Biology exam trends & analysis (2019–2025)

Give specific detail on meiosis and fertilisation, not general info; know meiosis (not mitosis) produces gametes

Use precise terms (vasodilation, hypothalamus, evaporative cooling) not general descriptions; understand the hypothalamus detects internal temperature and sweat evaporation cools the skin

Discuss data beyond repeating the table, identify dominant/recessive alleles, and write clearly and succinctly

Show cause and effect; use quantitative data; link the benefit to aquaculture

Present information concisely, interpret the table requirements, and understand each mutation type's effect on offspring

Interpret different data types to identify trends, link trends to the data, and use terms like incidence/distribution correctly

Use specific DNA and evolution detail; refer to natural selection, not Lamarckian inheritance

Mismatched drug to pathogen (antibiotics on viruses); confused antibiotics with antibodies; said the body, not bacteria, develops resistance

Provide a clear key per ear; read the dB axis; plot precisely

Demonstrate clear understanding of both transcription and translation

Lacked specificity (single-stranded RNA, not just single-stranded); classified by processes not structures

Just described the graphs without applying syllabus knowledge of vaccination, immunity and antibody action

Use the stimulus and link the mutation to a changed structure then loss of cell-division control; understand uncontrolled division causes cancer

Used general statements grouping diseases/technologies; lacked genetic-level detail; confused genetic technology with biotechnology

Understand replication yields two semiconservative molecules, each with one parent strand

Provide an appropriate key to aid interpretation of the Punnett squares

Make a definitive statement; a single band means homozygous; not probability/Punnett

Did not use the full grid with an appropriate, evenly divided scale

Apply biological knowledge to the situation using flowcharts

Distinguish allele from genotype and use all stem information to determine allele combinations

Specifically define disease categories (not just 'not caused by a pathogen') and use data and examples from all parts of Q33 to support the judgement

Lacked precise terminology such as 'engulf' or 'enclose'

Answer about DNA/chromosome structure, not location or general cell differences

Use terminology specific to biodiversity and biotechnology and give specific examples rather than general comments

Address the plural 'diseases' by giving more than one disease example

Use specific real educational programs as examples (more than one), not screening programs, genetic testing or legislation

Poor use of formats (Punnett squares); limited understanding of autosomal versus sex-linked inheritance

Did not distinguish gametic from somatic mutations; unclear which radiation causes DNA damage

Named a pathogen/genetic disease instead of environmental; gave a symptom not a cause

Name a specific pathogen (not a disease) and distinguish entry adaptations from immune-evasion or transmission adaptations

Failed to name a plant disease; stated 'has an impact' without a directional effect on agriculture