Which of the following is a slime mould?

(1) Rhizopus

(2) Physarum

(3) Thiobacillus

(4) Anabaena

Ergot of rye is caused by a species of:

(1) Phytophthora

(2) Uncinula

(3) Ustilago

(4) Claviceps

A genetically engineered micro-organism used successfully in bioremediation of oil spills is a species of:

(1) Pseudomonas

(2) Trichoderma

(3) Xanthomonas

(4) Bacillus

True nucleus is absent in

(1) Anabaena

(2) Mucor

(3) Vaucheria

(4) Volvox

Cell wall is absent in

(1) Aspergillus

(2) Funaria

(3) Mycoplasma

(4) Nostoc

Which of the following shows coiled RNA strand and capsomeres?

(1) Polio virus

(2) Tobacco mosaic virus

(3) Measles virus

(4) Retrovirus

Viruses have

(1) DNA enclosed in a protein coat

(2) prokaryotic nucleus

(3) single chromosome

(4) Both DNA and RNA

Cellulose is the major component of cell walls of

(1) Pythium

(2) Xanthomonas

(3) Pseudomonas

(4) Saccharomyces

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to

(1) Deuteromycetes

(2) Basidiomycetes

(3) Phycomycetes

(4) Ascomycetes

Select wrong statement.

(1) The viroids were discovered by D.J. lvanowsky.

(2) W.M. Stanley showed that viruses could be crystallized.

(3) The term 'contagium vivum fluidum' was coined by M.W. Beijerinck.

(4) Mosaic disease in tobacco and AIDS in human being are caused by viruses.