BBISE Intermediate (HSSC) Biology (Class XI): syllabus, papers and marking
A 90-mark paper: 80 theory marks (17 MCQs, 13 three-mark and four six-mark questions) plus 10 practical-based marks.
BBISE HSSC-I model papers, published 11 October 2026 · Annual and Second Annual series · grades A++ to U (IBCC scale)
BBISE Inter Biology: where the marks go
BBISE’s HSSC-I Biology model paper (October 2026) is 80 theory marks plus a 10-mark practical-based assessment, 90 in all: 17 MCQs, any 13 of the short questions at 3 marks (39), and four six-mark questions, each with two alternatives of which one is answered (24), in a 3-hour paper.
The model questions cover the mitochondrion and the plasma membrane, water transport in plants, why fungi are not plants and the effect of temperature on a reaction. Marks go on labelled diagrams and exact terminology.
Paper structure and what we mark
| Paper | Time | Marks | Weight | Questions |
|---|---|---|---|---|
| Class XI · Section 1 — Multiple Choice (Class XI) | 3 h (whole paper) | 17 | 18.9% | 17 MCQs, 1 mark each: write the question number and the correct option on the answer script |
| Class XI · Section 2 — Short Answers (Class XI) | — | 39 | 43.3% | Any 13 questions, 3 marks each |
| Class XI · Section 3 — Detailed Answers (Class XI) | — | 24 | 26.7% | Four questions of 6 marks, each with two alternatives (answer one) |
| Class XI · Section 4 — Practical Based Assessment (Class XI) | — | 10 | 11.1% | Any 2 of 3 PBA questions, 2 × 4 marks, plus 2 marks (8 + 2) |
Syllabus outline
- Topics tested in the October 2026 model paper (the board has not posted a unit list):
- Cell organelles and the plasma membrane
- Plant tissues and transport
- Kingdom classification: fungi
- Enzymes and temperature (data interpretation)
How each paper is marked here
- The seventeen MCQs are scored automatically against the key.
- Short answers are marked on the key point; six-mark answers on each stated step.
- The practical-based assessment is separate and not part of our theory marking.
Where BBISE Inter Biology candidates lose marks
- Diagram unlabelled or labelled with the wrong part — Detailed questions on the cell, nephron, heart or reproductive system award marks for the labels. An unlabelled sketch, however neat, scores little.
- Differences written as two separate descriptions — “Differentiate between” needs a point-by-point comparison on the same feature, in two columns or two parallel sentences.
- Process steps in the wrong order — Pathway questions (respiration, photosynthesis, urine formation, protein synthesis) are marked step by step; reversing two steps usually loses both.
- Reasoning questions answered with a definition — Where the paper asks “why” or “how does”, naming the structure and stopping scores zero; the cause or mechanism is the mark.
- Terminology approximated — Keywords such as osmosis versus diffusion, homologous versus analogous or genotype versus phenotype are credited only when used exactly.
Sample papers, mark schemes and marked reports for BBISE Inter Biology
See a real handwritten script marked by eight examiners at admitportfolio.com/examiners.
Questions teachers ask
- Why is there only Class XI?
- BBISE’s October 2026 model papers are published for HSSC-I (Class XI) only; a Class XII layout has not been verified.
- What is the 8 + 2 practical mark?
- Section 4 is a practical-based assessment: two of three questions (8 marks) plus 2 marks, so the paper is 90 marks with 80 theory.
- Is this official BBISE marking?
- No. Balochistan Board of Intermediate and Secondary Education, Quetta marks the real exam. This is examiner-style marking of mocks and homework for BBISE Inter Biology. Only you see the marking, and you decide what reaches the student.
- Do you reproduce past-paper questions?
- No. Every Class XI paper here is original and written to the bbise hssc-i model papers, published 11 october 2026, in the same structure as the real papers shown above.
- Which papers are marked?
- None yet are marked question by question; Class XI · Section 1 are scored instantly. Practical exams sat at the centre are not marked here.
- How is the next paper chosen?
- From the marks a student lost: the concepts behind them are ranked by marks dropped, and the new paper weights those topics. It is the same syllabus and structure, with new questions.
- When are the exams?
- Annual and Second Annual series. Grades A++ to U (IBCC scale).