GCSEBiologyOCRBiology A (Gateway)Revision Notes

OCR GCSE Biology A (Gateway) Revision Notes

Exam code: J247

Revise with confidence using our OCR GCSE Biology A (Gateway) revision notes—expertly written to match your syllabus and support focused exam preparation. From cell biology to ecosystems, our clear explanations, examiner insights, and downloadable PDFs help you study smarter and boost your grades. Save My Exams provides trusted, high-quality resources designed to simplify complex topics and ensure you're fully prepared for success in your Biology exam.

1. Cell Level Systems

Light Microscopes

Electron Microscopes

Protein Synthesis

The Mechanism of Enzyme Action

Respiration is a Chemical Process

Aerobic & Anaerobic Respiration

Biological Molecules

Tests for Biological Molecules

Photosynthetic Organisms as Producers

The Effect of 3 Factors on Photosynthesis

Limiting Factors - Photosynthesis

2. Scaling Up

Cellular Transport - Diffusion & Osmosis

Cellular Transport - Active Transport

Mitosis & the Cell Cycle

Cell Differentiation

Stem Cells in Animals & Plants

Embryonic & Adult Stem Cells in Animals

Surface Area: Volume Ratio & Transport

Transport Into & Out of Organisms

Blood Composition

Transport of Water & Mineral Ions in Plants

Transpiration & Translocation

Affecting Water Uptake by a Plant

4. Community Level Systems

The Cycling of Materials

The Carbon Cycle

Decomposition & Decay

Levels of Organisation in an Ecosystem

Abiotic & Biotic Factors

Interdependence & Competition

Trophic Levels of Organisms

Pyramids of Biomass & Biomass Transfers

5. Genes, Inheritance & Selection

The Genome & Genetics

Influence of Genetic Variants on Phenotype

Sexual Reproduction

Asexual Reproduction

The History of Genetics

Genetic Variation Within a Population

Evolution Through Natural Selection

7. Practical Skills

Practical - Using Light Microscopes to View Cells

Practical - Testing for Food Molecules

Practical - DNA Extraction

Practical - Sampling Techniques - Quadrats

Practical - Investigating Enzymatic Reactions

Practical - Investigating Photosynthesis

Practical - Investigating Respiration

Practical - Using a Potometer

Practical - Measurement of Stomatal Density

Practical - Aseptic Technique

Practical - Surface Area: Volume Ratio

Practical - Investigating Osmosis

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