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Biological Clas...

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  • Question 1
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    The correct condition among the following with reference to sexual reproduction in Rhizopus stolonifer is

  • Question 2
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    The absence of cell wall but the presence of Golgi body and ribosomes in a unicellular organism indicates that it belongs to

  • Question 3
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    In order to attack a host cell

  • Question 4
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    Nucleic acid is absent in __________.

  • Question 5
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    An algal culture is grown and two different species of protozoans A and C are inoculated into the culture which feeds on algae. For the time period during which algae is not acting as a limiting factor, protozoan A reproduces asexually once every hour and protozoan C reproduces one every 1.5 hours. 

    The most likely observation is

  • Question 6
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    Match the following lists.

    List-IList-II
    1. HIVI. Host
    2. PilusII. Prophage
    3. Virus penetrationIII. Retroviridae
    4. LysogenyIV. Polyhedral virus

  • Question 7
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    Study the following lists.

    List-I
    		List-II
    (A) Sex hormone
    		(I) Fertilization in Funaria
    (B) Cell wall breaking enzyme
    		(II) Formation of zygophores in Rhizopus
    (C) Sugary mucilaginous substance
    		(III) Formation of buds in Funaria
    (D) Naturally occurring growth factor
    		(IV) Fertilization of Pteris

    		(V) Conjugation in Spirogyra

  • Question 8
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    Bovine spongiform encephalopathy is a disease caused by prions in 

  • Question 9
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    An example of tumour inducing RNA virus is

  • Question 10
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    Thermus aquaticus is a species of bacteria found living in the hot springs in Yellowstone National Park. Hot springs typically are areas characterized by low oxygen levels, low light levels and high concentrations of sulfur and calcium carbonate.
    In what way do bacteria living in or near hot springs most likely make food?

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