Biology mock exam
Higher School Certificate Examination - Biology. Sit it in one block, time yourself with the on-screen clock, then self-mark against the model answers.
Paper structure from the official NESA page.
Want the real thing? Open the 2025 Biology paper walkthrough for the official structure and marking criteria.
Paper at a glance
| Section | Questions | Marks | Recommended time |
|---|---|---|---|
| Section I - Objective response | 20 | 20 | 35 min |
| Section II - Short answer and extended response | 19 | 79 | 145 min |
The official paper is worth 100 marks. This mock holds 99, because we only use questions we have checked and they don't fill every section of the official paper exactly. Your score is worked out of the marks in the questions you sit, so a perfect paper scores 100%.
Before you start
Real questions from past HSC papers, with the official marking guidance in the self-mark stage.
What this mock covers
- Section I - Objective response: 20 multiple-choice questions, auto-marked when you submit.
- Section II - Short answer and extended response: 19 short-answer questions (79 marks), self-marked against a model answer.
Real past-paper questions from the 2020 HSC, 2021 HSC, 2022 HSC, 2023 HSC, 2024 HSC, 2025 HSC papers, with the official answer key.
17 syllabus dot points covered
Syllabus dot points examined in this paper:
- Adaptive immune response, humoral and cell-mediated immunity: HSC Biology Module 7
- Antivirals, antibiotics, resistance and immunisation: HSC Biology Module 7
- Biotechnology applications in agriculture, medicine and industry: HSC Biology Module 6
- Causes of infectious disease and pathogen types: HSC Biology Module 7
- DNA replication explained: HSC Biology Module 5
- Effects of biotechnology on biodiversity: HSC Biology Module 6
- Effects of mutation on amino acid sequence: coding vs non-coding DNA: HSC Biology Module 6
- Epidemiology: incidence, prevalence, mortality and study designs: HSC Biology Module 8
- Homeostasis, feedback, thermoregulation and osmoregulation: HSC Biology Module 8
- Local, regional and global strategies to limit disease spread: HSC Biology Module 7
- Meiosis and gamete formation explained: HSC Biology Module 5
- Mutation, gamete variation and the source of new alleles: HSC Biology Module 6
- Pedigree analysis for mutations: HSC Biology Module 6
- Punnett squares and Mendelian inheritance: HSC Biology Module 5
- Recombinant DNA, CRISPR, whole genome sequencing and gene therapy: HSC Biology Module 6
- Technologies for hearing and vision disorders: HSC Biology Module 8
- Transcription and translation explained: HSC Biology Module 5
Multiple-choice questions are drawn from the Exam-style practice (harder): Biology multiple choice, Heredity and genetics (Modules 5 and 6), Infectious and non-infectious disease (Modules 7 and 8) quizzes.
Your answers, the clock and your self-marks save on this device as you go, so a reload picks up where you left off.