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BIOLOGY PAPER 3 - 2017 MURANG'A MOCK EXAMINATION

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QUESTIONS

  1.  
    1. Carryout food tests for solution Y and X using the reagents provided. (6mks)

      Solution

      Food substance

      Procedure

           Observation

      Conclusion

      Solution X

             

      Solution Y

             
    2. Tie one side of the visking tubing with one of the threads provided. Pour 5ml of solution X in the visking tubing and tie the other end with the remaining piece of thread. Immerse the visking tubing in solution Y in the beaker and leave the set up for 20 minutes. After 20 minutes perform food test using the solution in the visking tubing and solution in the beaker and record your result  in the table below. (3mks)

      Solution

      Food substance

      procedure

      observation

      conclusion

      Solution in visking tubing

             

      Solution in the beaker

             
    3. Which process was being investigated.(1mk)
    4. Account for the results obtained(3mks)
    5. state two importances of the process above in living organisms.(2mk)
  1. Study the diagrams set A1, set E1, set M1 and set B carefully and answer the questions below
    p3q2
    1. State the conditions under which each set up was grown.            (3mks)
      Set A1
      Set E1
      Set B 
    2.  
      1. Name the phenomenon exhibited by seedlings in set E1(1mk)
      2. Give a reason why plants exhibit the phenomenon named in (b) (i) above   (1mk)
    3.  
      1. Name the response exhibited by the seedlings in set B.       (1mk) 
      2. Explain how the response named in (c) (i) above occurred  (2mks)
    4.  
      1. State the type of germination exhibited by seedlings in set A1 and set M1. (2mks)             
        Set A
        Set M1
      2. Give a reason for your answer in (d) (i) above    (2mks)
        Set A1
        Set M1 
    5.  
      1. State the mode of dispersal in set A above when mature. (1 mk)
      2. Name the type of fruit formed by M1 on maturity.     (1 mk)
  1. Study the photographs below and hence answer the questions that follow

    p3q3
    1. To which phylum does organisms x,y and z belong to. (1 mark)
    2. Name the classes to which X, Y and Z belongs to.     (3 marks)
    3. Give two important economic roles of specimen Y.    (2 marks)
    4. Give one harmful effect of specimen X to animals.    (1 mark)
    5. With reasons identify two modes of locomotion of specimen Y. (4 marks) 
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