How to study Grade 12 Life Sciences (CAPS): papers, topics and a revision plan
Grade 12 Life Sciences is examined in two papers of 2½ hours and 150 marks each: Paper 1 covers reproduction, the nervous system and senses, the endocrine system and plant responses, and Paper 2 covers DNA, meiosis, genetics and evolution.
- Papers
- 2
- Total marks
- 300
- Time per paper
- 2½ hours
How is the Grade 12 Life Sciences exam set out?
Each paper is 2½ hours and 150 marks, split into a 50-mark Section A and a 100-mark Section B.
| Paper | What it covers | Marks | Time | 2026 NSC date |
|---|---|---|---|---|
| Paper 1 | Section A: short answers such as multiple choice, terminology and matching (50 marks). Section B: two questions of 50 marks | 150 | 2½ hours | Friday 13 November 2026, 09:00 |
| Paper 2 | Same layout: Section A (50 marks) and two 50-mark questions in Section B | 150 | 2½ hours | Monday 16 November 2026, 09:00 |
- Cognitive levels: knowledge 40%, comprehension 25%, application 20%, and analysis, synthesis and evaluation 15%.
- Difficulty: 30% easy, 40% moderately challenging, 25% difficult and 5% very difficult for the average learner.
- Both papers assess three aims: knowing the content, doing science and investigations, and applying Life Sciences to everyday life.
Every Grade 12 paper and its start time is on the 2026 matric exam timetable.
What does each Life Sciences paper cover?
Responding to the environment in humans (54 marks) leads Paper 1, and evolution (54 marks) leads Paper 2.
| Paper | Topic | Marks | Share of paper |
|---|---|---|---|
| Paper 1 | Reproduction in vertebrates | 8 | 5% |
| Paper 1 | Human reproduction | 41 | 27% |
| Paper 1 | Responding to the environment (humans) | 54 | 36% |
| Paper 1 | Endocrine system and homeostasis | 34 | 23% |
| Paper 1 | Responding to the environment (plants) | 13 | 9% |
| Paper 2 | DNA: the code of life | 27 | 18% |
| Paper 2 | Meiosis | 21 | 14% |
| Paper 2 | Genetics and inheritance | 48 | 32% |
| Paper 2 | Evolution | 54 | 36% |
- You do not need the names of DNA replication enzymes, or specific codons and anticodons and their amino acids.
- Genetics includes monohybrid, dihybrid and sex-linked crosses, blood groups and pedigree diagrams.
- Revise mitosis from Grade 10: you must be able to tell it apart from meiosis II.
How do I revise each Life Sciences topic on Hlayiso?
Learn the terms and diagrams for each topic from the notes, then practise its questions, including the investigation questions.
As of October 2026, Hlayiso has 574 Grade 12 Life Sciences past papers and memos (276 of them memos), 1 454 past exam questions sorted by topic and 61 note sections, all free to read.
| Topic | How to revise | Practise |
|---|---|---|
| DNA: the code of life | Practise transcription and translation step by step, and reading DNA profiles. | 162 questions |
| Meiosis | Draw each phase and compare meiosis with mitosis in a table. | 116 questions |
| Reproduction in vertebrates | A short topic with 8 guaranteed marks: learn every reproductive strategy and term. | 35 questions |
| Human reproduction | Label the reproductive organs and follow the hormones of the menstrual cycle on a graph. | 174 questions |
| Genetics and inheritance | Write every cross in the full memo format, with genotypes, gametes and offspring ratios. | 252 questions |
| Responding to the environment (humans) | Learn the eye, ear and reflex arc diagrams and the listed disorders. | 249 questions |
| Endocrine system and homeostasis | Explain each negative feedback loop in order, from the stimulus to the response. | 152 questions |
| Responding to the environment (plants) | A 13-mark topic: learn the role of auxins and the plant defence mechanisms. | 66 questions |
| Evolution | Learn one speciation example well and the evidence for human evolution. | 248 questions |
What is a good six-week Life Sciences revision plan?
Split six weeks between Paper 2 topics, Paper 1 topics and full papers, with investigation questions every week.
| Week | Focus |
|---|---|
| Week 1 | Write a recent Paper 1 and Paper 2, mark them with the memo and list weak topics and unknown terms. |
| Week 2 | DNA, meiosis (with mitosis) and genetics crosses, a few every day. |
| Week 3 | Evolution, including human evolution, speciation and biogeography. |
| Week 4 | Human reproduction, reproduction in vertebrates and plant responses. |
| Week 5 | The nervous system, eye, ear, endocrine system and homeostasis. |
| Week 6 | Full papers under timed conditions, starting with November 2025, and one scientific investigation question a day. |
What should I do the night before each Life Sciences paper?
The night before a Life Sciences paper, go over terms and diagrams for that paper only.
- Check whether it is Paper 1 or Paper 2, and the date and 09:00 start time.
- Pack pens, a pencil, a ruler and a calculator: graphs and calculations need them.
- Read your list of terms and check the spelling of each one.
- Redraw two diagrams you find hard (for example the eye or a meiosis phase) from memory.
- Read one scientific investigation question and name its variables, control and how to improve reliability.
- Go to bed at your usual time.
What mistakes do Life Sciences examiners report?
Examiners reported that most candidates knew the content in November 2025 but lost marks when they had to apply it to a new scenario.
- Knowing an example from class, such as incomplete dominance in mice, but not applying it to a new organism.Instead: Practise higher-order questions from past papers, not only recall.
- Scientific investigations answered with memorised responses, or whole sentences copied from the description instead of the variables.Instead: Identify the independent, dependent and controlled variables in every investigation you read.
- Misspelt terms that change the meaning, such as evolution for ovulation or auxin for axon.Instead: Learn the spelling of every term in your glossary.
- Incomplete terms, such as "stem" for stem cells.Instead: Give the full term every time; incomplete answers get no marks.
- Homozygous and heterozygous used to describe phenotypes, and ratios not in their simplest form.Instead: Describe phenotypes by the trait and simplify every ratio.
- Graphs drawn without a ruler and units given only in the final answer of a calculation.Instead: Bring a ruler and calculator, and write the unit in each step.
- Weak answers on meiosis, DNA profiling, human evolution, speciation and biogeography.Instead: Give these topics a full session each in your plan.
Common questions about Grade 12 Life Sciences
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When are the 2026 Grade 12 Life Sciences papers written?
The DBE timetable sets Life Sciences Paper 1 for Friday 13 November 2026 and Paper 2 for Monday 16 November 2026. Both start at 09:00 and last 2½ hours.
How many marks is each Life Sciences paper?
Each paper is worth 150 marks: 50 marks in Section A and two 50-mark questions in Section B. Each paper lasts 2½ hours.
Which Life Sciences topics carry the most marks?
Responding to the environment in humans (54 marks) in Paper 1, and evolution (54 marks) and genetics and inheritance (48 marks) in Paper 2.
What was the Grade 12 Life Sciences pass rate in 2025?
Of the 382 379 candidates who wrote Life Sciences in November 2025, 83.4% achieved 30% or more and 63.8% achieved 40% or more (DBE 2025 Diagnostic Report).
Do I need to learn the names of codons and enzymes?
No. The 2021 Examination Guidelines say the names of DNA replication enzymes and of specific codons, anticodons and their amino acids do not have to be memorised.
Sources
The facts in this guide come from these Department of Basic Education documents.
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