OCR A LEVEL BIOLOGY

Here are the best resources to pass OCR A LEVEL BIOLOGY. Find OCR A LEVEL BIOLOGY study guides, notes, assignments, and much more.

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OCR a level biology exam questions & answers
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March 2025

2024/2025

A+
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OCR a level biology exam questions & answers Abiotic components - ANSWERSComponents of an ecosystem that are non living Abiotic factors - ANSWERSNon living components of an ecosystem that effect other living organisms Acetycholine - ANSWERSChemical that acts as a transmitter that diffuses across synaptic cleft Acetycholinesterase - ANSWERSEnzyme in synaptic cleft that breaks down acetycholine. After it has triggered an action potential in the post synaptic neurone, acetycholine mus...
Bensuda
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Ocr A level biology
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May 2025

2024/2025

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Deze samenvatting behandelt de kernbegrippen uit hoofdstuk 3 over het fenotype voor het vak biologie in 3VWO. Het document bevat heldere uitleg over erfelijkheid, genotypen, fenotypen, chromosomen en DNA-structuren, met ondersteunende voorbeelden. Ook worden belangrijke termen als geslachtschromosomen, genen en de invloed van milieufactoren uitgelegd. Deze samenvatting is ideaal voor toetsvoorbereiding of als naslagwerk bij het maken van opdrachten.
Proffscholar2
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OCR a level biology exam with correct answers 2025
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January 2025

2024/2025

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Abiotic components correct answers Components of an ecosystem that are non living Abiotic factors correct answers Non living components of an ecosystem that effect other living organisms Acetycholine correct answers Chemical that acts as a transmitter that diffuses across synaptic cleft Acetycholinesterase correct answers Enzyme in synaptic cleft that breaks down acetycholine. After it has triggered an action potential in the post synaptic neurone, acetycholine must be broken down o...
HopeJewels
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OCR a level biology Exam Questions And Answers Verified 100% Correct
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July 2025

2024/2025

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OCR a level biology Exam Questions And Answers Verified 100% Correct Cyclic AMP (cAMP) - ANSWER Secondary messenger released inside cells to activate a response Cyclic changes - ANSWER Rhythmic changes, such as tides, day length, and fluctuations in predator and prey species Dark band - ANSWER In stritated muscle also known as the A band which shows the length of the mysoin filaments; there is some overlap with the actin filaments within this band. ...
TopGradeGuru
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OCR A-Level Biology exam test Questions with well researched answers graded A+
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September 2025

2025/2026

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OCR A-Level Biology exam test Questions with well researched answers graded A+
Nursequeen
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OCR A Level Biology A Module 5 Test Questions With Correct Answers 2024.
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May 2024

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5.1.1 COMMUNICATION AND HOMEOSTASIS - Answer 5.1.1 COMMUNICATION AND HOMEOSTASIS why do multicellular organisms need communication systems? e.g hormonal, nervous - Answer So they can respond to changes in the internal and external environment + coordinate the activities of different organs. responses can be behavioural or physiological How does responding to the environment help organisms survive? - Answer - increase chance of survival by responding to changes in external envir...
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A Level Biology OCR Exam – Test Questions and Correct Answers
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June 2025

2024/2025

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This resource includes exam-style questions with fully verified answers based on the OCR A Level Biology specification. Covers key topics such as cells, genetics, biodiversity, and biochemistry. Ideal for revision, practice, and exam preparation. Instantly downloadable and aligned with current OCR exam standards. Perfect for students aiming for top grades.
Goldscripts
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Ocr A level biology paper 2
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October 2024

2024/2025

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Efficiency of biomass transfer - answer-Biomass of previous trophic level divided by biomass of current trophic level then x 100 Saprobiotic nutrition - answer-Fungi and bacteria that produces enzymes within the cell which are then transported outside of the cell (extracellular) to digest biochemicals. They then absorb the products. Nitrogen fixation - answer-Taking nitrogen gas and incorporating it into a nitrogen compound. Rhizobium - answer-Found in root nodules. Fix nitrogen into am...
TOPDOCTOR
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OCR A Level Biology Hormonal Communication Unit Test Questions Fully Solved 2024.
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May 2024

2023/2024

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What are hormones? - Answer Chemical messengers which travel in the blood to activate target cells What are endocrine glands? - Answer Ones which secrete hormones into the blood to reach the target organ What are 8 examples of endocrine glands? - Answer 1. Endocrine pancreas 2. Testes 3. Ovaries 4. Pituitary gland 5. Thyroid gland 6. Pineal gland 7. Adrenal gland 8. Thymus What are gonads? - Answer Reproductive organs What are 3 examples of hormones made by the pituita...
TestSolver9
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OCR A Level Biology Biological Membranes Midterm Exam With Solved Solutions 2024.
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May 2024

2023/2024

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(a) What is a membrane? - Answer Structure that separates the contents of cells from their environment (a) What is compartmentalisation? - Answer The formation of separate membrane-bound areas in a cell (a) Why do certain organelles need to be compartmentalised? - Answer Metabolism includes many different and often incompatible reactions and environments - chemical gradients (a) Give another name for the cell surface membrane - Answer Plasma membrane (a) What are membranes fo...
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