Gram-negative cells stain pink because:
A)
they have specialised lipids in their cell walls.
done
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B)
their peptidoglycan layer is thin.
done
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C)
their peptidoglycan layer is thick.
done
clear
D)
they are receptive to antibiotics.
done
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View Answer play_arrow
The given figure represent a type of virus with two parts labelled as 1 and 2. Identify the virus and the labelled parts.
A)
1-R2NA 2-Capsid Virus -Tobacco Mosaic Virus
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B)
1-DNA 2-Capsid Virus -Tobacco Mosaic Virus
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C)
1-RNA 2-Lipid Virus -Tobacco Mosaic Virus
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D)
1-RNA 2-Protein Virus -HIV
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Which of the following regarding protists, in general, is false?
A)
Protists are always parasitic.
done
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B)
Protists are single-celled.
done
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C)
Protists are heterotrophic.
done
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D)
All of the above
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View Answer play_arrow
An organism having cytoplasm, DNA and RNA but no cell wall is:
A)
Cyanobacterium
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B)
Mycoplasma
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C)
Bacterium
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D)
Virus
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View Answer play_arrow
Most of the antibiotics have no effect on viruses because:
A)
they kill all bacteria which form host of virus.
done
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B)
viruses are too small in size for antibiotics to act on them.
done
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C)
viruses have no metabolism of their own.
done
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D)
viruses produce a thick covering and endospores.
done
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View Answer play_arrow
During the evolution of eukaryotes from prokaryotes, which of the following did not occur?
A)
Infolding of the flexible cell membrane.
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B)
Loss of the cell wall.
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C)
A switch from aerobic to anaerobic metabolism.
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D)
Endosymbiosis of once free-living prokaryotes.
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View Answer play_arrow
Match the following columns.
Column-I Column-II A. Rod-shaped I. Coccus B. Spherical II. Bacillus C. Spiral-shaped III. Vibrio D. Comma-shaped IV. Spirrillum
A)
A-III B-II C-I D-IV
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B)
A-IV B-III C-II D-I
done
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C)
A-II B-I C-IV D-III
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D)
A-I B-IV C-III D-II
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View Answer play_arrow
A tooth scraping yields large numbers of corkscrew shaped bacteria. These bacteria are referred to as:
A)
Bacilli
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B)
Cocci
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C)
Spirilli
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D)
Helici
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View Answer play_arrow
The bacterium Bacillus thuringiensis can withstand heating, dryness, and toxic chemicals that would kill most other bacteria. This indicates that it is probably able to form:
A)
Pseudopodia
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B)
Endotoxins
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C)
Endospores
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D)
Pili
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View Answer play_arrow
Which of the following facts differentiates the plant virus from other viruses?
A)
DNA is the genetic material
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B)
Obligate parasites
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C)
RNA is the genetic material
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D)
Nucleo-protein nature
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View Answer play_arrow
Which of the following does not contain chlorophyll?
A)
Fungi
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B)
Algae
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C)
Bryophyta
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D)
Pteridophyta
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View Answer play_arrow
Pseudomycelium is a characteristic feature of:
A)
Mushroom
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B)
Mucor
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C)
Bread mould
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D)
Yeast
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View Answer play_arrow
Match the type of protozoans given in column-I with their examples given in column-II and choose the correct option.
Column-I (Type of Protozoans) Column-II (Examples) A. Amoeboid protozoans I. Paramoecium B. Ciliated protozoans II. Plasmodium C. Flagellated protozoans III. Amoeba D. Sporozoans IV. Trypanosoma
A)
A-I B-III C-IV D-II
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B)
A-III B-I C-II D-IV
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C)
A-III B-I C-IV D-II
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D)
A-III B-IV C-I D-II
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View Answer play_arrow
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
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B)
Dinoflagellates
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C)
Slime moulds
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D)
Protozoans
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View Answer play_arrow
Consider the below statements and identify the correct statements regarding classification. (i) Biological classification is the scientific ordering of organisms in a hierarchical series of groups on the basis of their relationships, i.e. morphological, evolutionary and others. (ii) Whittaker classified organisms on the basis of autotrophic and heterotrophic mode of nutrition. (iii) In five kingdom system of classification, living organisms can be divided into prokaryotic and eukaryotic cells on the basis of cell structure.
A)
(i), (ii) and (iii)
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B)
(i) and (iii)
done
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C)
(ii) and (iii)
done
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D)
(i) and (ii)
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View Answer play_arrow
Match column-I with column-II and select the correct answer using the codes given below.
Column-I (Fungus name) Column-II (Commonly called) A. Puccinia I. Yeast B. Ustilago II. Mushroom C. Agaricus III. Smut fungus D. Saccharomyces IV. Rust fungus
A)
A-I B-II C-III D-IV
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B)
A-II B-III C-IV D-I
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C)
A-III B-IV C-I D-II
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D)
A-IV B-III C-II D-I
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View Answer play_arrow
Antibiotics are mostly obtained from:
A)
Bacteria
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B)
Viruses
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C)
Angiosperms
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D)
Fungi
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View Answer play_arrow
Identify the following figures.
A)
A - Euglena, B - Paramoecium, C - Agaricus
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B)
A - Euglena, B - Planaria, C - Agaricus
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C)
A - Planaria, B - Paramoecium, C - Agaricus
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D)
A - Euglemi, B - Paramoecium, C - Aspergillus
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View Answer play_arrow
Bacteria were regarded to be plants because:
A)
some of them are green.
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B)
they are present everywhere.
done
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C)
some of them cannot move.
done
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D)
they have a rigid cell wall.
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View Answer play_arrow
Locomotory structures are absent in:
A)
Sporozoans
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B)
Ciliates
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C)
Zooflagellates
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D)
Rhizopods
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View Answer play_arrow
Which of the following are the characters of Dinoflagellates? (i) Planktonic golden yellow algae with soap box like structure. (ii) Marine red biflagellated protista. (iii) Appear yellow, green, brown, blue and red in colour. (iv) Biflagellated organisms with pellicle. (v) Saprophytic or parasitic unicellular forms.
A)
(i), (ii) and (iii) only
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B)
(ii), (iv) and (v) only
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C)
(ii) and (iii) only
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D)
(ii) and (v) only
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View Answer play_arrow
How many kingdoms contain eukaryotes in five kingdom system of classification of R.H Whittaker?
A)
Four kingdoms
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B)
One kingdom
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C)
Two kingdoms
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D)
Three kingdoms
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View Answer play_arrow
Match column-I with column-II and select the correct answer using the codes given below.
Column-I (Kingdom) Column-II (Class) A. Plantae I. Arhaebacteria B. Fungi II. Euglenoids C. Protista III. Phycomucetes D. Monera IV. Algae
A)
A-IV B-III C-II D-I
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B)
A-I B-II C-III D-IV
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C)
A-III B-IV C-II D-I
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D)
A-IV B-II C-III D-I
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View Answer play_arrow
Litmus is obtained from:
A)
Lichen
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B)
Algae
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C)
Fungi
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D)
Protozoa
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View Answer play_arrow
A bacteriophage is:
A)
a virus attacking a bacterium.
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B)
a bacterium attacking a virus.
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C)
a stage in the life-cycle of bacterium.
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D)
virus attacking another virus.
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View Answer play_arrow
Black water fever is caused by:
A)
Plasmodium malariae
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B)
P. ovule
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C)
P. falciparum
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D)
P. vivax
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View Answer play_arrow
Identify the correct statements regarding archaebacteria.
(i) Archaebacteria differs from other bacteria in having different cell wall structure.
(ii) Their cell wall is made up of cellulose and contains high amount of unsaturated fatty acid, which is responsible for their survival in extreme conditions.
(iii) Thermoacidophiles have dual ability to tolerate high temperature as well as high acidity.
A)
(i) and (ii)
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B)
(ii) and (iii)
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C)
(i) and (iii)
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D)
(i), (ii) and (iii)
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View Answer play_arrow
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
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B)
Sac fungi
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C)
Club fungi
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D)
Fungi imperfecti
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View Answer play_arrow
Contractile vacuoles of Paramoecium are analogous to:
A)
Sweat glands of mammals
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B)
Uriniferous tubules
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C)
Gastrovascular cavity of Hydra
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D)
Typhlosole of earthworm
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View Answer play_arrow
Members of Phycomycetes are found:
(i) in aquatic habitats
(ii) on decaying wood
(iii) in moist and damp places
(iv) as obligate parasite on plants
Which of the statements given above are correct?
A)
(i) and (ii)
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B)
(ii), (iii) and (iv)
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C)
(i), (ii) and (iii)
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D)
(i), (ii), (iii) and (iv)
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View Answer play_arrow
The symbiotic association of fungi and algae is called:
A)
Lichen
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B)
Mycorrhiza
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C)
Rhizome
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D)
Endomycorrhiza
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View Answer play_arrow
Which of the following combinations of characters is true for slime moulds?
A)
Parasitic, plasmodium with true walls, spores dispersed by air currents.
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B)
Saprophytic, plasmodium without walls, spores dispersed by water.
done
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C)
Parasitic, plasmodium without walls, spores dispersed by water.
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D)
Saprophytic, plasmodium without walls, spores dispersed by air currents.
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View Answer play_arrow
Nutritionally bacteria are:
A)
Autotrophic
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B)
Symbiotic
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C)
Parasitic
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D)
All of the above
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View Answer play_arrow
Which bacteria would function best in hot temperatures\[(45-60{}^\circ C)\]?
A)
Psychrophiles
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B)
Thermophiles
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C)
Mesophiles
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D)
All would do equally well
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View Answer play_arrow
If the generation time of a bacterium is 40 minutes and a culture containing \[{{10}^{7}}\] cells/ml is grown for 4 hours, then calculate its population after that period.
A)
\[64\times {{10}^{7}}\]
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B)
\[32\times {{10}^{7}}\]
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C)
\[6\times {{10}^{7}}\]
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D)
\[40\times {{10}^{7}}\]
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View Answer play_arrow
Smallest virus is:
A)
Foot and Mouth virus
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B)
Alfalfa Mosaic virus
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C)
Pseudomonas
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D)
TMV
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View Answer play_arrow
Yeast is an important source of:
A)
Vitamin C
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B)
Vitamin B
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C)
Vitamin A
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D)
Vitamin D
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View Answer play_arrow
In manufacturing of bread, it becomes porous due to release of \[C{{O}_{2}}\] by the action of:
A)
Virus
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B)
Yeast
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C)
Bacteria
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D)
Protozoans
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View Answer play_arrow
Which of the following statements is correct for both blue-green algae and bacteria?
A)
Both show anaerobic respiration.
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B)
Both have chlorophyll pigment.
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C)
Both are devoid of true nucleus.
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D)
None of the above
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View Answer play_arrow
Match column-I with column-II and select the correct answer using the codes given below.
Column-I Column-II A. Chrysophytes I. Paramoecium B. Dinoflagellates II. Euglena C. Euglenoids III. Gonyaulax D. Protozoans IV Diatoms
A)
A-I B-III C-II D-IV
done
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B)
A-II B-IV C-III D-I
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C)
A-IV B-II C-III D-I
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D)
A-IV B-III C-II D-I
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View Answer play_arrow
The phylogenetic system of classification was put forth by:
A)
Carolus Linnaeus
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B)
George Bentham and Joseph Dalton Hooker
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C)
Theophrastus
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D)
Adolf Engler and Karl PrantI
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View Answer play_arrow
Plasmodium, the parasite, belongs to class:
A)
Sarcodina
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B)
Ciliata
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C)
Sporozoa
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D)
Dinophyceae
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View Answer play_arrow
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)
Monera
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B)
Fungi
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C)
Plantae
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D)
Protista
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View Answer play_arrow
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) Altemaria, Colletotrichum and Trichoderma are examples of this class. Which of the following class of fungi is being described by the above statements?
A)
Phycomycetes
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B)
Deuteromycetes
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C)
Basidiomycetes
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D)
Ascomycetes
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View Answer play_arrow
Match column-I with column-II and select the correct answer using the codes given below.
Column-I Column-II A. Streptomyces I. Food poisoning B. Rhizobium II. Source of antibiotics C. Nitrosomonas III. Nitrogen fixation D. Acetobacter IV. Nitrification V. Vinegar synthesis
A)
A-II B-III C-I D-V
done
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B)
A-II B-III C-IV D-V
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C)
A-IV B-V C-I D-III
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D)
A-V B-I C-III D-IV
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View Answer play_arrow
Which one of the following pairs is not correctly matched?
A)
Anabaena - Cyanobacteria
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B)
Amoeba - Protozoa
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C)
Gonyaulax - Dinoflagellates
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D)
Albugo - Chrysophytes
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View Answer play_arrow
The cell wall of fungi is made up of:
A)
Chitin
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B)
Cellulose
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C)
Pectin
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D)
Suberin
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View Answer play_arrow
The main difference between Gram positive and Gram negative bacteria lies in the composition of:
A)
Cilia
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B)
Cell wall
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C)
Nucleolus
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D)
Cytoplasm
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View Answer play_arrow
LPP-1 is a:
A)
Bacterium
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B)
Fungus
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C)
Bacteriophage
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D)
Cyanophage
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View Answer play_arrow
The conditions which would be favoured by thermoacidophiles are:
A)
Hot and alkaline
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B)
Snow and acidic
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C)
Hot sulphur spring
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D)
Gut of cows
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View Answer play_arrow
Natural system of classification differs from artificial system in:
A)
employing only one floral trait
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B)
taking only one vegetative trait
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C)
bringing out similarities and dissimilarities
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D)
developing evolutionary trends
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View Answer play_arrow
The genetic material in viruses is/are:
A)
Only RNA
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B)
Only DNA
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C)
RNA and DNA both
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D)
RNA or DNA i. e. one nucleic acid in a virus
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View Answer play_arrow
Which of the following fungi are edible?
A)
Agaricus campestris
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B)
Morchella esculenta
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C)
Podaxon prodaxis
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D)
All of the above
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View Answer play_arrow
Match the terms given in column-I with their examples given in column-II and choose the correct option.
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
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B)
A-I B-II C-III D-V E-IV
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C)
A-II B-V C-III D-I E-IV
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D)
A-II B-III C-IV D-I E-V
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View Answer play_arrow
Which protist reproduces both by binary fission and conjugation?
A)
Amoeba
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B)
Paramoecium
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C)
Euglena
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D)
Monocystis
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View Answer play_arrow
Which of the following statements is not correct for methanogens?
A)
They are archaebacteria.
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B)
They live in marshy areas.
done
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C)
Methane is their preferred carbon source.
done
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D)
They are present in guts of several ruminant animals (cow, buffaloes) and produce biogas \[(C{{H}_{4}})\] from the dung of these animals.
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View Answer play_arrow
The given figure shows some structures labelled as 1, 2, 3 and 4. Which structure has the protein coat that encloses the nucleic acid?
A)
1
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B)
2
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C)
3
done
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D)
4
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View Answer play_arrow
Enveloped virus infects/enters the host cell through:
A)
Direct penetration
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B)
Injecting nucleic acid
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C)
Endocytosis
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D)
Endocytosis through chemical stimulators
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View Answer play_arrow
Infective stage of Entamoeba histolytica is:
A)
Trophozoite
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B)
Pre cyst
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C)
Uninucleate cyst
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D)
Tetranucleate cyst
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View Answer play_arrow
Cyanobacteria are:
A)
mosses which attack bacteria
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B)
bacteria which attack cyanophyceae
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C)
autotrophic organisms with phycocyanin
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D)
None of the above
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View Answer play_arrow
Whittaker placed prokaryotes and akaryotes in:
A)
Protista
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B)
Protozoa
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C)
Plantae
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D)
Monera
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View Answer play_arrow
Viruses that infect bacteria, multiply and cause their lysis, are called:
A)
Lysozymes
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B)
Lipolytic
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C)
Lytic
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D)
Lysogenic
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View Answer play_arrow
Archaea differ from eubacteria in which one of the following features?
A)
They have a rigid wall.
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B)
Their cell wall lacks peptidoglycan component.
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C)
They have 16s rRNA.
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D)
They are very ancient.
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View Answer play_arrow
Leishmania tropica produces:
A)
Sleeping sickness
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B)
Malaria
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C)
Dysentery
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D)
Oriental sores
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View Answer play_arrow
Common bread mold is:
A)
Yeast
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B)
Rhizopus
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C)
Bacteria
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D)
Virus
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View Answer play_arrow
Which of the following fixes atmospheric N?
A)
Nostoc
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B)
Algae
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C)
Methanogens
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D)
None of these
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View Answer play_arrow
Which of the following is not a character of protista?
A)
Protists are prokaryotic.
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B)
Some protists have cell walls.
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C)
Mode of nutrition is both autotrophic and heterotrophic.
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D)
Body organisation is cellular.
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View Answer play_arrow
Which of the following statements is not correct for viruses?
A)
Viruses are obligate parasites.
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B)
Viruses can multiply only when they are inside the living cells.
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C)
Viruses cannot pass through bacterial filters.
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D)
Viruses are made up of protein and DNA or RNA (never both DNA and RNA).
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View Answer play_arrow
Plasmogamy is fusion of:
A)
Two haploid cells including their nuclei
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B)
Two haploid cells without nuclear fusion
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C)
Sperm and egg
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D)
Sperm and two polar nuclei
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View Answer play_arrow
When fungi feed on dead organic matter, they are known as:
A)
Dimorphic
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B)
Parasites
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C)
Saprophytes
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D)
None of these
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View Answer play_arrow
Ergot is caused by:
A)
Claviceps
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B)
Penicillium
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C)
Aspergillus
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D)
Rhizobium
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View Answer play_arrow
Koch's postulates are related to:
A)
Cell structure of bacteria
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B)
Cell structure of micro-organisms
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C)
Laws of diseases
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D)
Origin of micro-organisms
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View Answer play_arrow