FORM FOUR BIOLOGY NECTA 2017

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL

CERTIFICATE OF SECONDARY EDUCATION EXAMINATION

033/1              BIOLOGY 1

(For Both School and Private Candidates)

Time: 3 Hours                          Wednesday, 01stNovember 2017 a.m.

Instructions

  1. This paper consists of sections A, B and C with a total of thirteen (13) questions.
  2. Answer all questions in sections A and B and one (1) question from section C.
  3. Except for diagrams that must be drawn in pencil, all writing should be in blue or black ink.
  4. Calculators, cellular phones and any unauthorised materials are not allowed in the examination room.
  5. Write your Examination Number on every page of your answer booklet(s).

SECTION A (20 Marks) 

Answer all questions in this section.

1. For each of the items (i) - (x), choose the correct answer among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i)  Goitre is a deficiency disease caused by lack of which element in the diet?

  1.  Carbohydrate 
  2. Iodine 
  3. Vitamin E 
  4. Vitamin C
  5.  Protein.
Choose Answer :


(ii) Tongue rollers in genetics is an example of

  1.  gametogenesis 
  2. continuous variation 
  3. swallowing 
  4. lubricating food 
  5. discontinuous variation.
Choose Answer :


(iii)Which food substance is investigated in the biuret test procedur?

  1.  Carbohydrate 
  2. Lipids 
  3. Protein 
  4. Starch 
  5. Reducing sugar.
Choose Answer :


(iv) The product of anaerobic respiration process in animals is

  1.  lactic acid   
  2. carbondioxide  
  3. alcohol
  4. water  
  5.  oxygen.
Choose Answer :


(v)  A phylum consisting of species with jointed appendages and exoskeleton is known as

  1.  Chordata 
  2. Anelida 
  3. Arthropoda
  4. Platyhelminthesis 
  5. Nematoda.
Choose Answer :


(vi) Which part of the flower receives pollen grain during pollination?

  1.  Petal 
  2. Stigma 
  3. Stamen 
  4. Style 
  5. Ovary.
Choose Answer :


(vii) A rapid growth in plants is mainly taking place in

  1. leaves 
  2. cambium
  3. roots
  4. shoots and root tips 
  5. stem. 
Choose Answer :


(viii) Which of the following is NOT a component of First Aid Kit?

  1. Razor blade 
  2. Panadol 
  3. Bandage 
  4. Soap 
  5. Microscope. 
Choose Answer :


(ix) Which disease spread rapidly as a result of poor waste disposal?

  1. Anemia
  2. AIDS
  3. Cholera
  4. Leukemia
  5. Small pox.
Choose Answer :


(x) A voluntary muscle that is capable of relaxing continuously and do not fatigue easily is known as

  1.  skeletal muscle
  2. biceps
  3. triceps
  4. cardiac muscle
  5. smooth muscle. 
Choose Answer :


2.  Match the phrases in List A with the responses in ListB by writing the letter of the correct response from List B beside the item number of List A in your answer booklet provided.

LIST A LIST B

(i) A disease casued by flatworms known as schistosome.

(ii) A disease caused by a protozoan called trypanosoma.

(iii)A tropical disease caused by plasmodiun.

(iv) A water bone disease casued by entamoeba histolystica.

(v)An outbreak disease caused by vibrio cholerae.

(vi)A sexually transmitted disease caused by bacteria known as treponema palladium.

(vii)A communicable disease casued by salmonella typhii.

(viii) A sexually transmitted disease caused by bacteria known as Neisseria gonorrhoea.

(ix) A viral infection disease caused by HIV.

(x) A disease caused by micobacterium tuberculosis.

  1. Malaria
  2. Syphilis
  3. Bilhazia
  4. AIDS
  5. Dysentery
  6. Gonorrhoea
  7. Typhoid 
  8. Measles
  9. Tuberculosis
  10. Cholera
  11. Trypanosomiasis
  12. Tetanus
  13. Leprosy
  14. Polimyelitis
  15.  Rabies

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 SECTION B (60 Marks)

Answer all questions in this section.

All questions carry 8 marks except question eight (8) and nine (9) which carry 6 marks each.

 3.  (a) Why schools should have a Biology laboratory? Give a reason.

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      (b)  State six laboratory rules.

 

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4.  (a) State two principles of waste disposal.

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(b)  Suggest three proper ways of waste disposal in the community.

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5. (a) (i) What do you understand by the term respiration?

    (ii) Name the two types of respiration.

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(b) Explain how gaseous exchange occurs across the aveolus.

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6.  (a) Differentiate complete dominance from incomplete dominance.

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(b) In a laboratory experiment, tall pea plants were crossed wiht dwarf pea plants. F1 plants    were then selfed to produce F2 generation.

(i) Using appropriate symbols, work out a genetic cross for F 1 generation.   

(ii) Give the phenotypic and genotypic ratio of F1 generation.

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7.(a) Explain the process of fertilization in flowering plants.


Times New Roman,Times,serif;"> (b) Briefly explain how you would identify an insect pollinated flower.
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8. (a) Name three type of muscles found in mammals.

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  (b) Briefly explain how muscles are adapted to their role. Give three points.

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9. (a) List any two types of blood cells.

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(b) Give two differences between arteries and vein. 

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10. (a) With examples, state the meaning of “abiotic” and “biotic” factors of the environment.

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(b) (i) Differentiate the terms “food chain” from a “trophic level”.

(ii) Construct a food chain by using organisms named in the following list: Grass, Bacteria, Lions and Zebra.

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SECTION C (20 Marks) 

Answer one (1) question from this section.

11. Describe the types of macronutrients needed in human body. In each type identify the source and function of food substances in human body.

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12. With the aid of illustrations, discuss the stages of mitosis.

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13. With the aid of a well labelled diagram, describe the structure of bacteria and give three advantages and disadvantages of bacteria in daily life.

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