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CBTA FOCUS AREA REVISION QUESTIONS & ANSWERS, , BIOLOGICAL CLASSIFICATION, , One mark questions, 1) In which kingdom holozoic mode of nutrition is seen?, Ans: Animalia, 2) Name a fungus from which an antibiotic is extracted., Ans: Penicillium, 3) Name a unicellular fungus, Ans: Yeast, 4) What are bacteriophages?, Ans: Viruses that infect the bacteria, 5) The plant disease wheat rust is caused by the fungus named_____, Ans: Puccinia, 6) Kingdom of unicellular eukaryote: Protista; Kingdom of unicellular prokaryote: ______, Ans: Monera, 7) Name a fungus used to make bread and beer, Ans: Yeast, , 8) Infectious part of virus is _____, Ans: Genetic material., Two mark questions, 9) List some diseases in humans caused by viruses, Ans: Mumps, small pox, herpes, influenza, AIDS, 10) Comment on the asexual reproduction in fungi., Ans: Asexual reproduction is by spores called conidia or sporangiospores or zoospores., 11) The nature of cell wall of some kingdoms are given below. Assign them to their respective kingdoms, (Cell wall with chitin, Cell wall with cellulose, Non cellulosic cell wall with polysaccharide and amino, acids, Cell wall absent), Ans:, Kingdom Nature of cell wall, Monera, Noncellulosic cell wall with Polysaccharide and amino acid, Fungi, Cell wall with chitin, Plantae, Cell wall with cellulose, Animalia Cell wall absent, , CBTA, , 12) What are hyphae? Define coenocytic hyphae., Ans: The body of the fungus consists of long, slender thread-like structures called as hyphae., Some hyphae are continuous tubes filled with multinucleated cytoplasm .These are called coenocytic hyphae, 13) What are Saprophytes?, Ans: Some organisms like fungi get nutrients by absorbing soluble organic matter from dead substrates., These organisms are called as saprophytes, 14) Mention two symbiotic associations of fungus,  Fungus live in association with algae as Lichens,  Fungus live in association with roots of higher plants as Mycorrhiza, 15) Point out the merits of five kingdom classification,  All unicellular prokaryotic organisms were grouped together under Kingdom Monera and, unicellular eukaryotic organisms were placed in Kingdom Protista.,  Fungi were placed in a separate kingdom, 16) Name a plant disease caused by Virus. List some viral disease symptoms seen in plants., Ans: Mosaic disease of tobacco, -Mosaic formation, leaf rolling and curling, yellowing and vein clearing, dwarfing and stunted growth.

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17) Mention two demerits of five kingdom classification,  Unicellular organisms and the multicellular ones are grouped together, for example, Chlamydomonas, and Spirogyra were placed together,  Viruses did not find a place in this classification, 18) Identify A & B in the diagram given below, , Ans: A- Tobacco mosiac virus, B - Bacteriophage, 19) What is a capsid? Name its subunits .Mention its function, Ans: The protein coat of the virus is called as capsid. It is made of small subunits called capsomeres., It protects the nucleic acid of the virus., 20) Mention the vegetative reproduction in fungi, Ans: Reproduction in fungi can take place by vegetative means – fragmentation, fission and budding., 21) Assign the name of the scientist given below to their respective works., (M.W. Beijerinek, Pasteur, Dmitri Ivanowsky, W.M. Stanley), A Coined the name virus that means venom -_______, B Crystallised viruses -______, C Named the infectious living fluid from tobacco as Contagium vivum fluidum - _______, D Recognised certain microbes as causal organism of the mosaic disease of tobacco-___________, Ans: A- Pasteur, B- W.M. Stanley, C- M.W. Beijerinek, D- Dmitri Ivanowsky, , CBTA, , Three mark questions, 22) All organisms are classified into five kingdoms under five kingdom classification., a) Who proposed a Five Kingdom Classification?, R.H. Whittaker, b) Mention the five kingdoms, Monera, Protista, Fungi, Plantae and Animalia., c) What are the main criteria for classification?, Cell structure, Body organisation, Mode of nutrition, Reproduction and Phylogenetic relationships, 23) Reproduction in fungi take place by both asexual and sexual methods., a) Name three sexual spores seen in fungus, Oospores, Ascospores and Basidiospores., b) Explain the stages of sexual cycle, The sexual cycle involves the following three steps: (i) Fusion of protoplasms between two motile or nonmotile gametes called plasmogamy. (ii) Fusion of two nuclei called karyogamy. (iii) Meiosis in zygote, resulting in haploid spores., 24) Explain how a dikaryophase is formed within some fungus., Ans: When a fungus reproduces sexually, two haploid hyphae of compatible mating types come and fuse. In, some fungi the fusion of two haploid cells immediately results in diploid cells (2n). But in some fungi the, two haploid does not fuse and leading to a condition called a dikaryon and this phase is called dikaryophase., 25) Why viruses did not find a place in classification?, Ans: Since they are not considered truly ‘living’, because,  They possess a non-cellular organization. They are inactive outside the body of a host. They can be, crystallized and precipitated. But,,  They possess genetic material. They can grow and multiply when inside the host. They are obligate, parasites and attack specific hosts., <<<<Academic cell/CBTA>>>>