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CSEE

Biology · Paper 1 · 2022

18 questions 🇹🇿 NECTA ✓ Official NECTA answers

CSEE 🇹🇿 NECTA ✓ Official NECTA answers

Biology · Paper 1 · 2022

18 questions

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Questions (18)

Section A

1. 1 mark

Which of the following structures are found in both plant and animal cells?

A. Chloroplast, cell wall and cell membrane

B. Cell membrane, nucleus and cytoplasm

C. Vacuole, cell membrane and cell wall

D. Cell wall, chloroplast and vacuole

E. Chloroplast, nucleus and cell wall

2. 5 marks

Match the uses of apparatuses in List A with the corresponding apparatuses in List B by writing the letter of the correct response beside the item number in the answer booklet provided. List B

List A	List B
(i) An apparatus used for heating substance in the laboratory.	A Bunsen burner
(ii) An apparatus used for storing test tubes so that they do not roll or break.	B Aquarium
(iii) An apparatus used for measuring volume of liquids.	C Measuring cylinder
(iv) An apparatus used to magnify specimens.	D Hand lens
(v) An apparatus used for keeping live aquatic animals in the laboratory.	E Spatula
	F Test tube rack
	G Filter funnel
	H Test tube holder

(i) An apparatus used for heating substance in the laboratory. 1 mk

(ii) An apparatus used for storing test tubes so that they do not roll or break. 1 mk

(iii) An apparatus used for measuring volume of liquids. 1 mk

(iv) An apparatus used to magnify specimens. 1 mk

(v) An apparatus used for keeping live aquatic animals in the laboratory. 1 mk

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6. 1 mark

In natural selection, which types of characteristics are affected?

A. Inherited

B. Acquired

C. Survived

D. Dominant

E. Recessive

7. 1 mark

Which process allows absorption of water and mineral salts from the soil in plants?

A. Diffusion

B. Osmosis

C. Irritability

D. Mass flow

E. Regulation

9. 1 mark

Straightening and bending of the arm involve contraction of the biceps and triceps muscles. Which of the following alternatives describes the state of these muscles when the human arm is bent?

A. Biceps muscles contract while triceps relax

B. Triceps muscles contract while biceps relax

C. Both the biceps and triceps muscles relax

D. Biceps muscles relax while triceps contract

E. Both biceps and triceps muscles contract

Section B

3. 6 marks

"Animals cannot survive without moving from one place to another." Justify this statement by giving three points with one example in each.

(none) Point 3 with example 2 mk

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4. 3 marks

Mr. Shamba got a car accident and was badly injured. During the First Aid process Mr. Sai put on gloves, took a cotton wool and gave him painkillers. What was the use of-

(a) What was the use of gloves? 1 mk

(a) gloves? 1 mk

(b) cotton wool? 1 mk

(b) What was the use of cotton wool? 1 mk

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5. 8 marks

How is the human urinary system adapted to perform its roles effectively? Give four points. (c1) If the heart continues to contract forcefully, which of the following will happen to the arteries? (a) Their walls will stretch (b) Their walls will constrict (c) Their walls will relax (d) Their walls will remain unchanged. Explain your answer. (a) Cells are transmitted from one.

(none) Four adaptations of the human urinary system for effective role performance. 4 mk

(c1) If the heart continues to contract forcefully, which of the following will happen to the arteries? (a) Their walls will stretch (b) Their walls will constrict (c) Their walls will relax (d) Their walls will remain unchanged. Explain your answer. 3 mk

(c2) List four types of diseases that are transmitted from one person to another. 4 mk

(a) Cells are transmitted from one. 1 mk

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Section C

13. 15 marks

Explain four family planning methods and indicate one disadvantage of each.

(a) gloves? 1 mk

(none) Explain four family planning methods and indicate one disadvantage of each. 15 mk

(b) cotton wool? 1 mk

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14. 10 marks

Why is it important for plants to carryout photosynthesis? Explain by giving four reasons.

(none) Why is it important for plants to carryout photosynthesis? Explain by giving four reasons. 10 mk

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15. 10 marks

15. e M ra a d n i . y c a p te e o th p e le m . b e G . l i 1 . e v v 1 . n e g t e h x a a t m in p s l e e c s t , s e x a p re l a , h . in a r f _ m o u fu r l w t a o y s m 1 . 1 a 1 n w h hi e . c ri h c e . m t s h e e c y ts f , a i i n ·e d u p se o t i · ' u s o 1 n t o o u m s a n c . h em . t eals to

(a) Which components control the flow of blood into the heart? 2 mk

(none) e M ra a d n i . y c a p te e o th p e le m . b e G . l i 1 . e v v 1 . n e g t e h x a a t m in p s l e e c s t , s e x a p re l a , h . in a r f _ m o u fu r l w t a o y s m 1 . 1 a 1 n w h hi e . c ri h c e . m t s h e e c y ts f , a i i n ·e d u p se o t i · ' u s o 1 n t o o u m s a n c . h em . t eals to 10 mk

(b) Which components control the flow of blood out of the heart? 2 mk

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