Biology a level ocr Study guides, Class notes & Summaries

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OCR A Level Biology A H420/01 JUNE 2023 MARK SCHEME: Biological processes

OCR A Level Biology A H420/01 JUNE 2023 MARK SCHEME: Biological processes
Exam (elaborations) • 35 pages • 2023
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ocr A Level Biology A (H420/01) QUESTION PAPER June2023.
Exam (elaborations) • 48 pages • 2023
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ocr A Level Biology A H420-01 QUESTION PAPER June2023.

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ocr A Level Biology A (H420/01) MARK SCHEME June2023.
Exam (elaborations) • 38 pages • 2023
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ocr A Level Biology A H420-01 MARK SCHEME June2023.

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LATEST Biology A level OCR 100% (400+ QUESTIONS WITH VERIFIED SOLUTIONS 2023/2024

LATEST Biology A level OCR 100% (400+ QUESTIONS WITH VERIFIED SOLUTIONS 2023/2024
Exam (elaborations) • 228 pages • 2024

What is the MAIN role of membranes and what are the other roles? - ANSWER - COMPARTMENTALISATION -site of chemical reactions -cell signalling -cell adhesion How do cell membranes compartmentalise? - ANSWER Membranes are hydrophobic layers that separate different regions of substances dissolved in water. This hydrophobic layer acts as a barrier preventing the movement of hydrophilic molecules from one region to another. It keeps one compartment separate from another. What are the 3 examp...