📚 Year 10 Eduqas Biology: Core Knowledge Summary | Year 10 Eduqas 生物：核心知识点梳理
Mastering Year 10 Eduqas Biology means building a strong understanding of cells, biological molecules, physiological systems, and the basic principles of life. This article summarises the key topics you need to know, presenting each concept first in English and then in Chinese to support bilingual learning. Use this as a structured revision guide to check your knowledge, fill gaps, and prepare confidently for internal assessments and final GCSE exams.
掌握 Year 10 Eduqas 生物学意味着扎实理解细胞、生物分子、生理系统以及生命的基本原理。本文梳理了你必须掌握的核心主题，每个概念先用英文阐述，再用中文对应讲解，以支持双语学习。请将本文作为结构化复习指南，检查知识掌握程度、填补漏洞，并为校内测验和最终的 GCSE 考试做好充分准备。
1. Cell Structure and Function | 细胞结构与功能
All living organisms are built from cells. Eukaryotic cells, such as those of animals and plants, contain a nucleus and membrane-bound organelles, while prokaryotic bacterial cells lack a nucleus and have DNA floating freely in the cytoplasm.
所有生物体都由细胞构成。真核细胞，例如动物细胞和植物细胞，含有一个细胞核和多种膜结合的细胞器，而原核的细菌细胞则没有细胞核，DNA 游离在细胞质中。
Animal cells typically include a cell membrane, cytoplasm, nucleus, mitochondria and ribosomes. Plant cells share these structures but also possess a rigid cellulose cell wall, chloroplasts for photosynthesis, and a large permanent vacuole that maintains turgor pressure.
动物细胞通常包含细胞膜、细胞质、细胞核、线粒体和核糖体。植物细胞同样拥有这些结构，但还具有坚固的纤维素细胞壁、进行光合作用的叶绿体，以及维持膨压的中央大液泡。
Many cells are specialised to perform specific functions. For instance, sperm cells have a streamlined head and a tail for movement, root hair cells have a long extension to absorb water and minerals, and xylem vessels are hollow tubes strengthened with lignin to transport water.
许多细胞是特化的，以执行特定功能。例如，精子细胞具有流线型的头部和用于运动的尾部，根毛细胞具有长长的突起以吸收水分和矿物质，木质部导管是由木质素加固的中空管道，用来运输水分。
Microscopy is essential for observing cells. The formula for calculating total magnification is:
Magnification = size of image / size of real object
显微镜观察是观察细胞必不可少的工具。计算总放大倍数的公式如下：
放大倍数 = 图像大小 / 实物大小
| Feature / 特征 | Animal cell / 动物细胞 | Plant cell / 植物细胞 | Bacterial cell / 细菌细胞 |
|---|---|---|---|
| Nucleus / 细胞核 | Present / 有 | Present / 有 | Absent (loop of DNA) / 无（环状 DNA） |
| Cell wall / 细胞壁 | Absent / 无 | Present (cellulose) / 有（纤维素） | Present (peptidoglycan) / 有（肽聚糖） |
| Chloroplasts / 叶绿体 | Absent / 无 | Present / 有 | Absent / 无 |
2. Cell Division: Mitosis and the Cell Cycle | 细胞分裂：有丝分裂与细胞周期
The cell cycle describes the sequence of events that cells go through as they grow and divide. It is divided into interphase (cell growth and DNA replication) and mitotic phase, which includes mitosis and cytokinesis.
细胞周期描述了细胞生长和分裂时所经历的一系列事件。它分为间期（细胞生长和 DNA 复制）和分裂期，分裂期包括有丝分裂和胞质分裂。
Mitosis produces two genetically identical daughter cells from a single parent cell. It is used for growth, repair of damaged tissues, and asexual reproduction in some organisms. The main stages are prophase, metaphase, anaphase and telophase, but you need to understand the overall outcome rather than memorise every sub-stage in detail.
有丝分裂从一个母细胞产生两个遗传上完全相同的子细胞。它用于生物体的生长、受损组织的修复，以及某些生物的无性繁殖。主要阶段包括前期、中期、后期和末期，但你需要理解的是整体结果，而非详细记忆每个子阶段。
Stem cells are unspecialised cells that can divide to produce more stem cells and differentiate into various cell types. In medicine, embryonic and adult stem cells offer potential therapies, but their use raises ethical concerns.
干细胞是未特化的细胞，能够分裂产生更多干细胞，并分化成多种细胞类型。在医学中，胚胎干细胞和成体干细胞具有治疗潜力，但也引发了伦理争议。
3. Organisation: Tissues, Organs and Systems | 组织层次：组织、器官和系统
ning. The levels of organisation are: cells → tissues → organs → organ systems → organism.
在多细胞生物中，细胞按照层次结构组织起来，以保证功能高效运转。组织的层级为：细胞 → 组织 → 器官 → 器官系统 → 生物体。
A tissue is a group of similar cells working together, such as muscular tissue or xylem tissue. An organ is composed of different tissues working together, e.g. the stomach contains muscular tissue, epithelial tissue and glandular tissue. Organ systems are groups of organs that perform a major body function, such as the digestive system or the circulatory system.
组织是一群相似细胞共同协作，例如肌肉组织或木质部组织。器官由不同的组织共同构成，如胃包含肌肉组织、上皮组织和腺体组织。器官系统则是共同执行一项重要生理功能的一组器官，例如消化系统或循环系统。
A key example is the digestive system, where the stomach, pancreas, small intestine and large intestine cooperate to break down food and absorb nutrients.
一个关键例子是消化系统，其中胃、胰腺、小肠和大肠协同工作，以分解食物并吸收营养。
4. Enzymes: Biological Catalysts | 酶：生物催化剂
Enzymes are large protein molecules that act as biological catalysts, speeding up metabolic reactions without being used up. Each enzyme has an active site with a specific shape that is complementary to its substrate – the lock and key model.
酶是大型蛋白质分子，作为生物催化剂加速代谢反应而自身不被消耗。每种酶都有活性位点，其形状与底物互补——这就是锁钥模型。
Enzyme activity is affected by temperature and pH. As temperature increases, activity rises until an optimum is reached; beyond this, the enzyme denatures and the active site changes shape irreversibly. Similarly, each enzyme works best at a particular pH; extremes of pH can also cause denaturation.
酶的活性受温度和 pH 影响。随着温度升高，活性增强直至达到最适温度；超过最适温度，酶变性，活性位点不可逆地改变形状。同样，每种酶在特定 pH 下工作效率最高；极端的 pH 也会导致变性。
Enzymes are essential in digestion (amylase breaks down starch, proteases break down proteins, lipases break down lipids), in DNA replication, and in many other cellular processes.
酶在消化（淀粉酶分解淀粉，蛋白酶分解蛋白质，脂肪酶分解脂类）、DNA 复制以及许多其他细胞过程中至关重要。
5. The Digestive System and Food Tests | 消化系统与食物检测
Digestion breaks large insoluble molecules into small soluble ones that can be absorbed into the blood. Mechanical digestion (chewing, churning) increases surface area, while chemical digestion relies on enzymes.
消化将大而不溶于水的分子分解成小且可溶的分子，以便被吸收进血液。物理消化（咀嚼、搅拌）增大了表面积，而化学消化则依赖酶。
Carbohydrases (amylase) break down starch into maltose and other sugars; proteases break proteins into amino acids; lipases hydrolyse lipids into glycerol and fatty acids. Bile, produced by the liver, emulsifies fats and neutralises stomach acid, providing an alkaline environment for small intestine enzymes.
淀粉酶等碳水化合物酶将淀粉分解为麦芽糖和其他糖类；蛋白酶将蛋白质分解为氨基酸；脂肪酶将脂类水解为甘油和脂肪酸。肝脏分泌的胆汁能够乳化脂肪并中和胃酸，为小肠中的酶提供碱性环境。
You must be familiar with standard food tests:
- Starch: iodine solution turns blue-black.
- Reducing sugars: Benedict's solution turns brick-red upon heating.
- Protein: Biuret reagent turns lilac/purple.
- Lipids: ethanol emulsion test gives a cloudy white layer.
你必须熟悉标准的食物检测方法：
- 淀粉：碘液变为蓝黑色。
- 还原糖：本尼迪克特试剂加热后变为砖红色。
- 蛋白质：双缩脲试剂变为紫红色/紫色。
- 脂类：乙醇乳液实验产生浑浊的白色层。
6. The Circulatory System and Blood | 循环系统与血液
The circulatory system in humans is a double circulation: the right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body. This separation ensures efficient delivery of oxygen and nutrients.
人体的循环系统是双循环：右侧将脱氧血泵送到肺部，左侧将含氧血泵送到全身各处。这种分离保证了氧气和营养的高效输送。
The heart is a muscular organ with four chambers: left and right atria, and left and right ventricles. Valves prevent backflow of blood. Arteries carry blood away from the heart under high pressure; veins return blood to the heart and contain valves; capillaries allow exchange of substances at the tissues.
心脏是一个肌肉器官，有四个腔室：左心房、右心房，左心室、右心室。瓣膜防止血液倒流。动脉在高压下将血液运离心脏；静脉将血液送回心脏，内部有瓣膜；毛细血管则在组织处实现物质交换。
Blood is composed of red blood cells (carry oxygen using haemoglobin), white blood cells (defend against pathogens), platelets (involved in clotting), and plasma (transports dissolved substances, hormones, and waste).
血液由红细胞（利用血红蛋白运输氧气）、白细胞（防御病原体）、血小板（参与凝血）和血浆（运输溶解的物质、激素和废物）组成。
7. Respiration: Aerobic and Anaerobic | 呼吸作用：有氧与无氧呼吸
Respiration is the process that releases energy from glucose, which is used to power cellular activities. It is an exothermic reaction and occurs continuously in living cells.
呼吸作用是释放葡萄糖中能量的过程，这些能量用于驱动细胞活动。它是一个放热反应，在活细胞中持续进行。
Aerobic respiration uses oxygen and releases a large amount of energy:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O (+ energy)
有氧呼吸利用氧气，释放大量能量：
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O（+ 能量）
Anaerobic respiration occurs when oxygen is insufficient. In animal muscles, glucose is converted to lactic acid, releasing a small amount of energy. In plants and yeast, glucose is broken down into ethanol and carbon dioxide – this is fermentation.
当氧气不足时发生无氧呼吸。在动物肌肉中，葡萄糖转化为乳酸，释放少量能量。在植物和酵母中，葡萄糖分解为乙醇和二氧化碳——这就是发酵。
In animals: glucose → lactic acid
在动物中：葡萄糖 → 乳酸
In yeast: glucose → ethanol + carbon dioxide
在酵母中：葡萄糖 → 乙醇 + 二氧化碳
Oxygen debt arises after vigorous exercise; extra oxygen is needed to break down lactic acid into carbon dioxide and water in the liver.
剧烈运动后会出现氧债；需要额外的氧气，在肝脏中将乳酸分解为二氧化碳和水。
8. Photosynthesis and Plant Transport | 光合作用与植物运输
Photosynthesis is the process by which plants and algae produce glucose using light energy. It takes place in chloroplasts and can be summarised as:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
光合作用是植物和藻类利用光能产生葡萄糖的过程。它发生在叶绿体中，可概括如下：
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
The rate of photosynthesis is limited by light intensity, carbon dioxide concentration, and temperature. Farmers can manipulate these factors in greenhouses to maximise crop yields.
光合作用速率受光照强度、二氧化碳浓度和温度的限制。农民可以在温室中调控这些因素，以最大化作物产量。
Plants have two transport systems: xylem and phloem. Xylem tissue transports water and mineral ions from the roots upwards to the rest of the plant; the flow is passive and unidirectional. Phloem tissue transports dissolved sugars (translocation) from sources (photosynthetic leaves) to sinks (growing regions and storage organs).
植物有两条运输系统：木质部和韧皮部。木质部组织将水分和矿物质离子从根部向上运输到植株其他部位；这一流动是被动的、单向的。韧皮部组织将溶解的糖类（转运作用）从源（进行光合作用的叶片）运送到库（生长区域和储存器官）。
Transpiration is the loss of water vapour from leaves, mainly through stomata. It creates the tension that pulls water up the xylem in the transpiration stream. Factors affecting transpiration include light, temperature, humidity and wind speed.
蒸腾作用是水蒸气从叶片散失的过程，主要通过气孔进行。它产生的拉力将水分沿木质部向上拉，形成蒸腾流。影响蒸腾作用的因素包括光照、温度、湿度和风速。
9. Health, Disease and Defence | 健康、疾病与防御
Health is a state of physical and mental well-being. Diseases can be communicable (caused by pathogens and transmitted between individuals) or non-communicable (e.g. cancer, heart disease, often linked to lifestyle or genetic factors).
健康是一种身体和精神上的完好状态。疾病可分为传染性疾病（由病原体引起，可在个体间传播）和非传染性疾病（如癌症、心脏病，通常与生活方式或遗传因素相关）。
Pathogens include bacteria, viruses, fungi, and protists. They can be spread through air droplets, direct contact, contaminated water or food, and vectors. The body has several defence lines: skin as a physical barrier, nasal hairs, mucus, and stomach acid to trap or destroy invaders.
病原体包括细菌、病毒、真菌和原生生物。它们可通过飞沫、直接接触、被污染的水或食物以及病媒生物传播。人体有多道防线：皮肤作为物理屏障，鼻毛、黏液和胃酸捕捉或杀死入侵者。
If pathogens enter the body, white blood cells respond through phagocytosis (engulfing and digesting microbes) and the production of antibodies. Antibodies are specific proteins that lock onto antigens on a pathogen, leading to its destruction. Memory cells remain, giving immunity against future infections.
如果病原体进入体内，白细胞通过吞噬作用（吞噬并消化微生物）和产生抗体作出反应。抗体是与病原体上的抗原特异性结合的蛋白质，导致病原体被消灭。记忆细胞保留下来，使人体对未来的感染具有免疫力。
Vaccination introduces a harmless form of an antigen to trigger the production of memory cells, protecting individuals and contributing to herd immunity. Antibiotics kill or inhibit bacteria but are ineffective against viruses. Painkillers relieve symptoms but do not treat the underlying cause.
疫苗接种是将无害形式的抗原引入体内，以激发记忆细胞的产生，既保护个体又有助于群体免疫。抗生素能杀死或抑制细菌，但对病毒无效。止痛药缓解症状，但不治疗根本病因。
10. Experimental Skills and Key Terminology | 实验技能与关键术语
Throughout your Year 10 course, practical work is assessed through specified practical activities and mathematical skills. You must be able to plan investigations, identify independent, dependent and control variables, and evaluate the reliability and reproducibility of results.
在整个 Year 10 课程中，实践能力通过指定实验活动和数学技能进行评估。你必须能够设计实验、识别自变量、因变量和控制变量，并评价结果的可靠性和可重复性。
Key mathematical skills include calculating rates of reaction from tables or graphs, using the magnification formula, converting units, constructing and interpreting bar charts, line graphs and scatter diagrams, and recognising correlations and causal relationships.
关键的数学技能包括根据表格或图线计算反应速率、使用放大倍数公式、单位换算、绘制和解释条形图、折线图和散点图，以及识别相关性和因果关系。
Essential terminology: 'accuracy' refers to how close a measurement is to the true value; 'precision' relates to the consistency of repeated measurements; 'validity' means that only the independent variable has affected the outcome. Understanding these terms will help you write detailed conclusions and evaluations.
基本术语：'准确度'指测量值与真实值的接近程度；'精密度'指重复测量结果的一致性；'有效性'意味着只有自变量影响了实验结果。理解这些术语有助于你写出细致的结论和评价。
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