SSC CPO - Biological Classification 1000+ MCQ [Solved] PDF Download

1. 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

2. 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

3. Which class of fungi lacks sex organs but the process of plasmogamy is brought about by fusion of two vegetative or somatic cells of different strains or genotypes?
A. Sac fungi
B. Bracket fungi
C. Imperfect fungi
D. Phycomycetes
Answer : B

4. A specimen of fungus is brought by a student for identification. Upon close examination, he discovered that its hyphae are completely septate and it has gills on the underside of the pileus. To which fungal group does it most likely belong ?
A. Basidiomycetes
B. Zygomycetes
C. Ascomycetes
D. Chytrids
Answer : A

5. Protozons are not included in kingdom animalia because they are
A. mostly asymmetrical.
B. unicellular eukaryotes.
C. heterotrophic in nature.
D. multicellular prokaryotes.
Answer : B

6. 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

7. 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

8. 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

9. 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

10. A fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently and simultaneously as new cells are formed. This fungus belongs to
A. phycomycetes
B. zygomycetes
C. deuteromycetes
D. basidiomycetes
Answer : D

11. Which of the following is a parasitic fungi on the mustard plant ?
A. Albugo
B. Puccinia
C. Yeast
D. Ustilago
Answer : A

12. Chemosynthetic autotrophic bacteria are named so because
A. they oxidize various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production.
B. they oxidize various organic substances and use the released energy for their ATP production.
C. both (a) and (b)
D. none of these
Answer : A

13. 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

14. Which of the following pigment is present in cyanobacteria?
A. Chlorophyll a
B. Chlorophyll b
C. Chlorophyll c
D. Chlorophyll d
Answer : A

15. Match the scientists given in column I with their discovery given in column II and choose the correct option.

Column-I	Column-II
(Scientists)	(Discovery)
A. Ernst Mayr	I. Discovered Viroids
B. Whittaker	II. Gave the name virus
C. Pasteur	III. Proposed five kingdom classification
D. Diener	IV. 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

16. Yeast is not included in protozoans but in fungi because
A. it has no chlorophyll.
B. some fungal hyphae grow in such away 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

17. 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

18. 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

19. 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

20. The given figure shows the structure of filamentous blue green algae, Nostoc with a structure marked as X. Select the option which shows the correct identification of the X with its feature.

A. Spores - Reproduction
B. Heterocysts - Nitrogen fixation
C. Pellicle - Recycling of nutrition
D. Mucilaginous sheath - Photosynthesis
Answer : B

21. 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

22. The subunit of capsid is called
A. core
B. nucleotide
C. amino acid
D. capsomere
Answer : D

23. 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

24. 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

25. 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

26. The figure given below shows the structure of a bacteriophage. Identify its parts labelled as A, B, C and D. 

A. A - Tail fibres B - Head C - Sheath D - Collar
B. A - Sheath B - Collar C - Head D - Tail fibres
C. A - Head B - Sheath C - Collar D - Tail fibres
D. A - Collar B - Tail fibres C - Head D - Sheath
Answer : C

27. Which of the following is the correct sequence of three steps in the sexual cycle of fungi?
A. Mitosis -> Meiosis -> Fertilization
B. Plasmogamy -> Karyogamy -> Meiosis
C. Mitosis -> Plasmogamy -> Karyogamy
D. Karyogamy -> Plasmogamy -> Meiosis
Answer : B

28. Which of the following pair is not correctly matched ?
A. Anabaena Cyanobacteria
B. Amoeba Protozoa
C. Gonyaulax Dinoflagellates
D. Albugo Chrysophytes
Answer : D

29. Why food can be kept for a longer time in cold house than in normal conditions ? Because,
A. insect cannot enter.
B. bacterial multiplication stops.
C. bacterial multiplication is reduced.
D. there is plasmolysis at low temperature.
Answer : C

30. 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

31. Which scientist classify plants into trees, shrubs and herbs & animals into two groups having red blood cells and without red blood cells?
A. Aristotle
B. R. H. Whittaker
C. D. J. Ivanowsky
D. W. M. Stanley
Answer : A

32. Fungi are filamentous with the exception of X which is unicellular. Identify X.
A. Yeast
B. Algae
C. Bacteria
D. Lichen
Answer : A

33. 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? 

A. A
B. B
C. C sheath
D. D tail fibres
Answer : A

34. Which statement is not correct for viruses ?
A. Viruses are obligate parasites.
B. Viruses can multiply only wen 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

35. 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

36. 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

37. Clamp connection is found in
A. basidiomycetes
B. ascomycetes
C. saccharomycetes
D. haplomycetes
Answer : A

38. 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

39. Match column I (Kingdom) with column II (Class) and select the correct options

Column-I	Column-II
(Kingdom)	(Class)
A. Plantae	I. Archaebacteria
B. Fungi	II. Euglenoids
C. Protista	III. Phycomycetes
D. Monera	IV. 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

40. 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

41. Bacteria and yeast are similar in all the following features except that
A. both are unicellular.
B. both are prokaryotes.
C. both are capable of causing fermentation.
D. both produce spores.
Answer : B

42. Match column I with column II and choose the correct option.

Column I	Column II
A. Mycoplasma	(i) Nitrogen fixing cells
B. Decomposers	(ii) Blue green algae
C. Methanogens	(iii) Production of methane
D. Heterocysts	(iv) Most abundant heterotrophs
E. Cyanobacteria	(v) Pathogenic in plants and animals

A. A-(i) B-(ii) C-(iii) D-(iv) E-(v)
B. A-(iii) B-(v) C-(ii) D-(iv) E-(i)
C. A-(iii) B-(i) C-(v) D-(ii) E-(iv)
D. A-(v) B-(iv) C-(iii) D-(i) E-(ii)
Answer : D

43. Fungi show asexual reproduction by all of the following kinds of spores except
A. conidia
B. oospores
C. sporangiospores
D. zoospores
Answer : B

44. 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

45. Which of the following kingdom does not have nuclear membrane ?
A. Protista
B. Fungi
C. Monera
D. Plantae
Answer : C

46. 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

47. Choose the correct names of the different bacteria given below according to their shapes. 

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

48. 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

49. 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 ? 

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

50. 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