FORM TWO PRE- MOCK EXAMINATIONS

BIOLOGY

GOLDEN SECONDARY SCHOOL – EXTERNAL EXAMINATION

 

 

TIME: 2:30HRS

Instructions:

  • This paper consists of sections A, B and C.
  • Answer all questions from sections A and B and ONE question from section C.
  • All Answer for section A and B must be written in the space provided for each question answer for section C should be written in paper provided.
  • Write your examination number on the top right hand corner of every page.
  • All writing must be in blue or black ink.
  • Cellular phones are not allowed in the examination room.

     


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SECTION A (30 MARKS)

Answer all questions from this section

 

  1. Question (i)-(x) are multiple choice items select the best answer in each case and write its letter in the box provided.

     

    1. Which of the following organelles is involved in respiration
      1. Nucleus
      2. Cell membrane
      3. Mitochondria
      4. Lysosome
      5. Chloroplast

         

    2. One of the following is not a part of microscope
      1. Eye piece
      2. Stage
      3. Light
      4. Mirror
      5. Stage

         

    3. Gaseous exchange in human lungs occur in the;
      1. Alveoli
      2. Mouth
      3. Trachea
      4. Bronchioles
      5. Nasal cavity

         

    4. Which of the following part transports water within a plant?
      1. Cambium
      2. Xylem
      3. Epidermis
      4. Phloem
      5. Pith

         

    5. The following group of organisms belongs to the same kingdom
      1. Bat,whale ,amoeba
      2. Grasshopper, bat,fish
      3. Euglena,yeast,liverwort
      4. Amoeba,Housefl,mosquito
      5. Paramecium,bat,moss

         

    6. HIV/AIDS can results from the following behavior
      1. Abstaining from sex and use condoms
      2. Rape, alcoholism and drug abuse
      3. Faithfulness in marriage
      4. Avoiding multiple partiners
      5. Using contraceptive pills

         

    7. A food sample B turned blue black when iodine solution was added onto it the conclusion is that the sample B contained;
      1. Non reducing sugar
      2. Starch
      3. Reducing sugar
      4. Protein
      5. Lipids

         

    8. Apatient having blood group B can receive blood of a donor with blood group
      1. B only
      2. AB only
      3. O only
      4. B or O
      5. B or AB

         

    9. Which of the following does not secrete digestive enzymes?
      1. Oesophagus
      2. Pancreases
      3. Stomach
      4. Salivary gland
      5. Ileum

         

    10. The body is protected against pathogens by
      1. Bone marrow
      2. Erythrocytes
      3. Thrombocytes
      4. Lymp
      5. Leucocytes

         

         

  2. The following statement are either TRUE or FALSE in the space provided write TRUE if the statementis correct and write False if the statement is incorrect.

     

    1. During aerobic respiration oxygen is given out. ……………
    2. All living cell contain chloroplast. …………….
    3. A microscope is an instrument that is used in scientific studies to magnify very small specimens. …………
    4. Root hairs increases the surface area for water absorption. …………
    5. Sharing of towels can spread STIs. ……………
    6. Malaria is caused by a female anopheles mosquito. ……………
    7. Inhaled air contains higher volume of carbon dioxide than exhaled air. ………….
    8. The structure which prevents the entrance of food and water into the trachea is called a villus. …………
    9. The best way to dispose sewage is by an incineration. ……………
    10. Some laboratory accidents can be avoided by reading warning signson chemical containers. …………
  3. Match the phrase in list A with response in list B by writing the letter of the correct response from list B below the item number of list A in the table provided.

LIST A

LIST B

  1. Carry blood away from the heart.
  2. A viral disease transmitted through sexual intercourse.
  3. A disease caused by lack of properhygien and victim had a stool of rice-water coloration.
  4. A disease transmitted through sexual intercourse and treated by antibiotics.
  5. A disease characterized by fever and coughing up blood sputum.
  1. Cholera
  2. Typhoid
  3. AIDS
  4. Arteries
  5. Syphilis
  6. Schistosoma
  7. Tuberculosis
  8. Veins
  9. Malaria
  10. Vena cava

 

ANSWER

LIST A

(i)

(ii)

(iii)

(iv)

(v)

LIST B

         

 

  1. Complete each of the following statements by writing the correct answer in the space provided in

    each item number of question.

    1. A leaf-structure found in bryophytes only is knows…………………………………………..
    2. Young leaves found in ferns are coiled and they are called …………………………………..
    3. In division Bryophyta, members have male gametes known as ………………………………
    4. Bryophytes have root-like structure called rhizoids used for …………………………………
    5. Most members of kingdom plantae store food inform of ……………………………………..

     

    SECTION B (50 Marks)

    Answer ALLquestions from this section

     

  2. If the body does not get enough of any of the food substance a certain disorders occur such disorders are generally called deficiency diseases.

(a) Complete the table below

Food substance lacking in the diet

Deficiency diseases

Calcium

(i)…………………………………………

(ii) …………………………………………….

Night blindness

VitaminB1

(iii)…………………………………………

Iodine

(iv)………………………………………….

Iron

(v)………………………………………….

(vi)……………………………………………

Pellagra

Vitamin D

(vii) …………………………………………

 

(b) Name three elements that form carbohydrates

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

 

 

 

 

 

 

 

  1. Study the food wed below then answer the questions that follow:





 


 

 

 

a) i) From the above food web which one is the producer.

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

ii) Mention organisms which are primary consumers.

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

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

b) From the food web given above construct three food chain.

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

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

c) Outline three importance of the natural environment.

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

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

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

 

  1. A biologist collected a blood sample from athlete at intervals to determine the amount of lactic acids accumulation the following were the results obtained.

TIME IN MINUTES

CONCENTRATION OF LACTIC ACIDS

(Mg/100cm3)

0

4

8

12

16

20

40

60

3

28

50

40

30

26

8

3

 

Study the table above then answer the questions that follows:

  1. Name the process which leads to the accumulation of lactic acid.

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

(ii)    In which animal tissue lactic acid is found?

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

(iii)    What is the effect of accumulation of lactic acid in the body?

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

(iv)    From the data obtained in the table above which range of time represent the period of recovery.

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

 

 

 

(v)    Write a word question for the process mentioned in 7(i) above in plant.

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

 

  1. (a) Outline four (4) differences between plant cells and animal cells.

PLANT CELLS

ANIMAL CELL

 


 

 


 

 


 

 


 

 

(b) (i) What is first aid?

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

(ii) List four components of first aid kit.

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

(iii) Brief explain the procedure of giving First Aid to a victim of fainting.

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

 

  1. (a)Differentiate between the following:

(i) Gaseous exchange and respiration.

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

(ii)Osmosis and diffusion.

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

(b)Draw a well labeled diagram of a generalized plant cell seen under light microscope.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (a) Distinguish between disease and infection.

Disease

Infection

 

………………………………………………

………………………………………………

………………………………………………

 

…………………………………………………

…………………………………………………

…………………………………………………

 

(b)Mention three ways in which disease inter in the body of organism.

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

(c)Outline four factors affecting the body immunity of an individual.

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

 

 

 

 

 

SECTION C (20MARKS)

Answer one (1) question from this section

 

  1. The diagram in figure 2 is alimentary canal of human being. Study the diagram and answer the questions that follow:


     

    1. Name the parts labeled 1 – 10.

      1…………………………………..……….. 2. ……………….……………………………..

      3………………………………………..….4. ……………………………..……………….

      5…………………………………………… 6. ………………………………………………

      7……………………………………………8.………………………………………………

      9……………………………………………10………………………………………………..

      1. Name four (4) components digestive juice produced in the organ labeled 8.

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

      2. State four (4) adaptations of the structure labeled 4 which make it suitable for absorption of digested food.

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

      3. What are the role(s) of tongue in digestive system?

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

         

  2. By considering internal and external factors affecting transpiration, write an essay on transpiration

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

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