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4

Which of the following is a parasitic fungi on the mustard plant ?

A. Albugo

B. Puccinia

C. Yeast

D. Ustilago

Correct Answer :

A. Albugo


Albugo, the parasitic fungi on mustard belongs to the class phycomycetes, kingdom fungi.

Related Questions

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4

Match the class of fungi given in column I with their examples given in column II and choose the correct option
Column-IColumn-II
(Class of fungi)(Examples)
A. AscomycetesI. Rhizopus
B. BasidiomycetesII. Penicillium
C. DeuteromycetesIII. Ustilago
D. PhycomycetesIV. Alternaria

A. A IV, B III, C I, D II

B. A II, B III, C IV, D I

C. A IV, B I, C II, D III

D. A III, B IV, C II, D I

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4

Consider the following statements with respect to characteristic features of the kingdom.
(i) In animalia, the mode of nutrition is autotrophic.
(ii) In monera, the nuclear membrane is present.
(iii) In protista, the cell type is prokaryotic.
(iv) In plantae, the cell wall is present.
Of the above statements, which one is correct ?

A. (i) only

B. (ii) only

C. (iii) only

D. (iv) only

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4

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

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4

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.

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4

The subunit of capsid is called

A. core

B. nucleotide

C. amino acid

D. capsomere

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4

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.

A. Only (i)

B. Both (ii) and (iii)

C. (ii), (iii) and (iv)

D. All of these

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4

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

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4

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.

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4

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

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4

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.

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4

Protozons are not included in kingdom animalia because they are

A. mostly asymmetrical.

B. unicellular eukaryotes.

C. heterotrophic in nature.

D. multicellular prokaryotes.

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4

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

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4

Which of the following is used extensively in biochemical and genetic work ?

A. Agaricus

B. Alternaria

C. Neurospora

D. Mucor

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4

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

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4

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.
img5

A. Spores - Reproduction

B. Heterocysts - Nitrogen fixation

C. Pellicle - Recycling of nutrition

D. Mucilaginous sheath - Photosynthesis

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4

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

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4

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

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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.

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4

The figure given below shows the structure of a bacteriophage. Identify its parts labelled as A, B, C and D. 
img4

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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4

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

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4

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

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4

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

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4

Which of the following is a parasitic fungi on the mustard plant ?

A. Albugo

B. Puccinia

C. Yeast

D. Ustilago

What is the correct answer?

4

The symbiotic association of fungi and algae is called

A. lichen

B. mycorrhiza

C. rhizome

D. endomycorrhiza

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4

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 ?

A. Phycomycetes

B. Deuteromycetes

C. Basidiomycetes

D. Ascomycetes

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4

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

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4

Choose the correct statements (i v) regarding mycoplasma
(i) Mycoplasma has no cell wall.
(ii) Mycoplasma is the smallest living organism.
(iii) Mycoplasma cannot survive without O2.
(iv) Mycoplasma are pathogenic in animals and plants.
(v) A sort of sexual reproduction occurs in bacterium by adopting a primitive DNA transfer from one bacterium to the other.

A. Only (iii)

B. (i), (iii) and (v)

C. (i), (ii), (iv), and (v)

D. All of the above

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4

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

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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-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

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4

Which of the following are the characters of dinoflagellates?
(i) They are planktonic golden yellow algae with soap box like structure.
(ii) They are marine red biflagellated protista.
(iii) They appear yellow, green, brown, blue and red in colour.
(iv) They are biflagellated organisms with pellicle.
(v) They are saprophytic (or) parasitic unicellular forms.

A. (ii) and (iii)

B. (ii) and (v)

C. (i), (ii) and (iii)

D. (ii), (iv) and (v)