G10 BIO OPENER TERM 3 2026
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OPENER GRADE 10 TERM 3 HIST & CITIZENSHIP
G10 AGR OPENER TERM 3 2026
OPENER ENGLISH GRADE 10 MARKING SCHEME
GRADE 10 BIOLOGY SBA 1783318448 2026KNEC SBA
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Word Editable SampleBIOLOGY GRADE 10
OPENER EXAM TERM 3 2026
TIME: 2 HOURS
NAME………………………………ADM NO…………………………
DATE…………………………………SIGN……………………………
INSTRUCTIONS TO CANDIDATES
• Answer ALL questions.
• Write your answers clearly in the spaces provided or on the answer sheets as instructed by your teacher.
• Show all working in calculation questions. Unsupported final answers may not earn full marks.
1a) State two ways in which the study of Biology contributes to improvement of human health. (2 marks)
b) A learner investigates the effect of temperature on the activity of an enzyme. State:
i. the independent variable; (1 mark)
ii. the dependent variable; (1 mark)
iii. one variable that should be controlled. (1 mark)
c) The learner records the following times taken for a reaction to reach the same end point: 20°C = 80 s; 30°C = 50 s; 40°C = 25 s; 50°C = 40 s.
i. Calculate the percentage decrease in reaction time from 20°C to 40°C. Show working. (2 marks)
| Condition | Pulse rate (beats/min) |
|---|---|
| Before exercise | 72 |
| Immediately after 5 min exercise | 128 |
| After 5 min rest | 96 |
| After 10 min rest | 78 |
This document is professionally prepared and verified for Grade 10 (Senior Secondary) • Term 3.
- Competency-driven teacher inquiry models
- Guiding questions for active learner engagement
- Real-life problem-solving applications
- Formative & summative assessment indicators
- Performance levels (Exceeding, Meeting, Approaching)
- Practical assessment task breakdowns