H420 2 Study guides, Class notes & Summaries

OCR GCE A LEVEL BIOLOGY A -MARK SCHEME JUNE 2003 (H420-2)Biological diversity

OCR 2023 Biology A H420/03: Unified biology A Level Question Paper & Mark Scheme (Merged) Biology A Unified biology Please Review and leave your Rating stars…. 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 Wednesday 21 June 2023 – Morning A Level Biology A H420/03 Unified biology Time allowed: 1 hour 30 minutes * INSTRUCTIONS • Use black ink. You can use an HB pencil, ...

OCR 2023 Biology AH420/02: Biological diversity A Level Question Paper & Mark Scheme (Merged) Biology A Biological diversity Please Review and leave Rating stars…. 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 Friday 16 June 2023 – Morning A Level Biology A H420/02 Biological diversity Time allowed: 2 hours 15 minutes INSTRUCTIONS • Use black ink. You can use an HB pe...

OCR 2023 Biology A H420/01: Biological processes A Level Question Paper & Mark Scheme (Merged) Biology A Biological processes Please Review and leave your Rating stars…. 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 Wednesday 7 June 2023 – Afternoon A Level Biology A H420/01 Biological processes Time allowed: 2 hours 15 minutes INSTRUCTIONS • Use black ink. You can us...

OCR 2023 Biology A H420/03: Unified biology A Level Question Paper & Mark Scheme (Merged) Biology A Unified biology Please Review and leave your Rating stars…. 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 Wednesday 21 June 2023 – Morning A Level Biology A H420/03 Unified biology Time allowed: 1 hour 30 minutes * INSTRUCTIONS • Use black ink. You can use an HB pencil, ...

A Level Biology A H420/02 Biological diversitySECTION A You should spend a maximum of 20 minutes on this section. Write your answer for each question in the box provided. Answer all the questions. 1 Which of the following best describes a microscope with high resolution? A The microscope can distinguish structures that are very close together. B The microscope can view structures that are very small. C The microscope is capable of high magnification. D The microscope has an in-built eye...

OCR 2023 Biology A H420/01: Biological processes A Level Question Paper & Mark Scheme (Merged) Biology A Biological processes Please Review and leave your Rating stars…. 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 Wednesday 7 June 2023 – Afternoon A Level Biology A H420/01 Biological processes Time allowed: 2 hours 15 minutes INSTRUCTIONS • Use black ink. You can us...

OCR: OXFORD CAMBRIDGE: A LEVEL BIOLOGY A-2021: H420/02 BIOLOGICAL DIVERSITY ACTUAL QUESTION PAPER MERGED WITH MARK SCHEME SECTION A You should spend a maximum of 20 minutes on this section. Answer all the questions. 1 If a person is bitten by a venomous snake, the immediate treatment is normally to inject the person with the appropriate antibodies. This is an example of which type of immunity? A artificial active immunity B artificial passive immunity C natural active immu...

OCR A_Level Biology Paper 1 Marking Scheme. Question Answer Marks AO element 1 D 1 1.2 2 B 1 1.1 3 A 1 1.1 4 A 1 1.1 5 B 1 1.1 6 B 1 1.1 7 B 1 1.1 8 B 1 1.1 9 A 1 2.6 10 A 1 2.6 11 C 1 2.3 12 C 1 2.4 13 B 1 1.1 14 C 1 1.2 15 B 1 2.5 Total 15 H420/01 Mark Scheme Question Answer Marks AO element 16 (a) (i) adenine 1 2.1 DO NOT ALLOW adenosine IGNORE nitrogenous base / purine (a) (ii) hydrolysis 1 2.1 IGNORE dephosphorylation (a) (ii...

OCR 2023 Biology AH420/02: Biological diversity A Level Question Paper & Mark Scheme (Merged) Biology A Biological diversity Please Review and leave Rating stars…. 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 Friday 16 June 2023 – Morning A Level Biology A H420/02 Biological diversity Time allowed: 2 hours 15 minutes INSTRUCTIONS • Use black ink. You can use an HB pe...