cell wall, B – Cell membrane, C – DNA, D – Heterocyst, E – Mucilagenous sheath
C. A – Mucilagenous sheath, B – Cell membrane, C – DNA, D – Heterocyst, E – Cell wall
D. A – Cell membrane, B – Cell wall, C – DNA, D – Heterocyst, E – Mucilagenous sheath
Answer : B
45. Which of the following is/are example(s) of deuteromycetes?
A. Alternaria
B. Colletotrichum
C. Trichoderma
D. All of these
Answer : D
46. Protista includes
A. unicellular eukaryotes with well-defined nucleus only.
B. unicellular prokaryotes with membrane bound organelles.
C. unicellular eukaryotes with well-defined nucleus and membrane bound organelles.
D. both unicellular and multicellular eukaryotes with welldefined nucleus and membrane bound organelles.
Answer : C
47. Match column I (Kingdom) with column II (Class) and select the correct options
Column-IColumn-II
(Kingdom)(Class)
A. PlantaeI. Archaebacteria
B. FungiII. Euglenoids
C. ProtistaIII. Phycomycetes
D. MoneraIV. Algae

A. A IV, B III, C II, D I
B. A I, B II, C III, D IV
C. A III, B IV, C II, D I
D. A IV, B II, C III, D I
Answer : A
48. Bladderwort and Venus fly trap are examples of
A. insectivorous plants
B. parasitic plants
C. N2 ich plants
D. aquatic plants
Answer : A
49. 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
50. A virus can be considered a living organism because it
A. responds to touch stimulus
B. respires
C. reproduces (inside the host)
D. can cause disease
Answer : C

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