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Biological Classification Test - 48

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Biological Classification Test - 48
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  • Question 1
    1 / -0
    Which one does not belong to monera?
    Solution
    Monera is the simplest living organism which is prokaryotic, unicellular and autotrophic. Mycoplasma, eubacteria and archaebacteria belong to monera. Slime moulds are eukaryotic and they colonise to form multicellular structures. So, they are classified as protists. 
    So, the correct answer is option A.
  • Question 2
    1 / -0
    When there are two haploid nuclei per cell in some fungi before the forming the diploid structure, this stage is called
    Solution
    Fungi like Ascomycota and Basidiomycota undergo the reproductive phase where two genetically different nuclei come in the single cytoplasm before fusion, this stage is called as dikaryon.
    So, the correct answer is 'Dikaryon'
  • Question 3
    1 / -0
    Lime-knots of slime moulds are
    Solution
    Lime-knot is formed by the accumulation of calcium carbonate or lime of peridium, sporangia and fruiting body of slime moulds. Inside the fruiting body of slime mould there is a mass of sterile fiber called as capillita. Capillitia is a cancerous network formed by the deposition of calcium carbonate
    So, the correct answer is 'Capillitia'
  • Question 4
    1 / -0
    Tobacco mosaic virus was first reported by
    Solution
    Two scientists contributed to the discovery of Tobacco mosaic virus which was the first virus. In 1892 Ivanoski reported that extracts from infected leaves of tobacco were infectious even after filtration. In 1898, Beijerinck was the first to call virus, the infective agent of the tobacco mosaic. Thus the correct answer is option B.
  • Question 5
    1 / -0
    Mosaic disease was first reported by 
    Solution
    In 1857, tobacco growers in Netherland began to report that there was a new disease of tobacco that was not caused by fungi or bacteria. In 1879, Adolph Mayer who working in the Netherlands investigated this disease and named it the mosaic disease of tobacco. Thus, the correct answer is option 'Adolf Mayer'.
  • Question 6
    1 / -0
    Which of the following microbiologist termed bacteria as animalcules?
    Solution
    Leeuwenhoek using his self-made microscope first observed and described microorganisms specifically bacteria as animalcules (animalculum in Latin means tiny animals). He reported this observation using the saliva sample from his own mouth where he saw the bacterial cells swimming. Thus, the correct answer is option B.
  • Question 7
    1 / -0
     Dmitry Ivanovsky reported the existence of virus in
    Solution
    In 1892 Dmitry Ivanoski, a Russian botanist reported that extracts from infected leaves of tobacco were infectious even after filtration.
    So, the correct answer is 'Tobacco'
  • Question 8
    1 / -0
    Mosquitoes were carrying the cause of yellow fever. The statement was concluded by
    Solution
    Dr. Carlos Finlay, a Cuban physician identified the cause of yellow fever. He played an important role in reducing the incidence of yellow fever in tropical climates throughout the world. Finlay concluded that yellow fever and malaria could not be transmitted from person to person without a vector (carrier). He identified that mosquito was the carrier of both illnesses. Thus the correct answer is option A.
  • Question 9
    1 / -0
    Virion containing only a single copy of nucleic acid is called as
    Solution
    The virions are the infectious viral particles which have genetic material and a protein coat. The virions or the viruses are classified on the basis of the genetic material. The virion which has only one copy of the nucleic acid are known as haploid viruses. There are certain viruses which have two copies of the nucleic acid are known as diploid viruses. 
    Thus, the correct answer is option C. 
  • Question 10
    1 / -0
    The term 'genetic RNA' refers to
    Solution
    RNA is a nucleic acid found in the nucleus as well as in the cytoplasm. There are two main kinds of RNA i.e., genetic and nongenetic. The genetic RNA acts as genetic material in viruses and the nongenetic RNA mostly function in protein synthesis in many organisms. Mitochondrial RNA also helps in protein translation almost 8% of mitochondrial DNA codes for mitochondrial RNA. Lac operon is a kind of regulatory system prokaryotes, here also the mRNA helps to make different protein in order to control the expression of certain genes. Thus the correct answer is option A.
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