Which one of the following statements about mycoplasma is wrong ?

They are pleomorphic.
They are sensitive to penicillin.
They cause diseases in plants.
They are also called PPLO.

Solution

While working at the Rockefeller Institute,Brown reported isolation of a PPLO from human arthritic joint tissue in 1938. In discussing the significance of this observation, Brown reported successful treatment of arthritic patients in 1949 with a new antibiotic called aureomycin (Clark, 1997).

All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia :

Can induce root nodules on many plant species.
Cannot fix nitrogen in the free-living state.
Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids.
Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host’s cortex.

Solution

Frankia, is a nitrogen fixing mycelial bacterium which is associated symbiotically(and not free living) with the root nodules of several non legume plants.

Yeast is not included in protozoans but in fungi because

it has no chlorophyll
some fungal hyphae grow in such a way that they give the appearance of pseudomycelium
it has eukaryotic organisation
cell wall is made up of cellulose and reserve food material is starch

Two species of Amoeba X and Y were kept in fresh water and got adapted. Species X developed contractile vacuole. When both were transferred to sea water and got adapted, both X and Y lost their contractile vacuole. From these observation we conclude that

Both X and Y are marine species
Species Y is marine species and X is fresh water species
Species X is marine species and Y is fresh water species
Both X and Y are fresh water species

Which one of the following statements is true about Archaea?

Archaea resemble eukaryotes in all respects.
Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
Archaea completely differ from both prokaryotes and eukaryotes.
Archaea completely differ from prokaryotes.

Mycorrhiza is

a symbiotic association of plant roots and certain fungi.
an association of algae with fungi.
a fungus parasitie on root system of higher plants.
an association of Rhizobium with the roots of leguminous plants

In Whittaker’s five kingdom classification, eukaryotes were assigned to

all the five kingdom
only four of the five kingdoms
only three kingdom
only one kingdom

Which one of the following option is not belong to Ascomycetes ?

They are saprophytic, decomposer, coprophilous(growing on dung) and parasitic.
They include unicellular (e.g.yeast) and multicellular forms.
Their mycelium is coenocytic.
Aspergillus,Claviceps, Neurosporaare important members of Ascomycetes.

Which is the correct option for the all given characteristics of fungi ?

I.It includes unicellular as well as multicellular fungi.
II.In multicellular forms hyphae are branched and septate.
III.Conidiophore produces conidia (spores) exogenously inchain.
IV.Sexual spores are ascopores produced endogenously in chain.
V.Fruiting body is called ascocarp.

Phycomycetes
Sac fungi
Club fungi
Fungi imperfecti

Which statement is true for dinoflagellates flagella ?

A single flagellum in the transverse groove between the cell plates.
A single flagellum in the longitudinal groove between the cell plates.
Two flagella one lies longitudinally and one transversely in a furrow between the wall plates.
No flagella

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