OCR • Biology A

Summarised notes (and diagrams!) on difficult biology concepts. Specifically for OCR A A-level specification, but notes are relatively broad and can be used across exam boards. Summaries are specifically useful for 6 markers and many of the notes/diagrams are layed out in a way that makes them easily applicable to common 6 mark questions.

These notes were handwritten myself, using help from notes in given in class. This topic covers how DNA is analysed, modified, and transferred between organisms. It includes key techniques such as genetic engineering using restriction enzymes and DNA ligase to create recombinant DNA, and the use of vectors like plasmids to insert genes into host cells. The polymerase chain reaction (PCR) is used to amplify DNA, while gel electrophoresis separates DNA fragments for analysis. DNA sequencing allows...

A clear and concise set of flashcards designed to help you easily memorise the 4 stages of respiration: glycolysis, the link reaction, the Krebs cycle, and oxidative phosphorylation. Each card breaks down key steps, processes, and important details in a simple, easy-to-understand way—perfect for quick revision and boosting recall for exams.

This document provides in depth understanding and explanantions of different exam questions on OCR A Alevel Biology topic Neuronal communication MARK SCHEME SPECIFIC ANSWERS AND EXPLANATIONS FOR EACH QUESTION PRIVIDED

This document provides in depth understanding and explanations of different OCR A level Biology A exam questions for the topics, Neuronal communication and Photosynthesis. MARK SCHEME SPECIFIC ANSWERS AND EXPLANATIONS

2025 A-LEVEL OCR BIOLOGY A PAPER 3 MARK SCHEME

2025 A-LEVEL OCR BIOLOGY A PAPER 3

2025 A-LEVEL OCR BIOLOGY A PAPER 2 MARK SCHEME

2025 A-LEVEL OCR BIOLOGY A PAPER 2

2025 A-LEVEL OCR BIOLOGY A PAPER 1 MARK SCHEME