Ocr a level biology Study guides, Class notes & Summaries

This is the official question paper

A LEVEL 2023 OCR BIOLOGY QUESTION PAPER 3 WITH MARK SCHEME

OCR 2023 Biology A H020/02: Depth in biology AS Level Question Paper & Mark Scheme (Merged) Biology A Depth in biology Please write clearly in black ink. Do not write in the barcodes. Centre number Candidate number First name(s) Last name Oxford Cambridge and RSA Thursday 25 May 2023 – Morning AS Level Biology A H020/02 Depth in biology Time allowed: 1 hour 30 minutes INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write you...

OCR A level biology Written Exam 2024. Abiotic components - CORRECT ANSWER Components of an ecosystem that are non living Abiotic factors - CORRECT ANSWER Non living components of an ecosystem that effect other living organisms Acetycholine - CORRECT ANSWER Chemical that acts as a transmitter that diffuses across synaptic cleft Acetycholinesterase - CORRECT ANSWER Enzyme in synaptic cleft that breaks down acetycholine. After it has triggered an action potential in the post synaptic...

OCR A Level Biology Module 6 Final Exam Questions 2024. regulatory gene - CORRECT ANSWER a gene that codes for a transcription factor, so controls the expression of structural genes structural gene - CORRECT ANSWER gene that codes for polypeptide mutation - CORRECT ANSWER a random change in the sequence of bases in an individual gene, or in the structure of the chromosome (which changes the sequence of genes on the chromosome) examples of mutagenic agents - CORRECT ANSWER x-rays, U...