Edexcel IGCSE Biology Double Award Revision
A guide to the Edexcel IGCSE Biology Double Award Syllabus for 2020
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GCSE RS
IGCSE Chemistry
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Friday, 24 June 2016
2.5 identify the chemical elements present in carbohydrates, proteins and lipids
2.5 •carbohydrates: •carbon, hydrogen, oxygen
•proteins: •carbon, hydrogen, oxygen, nitrogen
•lipids: •fatty acids, glycerol (lipids contain carbon, hydrogen, oxygen atoms)
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