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Edexcel IGCSE Biology (4BI1) June 2021 Paper 1B Question Paper with Full Exam Content & Mark Scheme
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April 2026

2025/2026

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This is a complete and authentic copy of the Edexcel IGCSE Biology (4BI1) June 2021 Paper 1B examination paper. Covering essential topics such as the human heart and circulation, photosynthesis investigations, yeast and biofuel production, weed control methods, ecological pyramids, genetic inheritance and pedigrees, hormone development, milk composition comparisons, smoking and cancer data analysis, homeostasis, reflexes, and pollution effects, this resource provides the exact questions students...
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Pearson Edexcel IGCSE Biology Test Questions and Answers.
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January 2026

2025/2026

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Describe how substances can pass into and out of the cell surface membrane (6 marks) - Answer Diffusion is the movement of molecules from an area of high concentration to an area of low concentration e.g. small, non-polar molecules (oxygen and carbon dioxide) • Facilitated diffusion is the movement of molecules from an area of high concentration to area of low concentration and requires carrier or channel proteins. Examples are larger, polar molecules e.g. glucose • Active transport ...
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BIOLOGY UNIT 4: EDEXCEL IAL TEST PAPER AND ALL CORRECT ANSWERS 2025-2026 UPDATED.
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January 2026

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Describe the structures in a chloroplast that are involved in the light-dependent reactions of photosynthesis. - Answer 1) ref. to thylakoids. 2) made of membranes. 3) arranged as stacks/grana/eq. 4) contain chlorophyll}/eq. 5) arranged as photosystems. Suggest 2 advantages of growing crops of wheat in glasshouses with artificial lighting rather than growing them in open fields. - Answer 1) crops can be grown out of season/all year round/eq. 2) plants can photosynthesis 24 ho...
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BIOLOGY SB1 EDEXCEL GCSE (9-1) Questions and Answers.
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January 2026

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How do you work out magnification? - Answer multiply the magnifications of both the lenses together What does resolution mean? - Answer the smallest distance between 2 points that still can be seen as 2 points Light microscopes use... - Answer light and glass lenses to magnify an image electron microscopes use... - Answer beams of electrons passing through a specimen to build up an image SI units in order from smallest to largest - Answer picometres, nan...
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Biology Paper 2 IGCSE Edexcel Test Questions and Correct Answers.
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January 2026

2025/2026

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PH and enzyme function - Answer If too high or too low it can cause the enzymes to denature but often the enzymes optimum PH is 7 (not in the stomach!!) Calorimetry. What is it and how can you test for it? - Answer Calorimetry is the process of burning food to see how much energy it contains. Weigh food sample and skewer on mounted needle. Hold under test tube of water held with a clamp and set on fire. Continue to do this until the food no longer sets on fire. Measure the temp of...
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IGCSE Edexcel Biology Double Awards (All Topic for revision) Questions Fully Solved 2025-2026 Updated.
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January 2026

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M - MRSHGREN - Answer movement, for all or part of the organism R - MRSHGREN - Answer respiration, getting energy from food S - MRSHGREN - Answer Sense, changes in the surroundings H - MRSHGREN - Answer Homeostasis, controlling their internal environment G - MRSHGREN - Answer growth, development R - MRSHGREN - Answer reproduction, producing offspring E - MRSHGREN - Answer excretion, removing waste products N - MRSHGREN - Answer ...
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Test Paper- Edexcel iGCSE Biology Questions with Guaranteed Pass Solutions 2025-2026 Updated.
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Processes of living organisms - Answer Movement, reproduction, sensitivity, control, growth, respiration, excretion, nutrition Types of living organisms - Answer Animal, Plant, Bacteria, Protoctist, Fungi, Virus Structure of Animal Cells - Answer Cell Membrane, Cytoplasm, Nucleus Characteristics of Animals - Answer Multicellular, feed on other organisms, carbohydrates as glycogen Example of Animals - Answer Human or Mosquitos Invertebrates - Answer ...
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Paper 1 Edexcel IGCSE Biology Test Questions All Solved Correct 2025-2026 Updated.
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January 2026

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What are the characteristics of living things? - Answer Move, respire, sensitivity, grow, respire, excrete, nutrition, control Describe eukaryotic cells Example - Answer Complex large cell Contain Nucleus Any mammal/insect cell Describe prokaryotic cells Example - Answer Small simple cell No nucleus Floating DNA Amoeba/Chlorella Animal cell: Structure Carbohydrate store Example - Answer Multicellular Contain: No cell wall Store carbs as Glycogen
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Edexcel IGCSE biology- Revision Questions All Answered Correctly 2025-2026 Updated.
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What is meant by the term organ - Answer tissue(s) that carry out (same) function / different cell types that carry out (same) function / eq; Describe the two chemical tests someone could use to identify each type of carbohydrate, starch and glucose - Answer 1. iodine; 2. Brownie orange to blue black color- starch 3. Benedict's / eq; 4. heat / use water bath / eq; 5. Blue to brick red = glucose Molecule used to store carbohydrate in animals - Answer Glycogen Molecul...
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