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Biology Test 12

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Biology Test 12
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Where does Cysticercus larva of Taenia develop in

    Solution

    Cysticercus is the young tapeworm of the genus taenia and it delevops in pig. Thus taenia solium is also known as pork tapeworm.

     

  • Question 2
    4 / -1

    In which of the following an intermediate host is present

    Solution

    Wuchereria bancrofti has two hosts; definitive host (humans) and intermediate host (mosquitoes).

     

  • Question 3
    4 / -1

    W.r.t. the chemical nature of apo-repressor and co-repressor in trp-operon, choose the correct option.

    Solution

    The apo-repressor is a repressor protein that regulates trp operon. The co-repressor in trp-operon is tryptophan that is an amino acid. The apo-repressor is inactive when produced.

     

  • Question 4
    4 / -1

    Choose the incorrect pair amongst the given pairs.

    Solution

    Theory of Abiogenesis was proposed by Aristotle after he observed rotting meat and flies. The theory states that non-living things can be transformed into living things i.e., living organisms were generated from non-living sources. Spallanzani was the one to disprove this theory.

     

  • Question 5
    4 / -1

    The turbinals are of ______ types

    Solution

    The nasal chambers are composed of bones which have projections known as turbinals. These are of three types, nasoturbinals, maxillo turbinals and inferior turbinals.

     

  • Question 6
    4 / -1

    Larynx is the modification of

    Solution

    The larynx is present in the anterior part of the trachea. Thus, larynx is considered as a modification of trachea.

     

  • Question 7
    4 / -1

    Inspiration

    Solution

    Inspiration is an active process. It completes in 2 seconds and inspiration occurs by the construction of respiratory muscles. They are of two types- radial muscles of diaphragm and external intercostals muscles.

     

  • Question 8
    4 / -1

    Which one is correct sequence in glycolysis

    Solution

    Glucose -6-phosphate 
    → 3-phosphoglyceraldehyde 
    → 3-phosphoglyceric acid 
    → phosphoenol pyruvate → pyruvic acid.

     

  • Question 9
    4 / -1

    During absorption of water by roots, the water potential of cell sap is lower than that of

    Solution

    When concentration of outer soil water is more than root hair cell sap, under such condition exosmosis should occur, but is has been seen that water is still absorbed against concentration gradient.

     

  • Question 10
    4 / -1

    The deteriorative processes in plants, that naturally terminate their functional life, are collectively called

    Solution

    Senescence is the sum total of deteriorative process that naturally terminate the functional life of an organism.

     

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