Biology > MARK SCHEME > Mark Scheme (Results) Summer 2022 Pearson Edexcel International GCSE In Biology (4BI1) Paper 1BR (All)

Mark Scheme (Results) Summer 2022 Pearson Edexcel International GCSE In Biology (4BI1) Paper 1BR

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Question Number Answer Additional guidance Mark 1(a)(i) D is the only correct answer A is incorrect as it is the vacuole B is incorrect as it is cytoplasm C is incorrect as it is the cell memb... rane 1 Question Number Answer Additional guidance Mark 1(a)(ii) A is the only correct answer B is incorrect as animal cells have cytoplasm C is incorrect as animal cells have a cell membrane D is incorrect as animal cells have a nucleus 1 Question Number Answer Additional guidance Mark 1 (a)(iii) D (starch) is the only correct answer A is incorrect as glucose is not a storage molecule B is incorrect as glycerol is not a carbohydrate C is incorrect as plant cells do not have glycogen 1Question Number Answer Additional guidance Mark 1 (b) These are calculation steps • correct measurement of line as 50 mm • correct conversion of micrometres to millimetres or millimetres to micrometres • correct division of 50 000 µm by 125 or correct division of 50 mm by 0.125 (×) 400 (3) one mark for correct measurement of line +/- 1 mm i.e. one mark for 50 (mm) or 5 cm one mark for length × 1000 OR 0.125 (mm) one mark for dividing by 125 two marks for 50 000 (µm) (measurement and conversion) OR two marks for (X) 0.4 or (x) 4 or (x) 40 or (x) 40 000 Allow answer in the range of (x) 392 to (x) 408 for three marks Ignore other units 3 [Show More]

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