2023 · Question 3
1 markSection1 · Section 1
PDF page 3 · check any continuation
DNA structure and replication
Use base pairing, strand direction and enzyme roles as required.
Published marking linked · general strategy, not a model answer
Free practice · 2022–2026
4,095 source-linked questions and language tasks across 14 subjects. Choose a topic, attempt the original question, then use its published marking and method guidance.
4,095 matching entries · showing 169–192. Mixed questions appear in every relevant topic filter, but are counted once.
National 5 Biology
Section1 · Section 1
PDF page 3 · check any continuation
DNA structure and replication
Use base pairing, strand direction and enzyme roles as required.
Published marking linked · general strategy, not a model answer
National 5 Biology
Section1 · Section 1
PDF page 8 · check any continuation
Population interactions and behaviour
Explain interactions and their consequences for survival or reproduction.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 9 · check any continuation
Biodiversity and sampling
Choose or interpret a sampling method and evaluate what the data support.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 8 · check any continuation
Population interactions and behaviour
Explain interactions and their consequences for survival or reproduction.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 10 · check any continuation
Food webs and energy transfer
Trace feeding relationships and account for energy losses.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 10 · check any continuation
Population interactions and behaviour · Food webs and energy transfer
Explain interactions and their consequences for survival or reproduction.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 11 · check any continuation
Biodiversity and sampling
Choose or interpret a sampling method and evaluate what the data support.
Published marking linked · general strategy, not a model answer
Section2 · Section 2
PDF page 23 · check any continuation
Food webs and energy transfer
Trace feeding relationships and account for energy losses.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 9 · check any continuation
Population interactions and behaviour
Explain interactions and their consequences for survival or reproduction.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 8 · check any continuation
Food webs and energy transfer
Trace feeding relationships and account for energy losses.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 11 · check any continuation
Food webs and energy transfer
Trace feeding relationships and account for energy losses.
Published marking linked · general strategy, not a model answer
Section2 · Section 2
PDF pages 26–27 · check any continuation
Biodiversity and sampling
Choose or interpret a sampling method and evaluate what the data support.
Published marking linked · general strategy, not a model answer
National 5 Biology
Section1 · Section 1
PDF page 6 · check any continuation
Biological data calculations · Graph interpretation and conclusions
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 7 · check any continuation
Biological data calculations
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 9 · check any continuation
Biological data calculations
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 12 · check any continuation
Graph interpretation and conclusions
Describe evidence quantitatively and separate observations from explanations.
Published marking linked · general strategy, not a model answer
Section2 · Section 2
PDF pages 16–17 · check any continuation
Biological data calculations · Graph interpretation and conclusions
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 5 · check any continuation
Biological data calculations · Graph interpretation and conclusions
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 6 · check any continuation
Biological data calculations
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 6 · check any continuation
Biological data calculations · Graph interpretation and conclusions
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 8 · check any continuation
Biological data calculations · Graph interpretation and conclusions
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 12 · check any continuation
Biological data calculations
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 2 · check any continuation
Biological data calculations
Use the correct baseline, units and precision when processing biological data.
Published marking linked · general strategy, not a model answer
Section1 · Section 1
PDF page 4 · check any continuation
Experimental design and evaluation
Identify variables, controls and replication, and explain their purpose.
Published marking linked · general strategy, not a model answer
4,095 numbered questions or named language tasks across 250 source PDFs in this subject/level selection. Repeated copies of the same extracted question are grouped once. 115 entries still need topic classification. Optional essay and text choices are included; these counts are not the number you must answer in an exam.
Question anchors and printed allocations are extracted from SHA-256-verified source PDFs. Optional alternatives are not added together. Applicable all-question paper totals are reconciled with the printed rubric; mismatches withhold automatic mark totals. A first written-answer marking row is never treated as a whole-question total. Exact marking pages require a section-matched table anchor or a wording- and digest-checked source pair. Topic headings are conservative rule matches and provisional, not independently reviewed or proof of current syllabus coverage. Original questions, diagrams, passages and official answers remain in their source PDFs, not republished here. Scans, extraction gaps and uncertain marks remain visible rather than filled with invented content. Source audit: 2026-10-21. Question index: 2026-10-22. There were no ordinary exam sittings in 2020 or 2021. This is not a claim that every question has been independently checked or that scanned papers are fully indexed.
4 entries indexed; numbering or extraction still needs checking. Read the complete source for anything not listed.
The extracted allocations total 60, but the applicable printed total is 90. Automatic question totals are withheld for this source.