Higher Human Biology grade boundaries 2026: A, B, C, D

Higher Human Biology grade boundaries 2026

The table is the Human Biology row of the Higher sheet in Grade boundaries 2026 (release 26GB, 4 August 2026); the counts are from the 2026 course report.

Among the Higher courses we cover, only Human Biology lands on 70%, 60%, 50% and 40%, and its C of 75 is 4 marks above 2025's 71. See the Higher Human Biology guide.

What the 150 marks are made of

The two papers, 25 multiple-choice marks in 40 minutes and 95 marks in 2 hours 20 minutes, carry 80% of the 150 marks. The assignment, 20 marks scaled to 30, carries 20%. The 2026 course report carries a note that the course assessment changes from session 2026 to 2027, and the improving assessment paper describes the new format as a single paper of 20 plus 80 marks, so 2026 is the last year on this one.

How many candidates got each grade in 2026

30.3% of candidates, 2,239, got an A, up from 26.2%, and 14.8%, 1,095 candidates, got No Award, up from 13.5%. B was 20.2%, C 19.4% and D 15.4%. Entries were 7,399, up from 7,318.

Turning a mark into a grade

A candidate with 20 on Paper 1, 70 on Paper 2 and 10 out of 20 on the assignment, which becomes 15, has 105. That is exactly the A boundary, so it is an A. It is also 22 short of the upper A boundary of 127.

Check the lines against the formulas. A is 105 and C is 75, so the gap is 30. B = 75 + ⌊61 ÷ 4⌋ = 75 + 15 = 90, and D = 75 − ⌈59 ÷ 4⌉ = 75 − 15 = 60. These are exactly 60% and 40% of 150.

2026 against earlier years

All four lines rose from 2025: A by 1 (104 to 105), B by 3 (87 to 90), C by 4 (71 to 75) and D by 6 (54 to 60). Over three series C went 68, 71, 75 and D 51, 54, 60. The C boundary was 47.3% in 2025 and is 50.0% now, and D rose from 36.0% to 40.0%.

What Qualifications Scotland said about the 2026 papers

The report says Paper 1, Paper 2 and the assignment all performed as expected, and it does not mention any question that was more or less demanding than intended. That fits boundaries that sit exactly on the 70, 60, 50 and 40 per cent marks.

The marks lost, from Paper 2: many candidates omitted nucleotides when describing how mRNA is produced (question 2(b)), many missed the folding or single-stranded nature of tRNA (2(c)), many did not say "less oxygen for" in the lactate question (3(c)), and many did not state the removal of hydrogen ions and electrons in the role of pyruvate dehydrogenase (4(b)). Many focused on the structure of fast twitch fibres, not their contraction speed (5(b)(i)). Many described the flow of blood through the heart when asked what caused the heart sounds (10(b)(ii)). Many said the stretch and recoil of a vessel was only to withstand high pressure, not to accommodate the surge of blood (7(c)(ii)), and many named elastic fibres where smooth muscle was meant for vasoconstriction and vasodilation (7(d)). The report adds that many candidates restate results instead of drawing a conclusion, and that candidates answered less well on topics not in recent past papers.

What the 2026 numbers mean for you

Because the lines sit on the notional marks, 105 for an A is a straightforward 70%. The report's lost marks are precise-wording points: say what each enzyme removes, say that fast twitch fibres are useful because they contract quickly, state what causes heart sounds, which is valves closing, and write a real conclusion, not a restatement of the results. Try the DNA Translator to check transcription and translation steps.

The previous series is Higher Human Biology grade boundaries 2025, and every course is in SQA grade boundaries 2026.

Check yourself with today's paper

We do not have a Higher Human Biology paper. The nearest is the Higher Biology daily paper, a short timed paper of 8 questions and 25 to 35 marks written by us, which uses the same skills of reading data from graphs and tables and writing short biological explanations. A mark of 21 out of 30 is 70%, equal to the A share of 2026, and 15 out of 30 is 50%, equal to the C share.

Read next

Scotland · HigherHigher Human Biology: 2027 exam, boundaries, practiceHigher Human Biology explained: the 2027 single paper, the assignment, what the three areas cover, 2026 boundaries, where marks are lost, and practice.