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Biological Classification Test - 1

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Biological Classification Test - 1
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  • Question 1
    1 / -0

    Match the column A with B:

    A (Discoverer) B (Organism)
    1. Diener a. Lichens
    2. Prusiner b. Viroids
    3. Loeffler c. Prions
    4. Simon d. Animal viruses

    Choose the right combination out of the options given below.

    Solution

    Viroids are the smallest self replicating particles which were discovered by Diener in 1971. Prions were discovered by Prusiner in 1983. Loeffler with Paul Frosch discovered first animal virus in 1989 and Simon Schwender discovered the lichens.

  • Question 2
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    Fine, long threads often with rounded ends made of hyaline ectoplasm are found in some protozoa are

    Solution

    Fine, long threads often with rounded ends made of hyaline ectoplasm found in some protozoa like Radiolaria are Filopodia.

  • Question 3
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    Solation and gelation steps are observed during the movement of

    Solution

    Solation and gelation steps occur in the body of amoeba during its movement. During gelation, plasmasol is converted to plasmagel. During solation, plasmagel is converted into plasmasol.

  • Question 4
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    Zygospore formation during sexual reproduction is seen in

    Solution

    In Rhizopus, during sexual reproduction, a dark zygospore is produced at the point where two compatible mycelia fuse. Upon germination, a zygospore produces colonies that are genetically different from either parent.

  • Question 5
    1 / -0
    Aflatoxins are the carcinogens produced by the species of
    Solution

    Aflatoxins are a type of mycotoxin produced by Aspergillus species of fungi, such as A. flavus and A. parasiticus. It is a potent carcinogen.

  • Question 6
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    The importance of serology in classification of organisms was shown by

    Solution

    Karl Menz showed the importance of serology in taxonomy. He also stated that organisms which are distantly related have different proteins.

  • Question 7
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    Which of the following infectious agent(s) is/are known to cause infection only in plants?

    Solution

    Viroids are the infectious agents, which cause infection only in plants. They cause disease in Pospiviroidae and Avsunviroidae family of plants.

  • Question 8
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    Which of the following sentences is false about archaea?

    Solution

    This is false. Archaebacteria are more closely related to eukaryotes with respect to enzymes for translation and transcription.

  • Question 9
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    Which of the following properties is absent in archaea?

    Solution

    Group archaea does not possess ester-linked lipids. Bacteria possess ester-linked lipids in cell membrane.

  • Question 10
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    Sexual reproduction with meiosis has been directly observed in all fungus except

    Solution

    Sexual reproduction with meiosis has been directly observed in all fungal phyla except Glomeromycota. The sexual reproduction in Glomeromycota differs from plants and animals.

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