9bio Study guides, Class notes & Summaries

Pearson Edexcel GCE In Biology B (9BI0) Paper 02: Advanced Physiology, Evolution and Ecology summer 2023 marking scheme

Pearson Edexcel GCE In Biology B (9BI0) Paper 01: Advanced Biochemistry, Microbiology, and Genetics Summer 2023 Final mark scheme

Edexcel A Level Biology Paper 3 Mark scheme June 2022: (9BI0) Paper 3: General and Practical Principles in Biology. A description including four of the following • {sodium / Na} channels open (1) • sodium ions flow into {axon / cell / neurone} (1) • this causes depolarisation (1) • {sodium / Na} channels close at {0.8ms / 30mV} (1) • {potassium / K} channels open at {0.8ms / 30mV} (1) (4) Question Number Answer Additional Guidance Mark 1(b) An answer that includes the followin...

Edexcel A Level Biology Paper 3 Mark scheme June 2022: (9BI0) Paper 3 | General and Practical Principles in Biology. A description that includes four of the following: • obtain DNA (from the two types of plants) (1) • use of {restriction enzymes / endonuclease} to cut DNA into fragments (1) • {DNA / fragments} (loaded) on (agarose) gel with {current passed through / voltage or potential difference applied} (1) • fragments (of DNA) are separated (1) • {same / similar} (banding)...

This is the final mark scheme

Edexcel A Level Biology Paper 2 Mark Scheme June 2022: GCE In Biology B (9BI0/02) Paper 2: Advanced Physiology, Evolution and Ecology. The only correct answer is: D phosphodiester A is incorrect as this bond is found in lipids B is incorrect as this bond is found in carbohydrates C is incorrect as this bond pair bonds nucleotides (1) Question Number Answer Additional Guidance Mark 1(b) A description that makes reference to the following points: • {DNA polymerase} {joins the sugar phos...

Edexcel A Level Biology Paper 2 Mark Scheme June 2022: GCE In Biology B (9BI0/02) Paper 2 | Advanced Physiology, Evolution and Ecology. A calculation that makes reference to the following points: • correct calculation of percentage cytosine (1) • correct calculation of number of nucleotides (1) 15 % cytosine 15 % of 10 000 = 1500 Correct answer with no working gains full marks One mark for 15 % (2) Question Number Answer Additional Guidance Mark 2 (a)(i) The only correct answer is...

This is the final ark scheme

Pearson Edexcel GCE Questions booklet + Mark Scheme (Results) November 2021 In Biology B (9BI0/01) Paper 1: Advanced Biochemistry, Microbiology and Genetics

Pearson Edexcel GCE In Biology B (9BI0) Paper 02: Advanced Physiology, Evolution and Ecology Summer 2023 final mark scheme