Secondary 1 Science Life Sciences Quiz

Secondary 1 Science Quiz - Life Sciences

Name: ___________________________
Class: ___________
Date: ___________
Score: ___________ / 40

Duration: 50 minutes
Total Marks: 40

Instructions:

• Answer all 20 questions.
• Section A: Multiple-choice style short answers. Section B: Structured short responses. Section C: Data and diagram interpretation with calculations.
• Write your answers clearly in the spaces provided.
• Use SI units where required.

---

Section A (Questions 1–5) — [10 marks]

1. What is the basic unit of life?
_________________________________ (2 marks)

2. State one function of the cell membrane.
_________________________________ (2 marks)

3. Name the organelle that releases energy from food in a cell.
_________________________________ (2 marks)

4. What gas do plants take in for photosynthesis?
_________________________________ (2 marks)

5. State one difference between plant and animal cells.
_________________________________ (2 marks)

---

Section B (Questions 6–10) — [10 marks]

6. Explain why a cell needs a nucleus.
________________________________________________________ (2 marks)

7. A student observes a leaf under a microscope. State two structures she might see that are found only in plant cells.
(a) _________________________ (1 mark)
(b) _________________________ (1 mark)

8. Describe how you would use a microscope to view a prepared slide of onion cells. List two steps.
(a) _________________________________ (1 mark)
(b) _________________________________ (1 mark)

9. State the energy conversion that happens during photosynthesis.
_________________________________ (2 marks)

10. Give one reason why organisms need to respire.
_________________________________ (2 marks)

---

Section C (Questions 11–20) — [20 marks]

11. The diagram below shows a plant cell.

Generated diagram for Q11.

Label the chloroplast and the vacuole on the diagram. (2 marks)

12. Calculate the actual length of a cell. The image measured 20 mm under the microscope. Eyepiece lens = 10×, objective lens = 40×.
Working: _________________________
Actual length = ___________ mm (2 marks)

13. Based on the table below, state which solution is acidic, neutral, and alkaline using pH values.

Solution	pH
A	3
B	7
C	11

Acidic: ______ Neutral: ______ Alkaline: ______ (3 marks)

14. Explain why a freshwater cell placed in salty water shrinks.
________________________________________________________ (2 marks)

15. A leaf has stomata on its lower surface. State one function of stomata.
_________________________________ (1 mark)

16. The figure shows a simple food chain.

Generated diagram for Q16.

State the producer in this food chain. ___________ (1 mark)

17. From the food chain in Q16, name a primary consumer. ___________ (1 mark)

18. Describe one way bacteria are useful to humans.
_________________________________ (2 marks)

19. State two precautions when using a microscope.
(a) _________________________ (1 mark)
(b) _________________________ (1 mark)

20. A student says: "All cells have a cell wall." Is she correct? Explain.
________________________________________________________ (2 marks)