Tap an answer. It's marked on the spot, with the working. Free, no sign-up.
Want unlimited challenges? Your first full challenge each day is free. After that a Day Pass (KSh 20) or Weekly Pass (KSh 100) unlocks every KCSE paper challenge, quiz and practice paper. You pay once by M-Pesa or card, and it does not auto-renew.
KCSE Biology Paper 1 revision challenge
This challenge covers the topics usually tested in KCSE Biology Paper 1 (231/1): Cell biology, Cell physiology, Nutrition in plants, Nutrition in animals, Transport in animals, Transport in plants, Gaseous exchange, Respiration, Classification. Each question is marked as soon as you answer, with the working. At the end you get your score, your rank, a WhatsApp share and a certificate.
These are original practice questions written by the CBC Guide team at KCSE level, grouped by the topics each paper usually tests. They are not official KNEC papers or predictions of the 2026 papers. Spot an error? Tell us.
Other Biology papers
Biology Paper 2 · Biology Paper 3 (Practical) · Mixed Biology quiz
More: all KCSE paper challenges, KCSE 2026 timetable, KCSE grading guide.
Frequently asked questions
Is this the real KCSE Biology Paper 1?
No. These are original practice questions written by the CBC Guide team at KCSE level, grouped by the topics each paper usually tests. They are not official KNEC papers or predictions of the 2026 papers.
How many questions are in the Biology Paper 1 challenge?
The bank has 17 questions. Each go picks ten at random, so trying again gives you a different mix.
Is the Biology Paper 1 challenge free?
Yes. Your first full challenge each day is free. After that you get a 5-question taste, then a Day Pass (KSh 20) or Weekly Pass (KSh 100) unlocks unlimited challenges.
How is my rank worked out?
Your score is compared with other learners who took the same paper challenge. Join the leaderboard with a nickname to keep your best score.
Before you start, read the KCSE Biology Paper 1 (231/1): Revision Guide and Questions.