The size of Pleuropneumonia - like organism (PPLO) is (1) 0.1 µm (2) 0.02 µm (3) 1 – 2 µm (4) 10 – 20 µm
Which among the following is not a prokaryote? (1) Nostoc (2) Mycobacterium (3) Saccharomyces (4) Oscillatoria
After karyogamy followed by meiosis, spores are produced exogenously in : (1) Agaricus (2) Alternaria (3) Neurospora (4) Saccharomyces
Which of the following is incorrect about Cynobacteria? (1) They have chlorophyll 'a' similar to green plants (2) They are photoautotrophs (3) They lack heterocysts (4) They often form blooms in polluted water bodies
Viruses have (a) DNA enclosed in a protein coat (b) prokaryotic nucleus (c) single chromosome (d) both DNA and RNA.
Which of the following shows coiled RNA strand and capsomeres? (a) Polio virus (b) Tobacco mosaic virus (c) Measles virus (d) Retrovirus
Five kingdom system of classification suggested by R.H. Whittaker is not based on (a) presence or absence of a well defined nucleus (b) mode of reproduction (c) mode of nutrition (d) complexity of body organisation.
Which one of the following matches is correct? (a) Mucor Reproduction by Conjugation Ascomycetes (b) Agaricus Parasitic fungus Basidiomycetes (c) Phytophthora Aseptate mycelium Basidiomycetes (d) Alternaria Sexual reproduction absent Deuteromycetes
True nucleus is absent in (a) Vaucheria (b) Volvox (c) Anabaena (d) Mucor.
Cell wall is absent in (a) Mycoplasma (b) Nostoc (c) Aspergillus (d) Funaria.
Choose the wrong statement. (a) Morels and truffles are poisonous mushrooms. (b) Yeast is unicellular and useful in fermentation. (c) Penicillium is multicellular and produces antibiotics. (d) Neurospora is used in the study of biochemical genetics.
Pick up the wrong statement. (a) Some fungi are edible. (b) Nuclear membrane is present in Monera. (c) Cell wall is absent in Animalia. (d) Protists have photosynthetic and heterotrophic modes of nutrition.
In which group of organisms the cell walls form two thin overlapping shells which fit together? (a) Dinoflagellates (b) Slime moulds (c) Chrysophytes (d) Euglenoids
Select the wrong statement. (a) The term contagium vivum fluidum' was coined by M. W. Beijerinck. (b) Mosaic disease in tobacco and AIDS in human being are caused by viruses. (c) The viroids were discovered by D.J. Ivanowsky. (d) W.M. Stanley showed that ...
The structures that help some bacteria to attach to rocks and/or host tissues are (a) mesosomes (b) holdfast (c) rhizoids (d) fimbriae.
The imperfect fungi which are decomposers of litter and help in mineral cycling belong to (a) Phycomycetes (b) Ascomycetes (c) Deuteromycetes (d) Basidiomycetes.
Which one is a wrong statement? (a) Haploid endosperm is typical feature of Gymnosperms. (b) Brown algae have chlorophyll a and c and fucoxanthin. (c) Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms. (d) Mucor has biflagellate zoospores.
Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the Kingdom (a) Fungi (b) Animalia (c) Monera (d) Protista.
One of the major components of cell wall of most fungi is (a) cellulose (b) hemicellulose (c) chitin (d) peptidoglycan.
Which of the following statements is wrong for viroids? (a) They cause infections. (b) Their RNA is of high molecular weight. (c) They lack a protein coat. (d) They are smaller than viruses.
Which one of the following statements is wrong? (a) Eubacteria are also called false bacteria. (b) Phycomycetes are also called algal fungi. (c) Cyanobacteria are also called bluegreen algae. (d) Golden algae are also called desmids.
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the (a) methanogens (b) eubacteria (c) halophiles (d) thermoacidophiles.
Select the wrong statement. (a) The walls of diatoms are easily destructible. (b) ‘Diatomaceous earth’ is formed by the cell walls of diatoms. (c) Diatoms are chief producers in the oceans. (d) Diatoms are microscopic and float passively in water.
Methanogens belong to (a) eubacteria (b) archaebacteria (c) dinoflagellates (d) slime moulds.
Which one of the following is wrong for fungi? (a) They are eukaryotic. (b) All fungi possess a purely cellulosic cell wall. (c) They are heterotrophic. (d) They are both unicellular and multicellular.
DNA replication in bacteria occurs (a) within nucleolus (b) prior to fission (c) just before transcription (d) during S phase.
Which of the following components provides sticky character to the bacterial cell? (a) Nuclear membrane (b) Plasma membrane (c) Glycocalyx (d) Cell wall
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? (a) Pseudomonas (b) Mycoplasma (c) Nostoc (d) Bacillus
Viroids differ from viruses in having (a) DNA molecules without protein coat (b) RNA molecules with protein coat (c) RNA molecules without protein coat (d) DNA molecules with protein coat.
Which of the following are found in extreme saline conditions? (a) Eubacteria (b) Cyanobacteria (c) Mycobacteria (d) Archaebacteria