Core Knowledge Consolidation for Pre-U Edexcel Biology | Pre-U Edexcel 生物核心知识点梳理

📚 Core Knowledge Consolidation for Pre-U Edexcel Biology | Pre-U Edexcel 生物核心知识点梳理

This article provides a comprehensive overview of the core concepts assessed in the Edexcel Pre-U Biology specification. It covers ten essential topics, from biomolecules and cell structures to genetics, ecology and biotechnology. Each section includes bilingual explanations designed to reinforce your understanding and exam readiness.

本文全面梳理了Edexcel Pre-U生物考试中涉及的核心知识点，涵盖从生物分子、细胞结构到遗传学、生态学和生物技术的十个关键模块。每个部分均提供中英双语讲解，以加深你的理解并帮助备战考试。

1. Biological Molecules: Carbohydrates, Lipids, Proteins & Nucleic Acids | 生物分子：碳水化合物、脂质、蛋白质与核酸

Carbohydrates are classified into monosaccharides, disaccharides and polysaccharides. Monosaccharides, such as glucose (C₆H₁₂O₆), can exist as α-glucose or β-glucose isomers depending on the orientation of the -OH group on carbon 1.

糖类分为单糖、双糖和多糖。单糖如葡萄糖(C₆H₁₂O₆)可存在α-葡萄糖和β-葡萄糖异构体。

Disaccharides are formed by a condensation reaction between two monosaccharides, producing a glycosidic bond; examples include maltose (glucose+glucose), sucrose (glucose+fructose) and lactose (glucose+galactose).

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