Related Questions
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Which of the following is a parasitic fungi on the mustard plant ?
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4
How many bacteria are produced in four hours if a bacterium divides once in half an hour ?
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4
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.
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4
Which of the following pigment is present in cyanobacteria?
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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?
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4
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.
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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.
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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.
B. Heterocysts - Nitrogen fixation
C. Pellicle - Recycling of nutrition
D. Mucilaginous sheath - Photosynthesis
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4
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
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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
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4
When a moist bread is kept exposed in air, it becomes mouldy and black because
A. spores are present in the water.
B. spores are present in the bread.
C. spores are present in the air.
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4
Why food can be kept for a longer time in cold house than in normal conditions ? Because,
B. bacterial multiplication stops.
C. bacterial multiplication is reduced.
D. there is plasmolysis at low temperature.
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The genetic material of virus includes
D. RNA or DNA i.e. one nucleic acid in a virus.
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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
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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.
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Dikaryon formation is the characteristic feature of
A. ascomycetes and basidiomycetes.
B. phycomycetes and basidiomycetes.
C. ascomycetes and phycomycetes.
D. phycomycetes and zygomycetes.
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4
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.
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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
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Bacteria and yeast are similar in all the following features except that
C. both are capable of causing fermentation.
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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
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Which of the following is an example of amoeboid protozoans ?
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Match the type of protozoans given in column-I with their examples given in column-II and choose the correct option.
Column-I | Column-II | (Type of Protozoans) | (Examples) |
A. Amoeboid protozoans | I. Paramecium |
B. Ciliated protozoans | II. Plasmodium |
C. Flagellated protozoans | III. Amoeba |
D. Sporozoans | IV. 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
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Protists are
A. single-celled eukaryotes.
B. multicellular eukaryotes.
C. single-celled prokaryotes.
D. single-celled akaryote.
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Fungi show asexual reproduction by all of the following kinds of spores except
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Lichens indicate SO2 pollution because they
A. show association between algae and fungi.
B. grow faster than others.
D. flourish in SO2 rich environment.
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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.
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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 ?
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Fungi are filamentous with the exception of X which is unicellular. Identify X.
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Which of the following pair is not correctly matched ?
A. Anabaena Cyanobacteria
C. Gonyaulax Dinoflagellates
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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