Sample Online Biology Paper 1

User Rating: 0 / 5

Star InactiveStar InactiveStar InactiveStar InactiveStar Inactive
 
Details
Hits: 16682

Answer all the questions in the spaces provided.

  1. 1. (a) Name the cell organelle found in abundance in the white blood cells. (1 mark)

………………………………………………………………….

(b) Give a reason for your answer in (a) above.                                           (1 mark)

…………………………………………………………………..

  1. c) Name the only epidermal cell in plants to contain chloroplast. ( 1mk)

………………………………………………………………………………….

  1. State two observable features that place a millipede into its Class. (2 marks)

…..……………………………………………………………………………………………………………………………………………………………..…………………………………

  1. Which sets of teeth would be used in chewing sugarcane for maximum extraction of sap?   (2 marks)

……..……………………………………………………………………………………………………………………………………………………………..…………………………………

  1. A group of font two students placed a fresh leaf in warm water. They observed that air bubbles formed on the surface of the leaf.

(a) What biological process were they investigating?                      (1 mark)

………………………………………………….

(b) Name the structures from which the air bubbles were coming from.    (1 mark)

…………………………………………………….

(c) Explain the distribution of the structures named in (b) above on the leaf surfaces of a land plant.               (2mks)

……………………………………………………………………………………………………………………………………………………………..…………………………………

 

 

  1. State why it is important for plants to lose water to the atmosphere. (3 mark)

………..………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..………………………………….…………

  1. The diagram below illustrates tissue fluid and cells surrounding a capillary.

 

 

 

 

 

 

 

 

 

(i) Name fluid G.                                                                                  (1 mark)

………………………………………………………………

(ii) Give two ways by which fluid G is different from tissue fluid.         (2 mark)

……………………………………………………………………………………………………………………………………………………………..………..……

  1. (a) Define respiration.       (1 mark)

……………………………………………………………………………………………………………………………………………………………..……………..

(b) State three activities in the human digestive system that depend on respiration.      (3 mark)

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  1. State three ways in which blood capillaries are structurally adapted to their functions. (3 mks)

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  1. The diagram below represents an organ in a bony fish.

(a) Name the organ.                                                                  (1 mark)

…………………………………………….

(b) Describe how air in water reach the capillaries inside structure B.         (3 mark)

……………………………………………………………………………………………………………………………………………………………..……………………………..……………………………………………………………………

  1. Name two products of respiration in plants. (2 marks)

……………………………………………………………………… ……………………………………………………………………………………..

  1. (a) State one homeostatic role of the human skin. (1 mark)

    ……………………………………………………………………………

(b) Name three structures of the skin essential for its homeostatic function.  (3 mks)

…………………………………………………………………………………………..…………………………………………………………………..…………………………………………………………………………............................

  1. Explain why the nephron is long and convoluted.             (3 marks)

………………………………………………………………………………………………………………………………………………………………………………………….………………………………………………………………

  1. State two limitations of using a quadrat to estimate the population of organisms.  

……………………………………………………………………………………………………………………………………………………………..…………

  1. The diagram below illustrates a germinating seedling.

 

 

 

 

 

 

(a) Name the type of germination illustrated in the diagram.                     (1 mark)

…………………………………………………………..

(b) Describe how the type of germination named in (a) above is brought about.                 (3 mks)

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  1. Explain why a bony fish dies shortly after being removed from water. (4 mark)

……………………………………………………………………………………………………………………………………………………………..…………………………………………………………………………………………………………………………………………………………………………

  1. Julie observed eight onion epidermal cells across the field of view of a light microscope. If the field of view was 4mm in diameter, estimate the average size of the cells in micrometers (1mm= 1000m).  (2 marks)

 

 

 

  1. Explain the role of carbonic anhydrase in red blood cells.      (3 marks)

………………………………………………………………………………………….……………………………………………………………………………………………………..………………………………………………………

  1. State the circulatory system found in members of the class Insecta.  (1 mark)

…………………………………………………………………….

 

     (b) Name the blood vessels that transport blood from:          (2 marks)

  • Small intestine to the liver.

……………………………………….                                                                                                                         

  • Lungs to the heart.

                      ………………………………………..

  1. Name two methods plants employ to remove excretory waste products. 2 mks

…………………………………………………………………….………………………………………………………………………………………………

  1. 5C51 H98 06 + 145 O2 102 CO2 + 98 H2O

           The above equation shows an oxidation reaction of food substances.

 

  1. What do you understand by the term respiratory quotient? (1 mark)

 

……………………………………………………………………………………………………………………………………………………………..…………

 

  1. Calculate the respiratory quotient of the oxidation of food substances. (2 mk)

 

 

 

 

 

  1. Identify the food substances. (1 mark)

………………………………………………………………………………

  1. (a) State two modifications on the kidney nephron of desert mammals.(2 mks)

……………………………………………………………………………………………………………………………………………………………..…………

  1. b) State two structural differences between the veins and arteries. 2 mks

……………………………………………………………………………………………………………………………………………………………..…………

  1. State two ways in which plants with weak stems obtain mechanical support. (2 marks)

……………………………………………………………………………………………………………………………………………………………..…………

  1. What does the term binomial nomenclature mean? (1 marks)

…………………………………………………………………………………

  1. a) Name the hard outer covering of the members of the phylum Arthropoda.   (1mark)

……………………………………………………………………………………

      (b) Name the roles played by the structures named in (a) above.       (1marks)

 

……………………………………………………………………………………

  1. Explain why a camel has a longer nephron than a whale. (1 mark)

………………………………………………………………………………

 

 

  1. Desert kangaroo rats spend most of their time in underground burrows.

(a) Name this type of behavioural activity (1 mark)

…………………………………………………………………………………

(h) Explain the significance of this behaviour to the organism. (3 marks)

……………………………………………………………………………………………………………………………………………………………..…………………………………………………………………………………………

  1. State two advantages terrestrial animals have in excreting urea as their main nitrogenous waste product.        (2 marks)

…………………………………………………………………………………………………………………………………………………………………..……….

27.A process that occurs in plants is represented by the equation.

C6H12O6                     2C2H5OH  +  CO2  +  Energy

  1. Name the above process. (1mark)

…………………………………………………………………………………

  1. State two industrial applications of the above process (2 marks)

…………………………………………………………………………………………………………………

Buy Website Traffic