Searchers often ask how many questions are on the HKDSE Biology exam and what score counts as a pass, expecting an answer like a driving test or a professional licensing exam. The real answer is that neither of those exists in the form most people expect, and the actual structure is a Compulsory Part plus an Elective Part, graded on a Level scale.
How many questions are on the HKDSE Biology exam?
The exam is not built around a fixed count of questions the way a multiple-choice licensing test is. HKEAA assesses Biology through a Compulsory Part, sat by every candidate, and an Elective Part, where a school selects two of four elective units for its students. Questions mix multiple-choice items with structured and data-response questions marked on a points scale, so the total number of discrete “questions” is not a single published figure the way total marks or paper structure are.
Is there a pass mark for HKDSE Biology?
No, and this is the detail most searches get wrong. HKEAA does not publish a fixed pass mark for Biology or any other DSE subject. Results are reported on a Level 1 to 5 scale, from 1 up to 5, 5*, and 5** at the top, using standards-referenced grading: examiners set the boundary for each level after that year’s scripts have been marked, based on the quality of work at each level, not a percentage agreed in advance. There is no number to memorise the way there is for a fixed pass/fail licensing exam.
What is the Compulsory Part?
The Compulsory Part covers four topics that every candidate studies, moving from the molecular scale up to whole organisms and ecosystems:
- Molecules of Life and Cells: the chemistry of life, cell organisation, movement of substances across membranes, the cell cycle and cell division, and cellular energetics.
- Genetics and Evolution: basic genetics, molecular genetics, and biodiversity and evolution.
- Organisms and Environment: essential life processes in plants and animals, reproduction, growth and development, coordination and response, homeostasis, and ecosystems.
- Health and Diseases: personal health, diseases, and the body’s defence mechanisms.
What is the Elective Part?
The Elective Part offers four units, and a school teaches two of them, so the pair a candidate actually sits depends on their school’s arrangement rather than a fixed national list:
- Human Physiology: Regulation and Control: osmoregulation, body temperature regulation, blood gas regulation, and hormonal control of the reproductive cycle.
- Applied Ecology: human impact on the environment, pollution control, conservation, and global issues.
- Microorganisms and Humans: microbiology, the use of microorganisms, microbial genetics, and the harmful effects of microorganisms.
- Biotechnology: modern biotechnology techniques, applications of biotechnology, and bioethics.
Because a student cannot know in advance which two electives their school will teach, a revision resource that only covers one or two units leaves a gap. Covering all four means the material lines up with whichever pair a given school has chosen.
How is HKDSE Biology graded if there is no pass mark?
Through the same standards-referenced system used across all DSE subjects. Rather than fixing a score threshold before the exam is sat, examiners review the marked scripts each year and set the mark ranges for Level 1 through Level 5** based on the demonstrated quality of work at each level. That is why the level boundaries can shift slightly from year to year, and why there is no single “pass mark” number a study guide can responsibly quote.
How can I revise for HKDSE Biology without a fixed target to aim for?
Since there is no official pass mark to drill toward, the most useful thing a revision tool can do is cover the full breadth of both the Compulsory Part and all four Elective units, so nothing is missed regardless of which electives a school teaches. The RiverMap Learning DSE Biology app has 540 original practice questions and 320 flashcards across all eight topics, plus a one-page revision note for each topic, in English, Traditional Chinese, and Simplified Chinese with one-tap switching. Rather than simulate a pass/fail mock exam, it tracks topic-by-topic mastery so a student can see exactly which of the eight topics still needs work before the real exam.
Every question is original and written to align with the publicly available HKDSE Biology Curriculum and Assessment Guide (Secondary 4-6), never copied from a past paper, marking scheme, or textbook. The full curriculum guide is published by the Education Bureau at edb.gov.hk. This app is an independent revision aid, not affiliated with or endorsed by the HKEAA, the Education Bureau, or the Curriculum Development Council.