THE CELL FORM 1 QUESTIONS AND ANSWERS


1.    1995 Q2 P1
     Name the organelle that performs each of the following functions in a cell      (2 marks)
            Proteins synthesis…………………………………
            Transport of cell secretions………………………

2.     1996 Q8 P1

3.    1997 Q1 P1
     State the functions of the following cell organelles                                           (2 marks)
a)      Golgi  apparatus
b)      Ribosomes

4.     1998 Q3 P1
            Which organelle would be abundant in:                                                            (2 marks)
         Skeletal muscle cell
         Palisade cell

5.    2001 Q7 P1
            Name the organelle in which protein synthesis takes place                               (1 mark)
                       
6.     2004 Q7 P1

7.     2007 Q2 P1
           (a) What is the formula for calculating linear magnification of a specimen when
                 using a hand lens?                                                                                         (1 mark)
           (b) Give a reason why staining is necessary when preparing specimens for
                 observation under the microscope                                                                (1 mark)

8.      2007 Q3 P1
            Plant cells do not burst when immersed in distilled water. Explain                 (2 marks)

9.      2007 Q4 P1
            State three functions of Golgi apparatus                                                          (3 marks)

10.    2008 Q12 P1
            State two functions of the endoplasmic reticulum                                            (2 marks)

11.    2009 Q3 P1
12.    2009 Q7 P1



13.    2009 Q15 P1

14.    2009 Q26 P1

15.    2010 Q3 P1
      State the function of:
a)      Ribosomes                                                                                                 (1 mark)
b)      Lysosomes                                                                                                 (1 mark)

16.    2010 Q4 P1
             The diagram below shows a specialized plant cell.
                     



a)       i) Name the cell                                                                                       (1 mark)
ii) Name the parts labeled D and E.                                                          (2 marks)

b)   state the function of the part labeled C.                                                      (1 mark)

17.    2010 Q9 P1
       State two ways in which chloroplasts are adapted to their functions.           (2 marks)

18.     2011 Q11 P1

19.    2011 Q15 P1
             Give reasons for carrying out the following procedures when preparing temporary wet
             mounts of plant tissues.
              a) Making thin plant sections                                                                        (1 mark)
              b) Adding water on the plant section.                                                            (1 mark)
              c) Placing a cover slip over the plant section.                                               (1 mark)


20.     2012 Q3 P1
The figure below is a fine structure of a generalised animal cell as seen under an electron microscope.
                    

(a)   Name the parts labelled A and B                                                                 (2 marks)
(b)   How is the structure labelled B adapted to its functions                              (2 marks)

21.   2012 Q12 P1
(a) Name the part of a light microscope used to bring an image of a specimen into sharp
      focus.                                                                                                                 (1 mark)
(b) Why is it recommended to keep the stage of the microscope dry?                        (1mark)

22.        2012 Q27, 30 P1
       What is the function of contractile vacuoles in amoeba?                                        (1 mark)

23.       2012 Q30 P1
            Name the organelle that is involved in each of the following:                         (2 marks)
(a)    Manufacture of lipids
(b)    Formation of Lysosomes

24.        2013 Q6 P1
Using a microscope, a student counted 55 cells across a field of view whose diameter was 6000µm. Calculate the average length of the cells. Show your working.                                                                                                      (2 marks)

25.          2013 Q6 P1

26.              2014 Q7 P1
A student drew a 6mm long diagram of a plant flower. If the actual length of the flower was 12cm, calculate the magnification of the drawing made by the student. Show your working.                                                                                         (2 marks)                                                                                                                                                                                         
27.              2014 Q20 P1
             State one function of each of the following cell organelles:
              a) Golgi bodies                                                                                                    (1 mark)
              b) Lysosomes.                                                                                                       (1 mark)
THE CELL
MARKING SCHEME
1.       1995 Q2 P1
              Protein synthesis – Ribosomes
        Transport of cell secretions – Endoplasmic reticulum

2.        1996 Q8 P1
                     Store chemical salts/sugar/blood/; maintain shape  of cell.  Osmotic gradient bring
                     about movement of water.

3.        1997 Q1 P1
                  (a) Golgi apparatus
Packaging of synthesized materials; Accept correctly named materials e.g   glycoproteins

(b)       Ribosomes
                   Transport of the packed materials, secretion of packed materials;
                   Manufacture / synthesis of proteins.

4.       1998 Q3 P1
           Skeletal muscle cell-  Mitochondria
     Palisade cell           - Chloroplasts

5.        2001 Q7 P1
– Ribosomes

6.        2004 Q7 P1
                   a) Stores hydrolytic enzymes for destruction of worn out organelles / cells / tissues /
                         digestion of bacteria. / pathogens;
                          Acc. Digestion of food / accept autolysis.

b) Processing / packaging synthesized cell materials and transporting of  packaged  cell
      materials;.
                        Production of lysosomes/ secretions of packaged material;

7.       2007 Q2 P1
                    (a) Drawing Linear            =          length of the drawing
                          magnification                           Length of the object

        (b) It is adding a dye to the specimen to make the feature clearer and distinguishable.

8.          2007 Q3 P1
Plant cells have membrane and cell wall. When the cell is placed or immersed in distilled water, the water is absorbed by osmosis. As cell becomes turgid, the cell creates an inward force, wall pressure that prevents the cell from bursting.

9.        2007 Q4 P1
                    From vesicles that transport materials to other parts of the cell e.g  proteins.
-  Transportation of secretions to the cell surface for secretion e.g. enzymes and mucus
              -  They form Lysosomes

10.         2008 Q12 P1
                       - Transport of protein
                       - Synthesis/ transport of lipids/ steroids
                       - Site for attachment for ribosome.


11.      2009 Q3 P1
                     (a) Magnification of the object/ image
                                    Acc: Magnification alone
                     (b) Regulates amount of light (falling on the object on microscope);
                                   Acc: adjust/control amount of light

12.       2009 Q7 P1
                     (a)  Site for protein synthesis     Ref: Aurolysis
                             NB: Must mention effects of lytic enzymes
                     (b)  Break down worn out cells / organelles / food materials

13.        2009 Q15 P1
                        Cytoplasmic streaming ; /Acc: Cyclosis for cytoplasmic streaming

14.       2009 Q26 P1
Inner membrane is highly folded / have cristae to provide a large surface area; / for attachment of respiratory enzyme.

15.       2010 Q3 P1
                (a) Protein synthesis (Accept: site for protein symbiosis)
                (b) Destroys worn out organelles/cells/tissues
                      Destroys micro-organisms.

16.       2010 Q4 P1
 (a)  i) Root hair(cell)
       ii) D – cell wall
            E – cell sap (vacuole)
  (b) Controls the functioning of the cell/ controls cell activities

17.      2010 Q9 P1
-       They contain chlorophyll which traps/absorb light (energy)
-       They have grana which increase surface area for accommodation of a large number of chlorophyll molecules for photosynthesis
-       The stoma has enzymes for photosynthesis

18.      2011 Q11 P1
-          Moves the body tube through smaller distances to bring the image specimen/object into sharper focus;
-          Platform where specimen (on slide) is placed.                                       

19.       2011 Q15 P1
-          To reduce layers of cells to allow light to pass though;                           
-          To make the cells turgid / prevent drying up;                                        
-          To protect the lens on the objective                                                       

20.        2012 Q3 P1
                (a)  A Nucleopore/ Nuclear pore;
                     B  Rough endoplasmic reticulum
                (b) Surface area covered with ribosomes;for protein synthesis/channels for
                     transport of proteins.     NB: Tied to (a) structure to function

21.         2012 Q12 P1
                  (a) Fine adjustment knob 
                  (b) Avoid refraction of light; prevent wetting of the stage


22.         2012 Q27 P1
                       Removes excess water/waste products/homeostasis/osmoregulation/excretion

23.         2012 Q30 P1
                         (a) manufacture of lipids- smooth endoplasmic reticulum
                         (b) formation of lysosomes – golgi bodies/golgi apparatus

24.         2013 Q6 P1
Length of cell = diameter of the field of view(um)
                                     number of cells
     
                      
25.         2013 Q9 P1
                   (a)
·      Has many extensions i.e. dendrites, axons and dendron, that receive and send impulses from one part of the body to another.
·      has myelin sheath or medullated sheath which a fatty sheath that encloses the axon hence insulate the axon and impulses.
·      has Schwann cell that are in close contact with axon and they secrete the myelin sheath.
·      myelin sheath has constrictions at intervals - called nodes of Ranvier to propagate the nerve impulse and speed up the transmissions of an impulse.

     (b) i • inner membrane is greatly folded to form cristae which increase surface area for   
               respiratory activity
   matrix contains enzymes that catalyzes rate of reaction.

26.        2014 Q7 P1
               
                      Drawing length in cm
                    Object length in cm
                    6cm /12 cm  = x0.5


27.       2014 Q20 P1

                a) Golgi bodies                                                                                          
- Formation of lysosomes
- Transport of lipids around the cell
- Packing of substances proteins for secretion.

             b) Lysosomes.                                                                                           
-Breakdown large molecules / digestions of foods
-Destroy worn out organelles or cells
Acc. Tissues or organelles



Comments

  1. I love your good work
    Well done PIVOT guys
    God bless you

    ReplyDelete

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