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.
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 ...
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.
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.
Cell wall is absent in (a) Mycoplasma (b) Nostoc (c) Aspergillus (d) Funaria.
True nucleus is absent in (a) Vaucheria (b) Volvox (c) Anabaena (d) Mucor.
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
Viruses have (a) DNA enclosed in a protein coat (b) prokaryotic nucleus (c) single chromosome (d) both DNA and RNA.
Which among the following is not a prokaryote? (1) Nostoc (2) Mycobacterium (3) Saccharomyces (4) Oscillatoria
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 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
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.
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.