Student's Assessment Number.........

THE UNITED REPUBLIC OF TANZANIA  NATIONAL EXAMINATIONS COUNCIL OF TANZANIA  FORM TWO NATIONAL ASSESSMENT

033 BIOLOGY

Time 2:30 Hours Year : 2021

Instructions

1. This paper consists of sections A, B and C with a total of eleven (l 1) questions.
2. Answer all questions in sections A and B and one (1) question from section C.
3. Section A carries thirty (30) marks, Section B fifty (50) marks and section C carries twenty (20) marks.
4. All writing must be in blue or black ink except drawing which must be in pencil.
5. Cellular phones and any unauthorised materials are not allowed in the assessment room.
6. Write your Assessment Number at the top right corner of every page.

SECTION A (30 Marks)

Answer all questions in this section.

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

(i)Scurvy is a nutritional deficiency disease due to lack of

1. vitamin C in the diet.
2. mineral salt in the diet.
3. vitamin B₁₂ in the diet. 
4. vitamin D in the diet.

(ii) Substances going in and out of the cell are controlled by

1. cytoplasm. 
2. cell membrane.
3. vacuole. 
4. tonoplast.

(iii) Which of the following step is not involved in scientific investigations?

1. Problem identification 
2. Asking question
3. Formulating hypothesis 
4. Solving questions

(iv) A parasite that causes malaria is known as

1. Schistosoma. 
2. Plasmodium.
3. Mosquito. 
4. Amoeba.

(v) The process whereby carbon dioxide passes from blood into alveoli of lungs is called

1. osmosis. 
2. respiration.
3. diffusion. 
4. breathing.

(vi) A component of the blood which is responsible for blood doting is known as

1. albumin. 
2. haemoglobin.
3. leucocytes. 
4. fibrinogen.

(vii) Why rabbit is called a primary consumer?

1. It feeds on animals 
2. It feeds on plants
3. It feeds on bacteria 
4. It feeds on fungi

(viii) If you are asked to prepare a First Aid Kit with its following will not be included?

1. Iodine tincture
2. Medicine to cure diseases
3. Pair of scissors 
4. Sterilized cotton wool

(ix) The following organisms belongs to Kingdom Fungi

1. Mucor, Mushroom, Yeast
2. Moss, Mucor, Yeast
3. Euglena, Mushroom, Mucor
4. Liverworts, Mushroom, Mucor

(x) Which of the following is a risky behaviour?

1. Accepting favours and gifts from parents
2. Having many sexual partners
3. Keeping good company and avoiding immoral friends
4. Shaking hands with HIV/AIDS infected individuals