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Q. No.Thermococcus, Methanococcus and Methanobacterium exemplify
(1) archaebacteria that contain protein homologous to eukarytic core histones
(2) archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
(3) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
(4) bacteria that contain a cytoskeleton and ribosomes
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Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?
(1) Casuarina equisetifolia
(2) Crotolaria juncea
(3) Cycas revoluta
(4) Cicer arietinum
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Which of the following is a slime mould?
(1) Rhizopus
(2) Physarum
(3) Thiobacillus
(4) Anabaena
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Ergot of rye is caused by a species of:
(1) Phytophthora
(2) Uncinula
(3) Ustilago
(4) Claviceps
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True nucleus is absent in
(1) Anabaena
(2) Mucor
(3) Vaucheria
(4) Volvox
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Cell wall is absent in
(1) Aspergillus
(2) Funaria
(3) Mycoplasma
(4) Nostoc
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Which of the following shows coiled RNA strand and capsomeres?
(1) Polio virus
(2) Tobacco mosaic virus
(3) Measles virus
(4) Retrovirus
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Viruses have
(1) DNA enclosed in a protein coat
(2) prokaryotic nucleus
(3) single chromosome
(4) Both DNA and RNA
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Cellulose is the major component of cell walls of
(1) Pythium
(2) Xanthomonas
(3) Pseudomonas
(4) Saccharomyces
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Which of the following components provides sticky character to the bacterial cell?
(1) Cell wall
(2) Nuclear membrane
(3) Plasma membrane
(4) Glycocalyx
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