Biology WBI15/01 June 2023 | Edexcel International A Level Past Papers With Mark Scheme

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1. magnesium ion uptake in plants—importance for chlorophyll, ATP use for active transport, oxygen presence effect on uptake rate
2. DNA profiling—PCR and gel electrophoresis use, identification of female and unrelated individuals via band pattern comparison
3. antibiotic mechanisms—bacteriostatic vs bactericidal action, resistance concerns, chromatography for Rf value identification
4. cellulose digestion—β-1,4 glycosidic bond breakdown, microbial symbiosis in panda gut, gene location in fungi vs bacteria
5. PBF impact on photosynthesis—oxygen production increase due to light absorption, biomass gain in PBF-treated algae
6. microbial succession—gut bacteria in developing pandas, Streptococcus detection via DNA sequencing, PCR, or hybridization methods

Edexcel International AS/A Level Biology (WBI) Jun 2023

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Classification: Unit 5

Page count: 40

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Biology WBI15/01 June 2023 | Edexcel International A Level Past Papers With Mark Scheme

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