📚 Year 10 Eduqas Biology: Core Concepts Revision | 十年級Eduqas生物核心知識點梳理
Welcome to your comprehensive revision guide for Year 10 Eduqas Biology. This article brings together the essential topics that form the bedrock of the GCSE course. Whether you are brushing up on cell structure, untangling food webs, or revisiting how enzymes work, mastering these core concepts now will set you up for success in end-of-year assessments and give you a flying start for Year 11. Let's dive in and build your confidence one topic at a time.
欢迎阅读十年級Eduqas生物的完整复习指南。本文汇总了构成GCSE课程基石的核心主题。无论你是在温习细胞结构、理清食物网，还是重新学习酶的作用方式，现在掌握这些核心概念将帮助你在年末测评中取得成功，并为十一年級的学习抢占先机。让我们一起深入探讨，一步步建立你的信心。
1. Cell Structure | 细胞结构
All living organisms are built from cells. Animal cells contain a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes. Plant cells have the same basic components but also possess a rigid cell wall, a permanent vacuole and chloroplasts. Bacterial cells are prokaryotic: they lack a true nucleus and instead have a single loop of chromosomal DNA, along with small rings of DNA called plasmids.
所有生物体都由细胞构成。动物细胞含有细胞核、细胞质、细胞膜、线粒体和核糖体。植物细胞具有相同的基本结构，但还拥有坚硬的细胞壁、一个大液泡和叶绿体。细菌细胞是原核细胞：它们没有真正的细胞核，取而代之的是一条环状染色体DNA，以及被称为质粒的小型DNA环。
tron microscope reveals far greater detail at much higher magnifications. When drawing cells, you must follow biological drawing rules: use a sharp pencil, draw clear outlines without shading, and label structures with straight lines.
显微镜使我们能观察到这些结构。光学显微镜可以放大到约2000倍，而电子显微镜则在更高的放大倍数下显示出更多的细节。绘制细胞图时，必须遵循生物绘图规则：使用尖头铅笔，画出清晰的轮廓而不涂阴影，并用直线标注结构。
2. Cell Division and Growth | 细胞分裂与生长
Cell division by mitosis produces two genetically identical daughter cells. This process is essential for growth, repair and asexual reproduction. Before mitosis, the cell's DNA replicates, ensuring each new cell gets a full copy of the genetic information. The chromosomes line up at the centre of the cell, are pulled apart to opposite poles, and then the cytoplasm divides.
通过有丝分裂进行的细胞分裂会产生两个遗传上完全相同的子细胞。这个过程对于生长、修复和无性生殖至关重要。在有丝分裂之前，细胞的DNA会进行复制，确保每个新细胞获得一套完整的遗传信息。染色体排列在细胞中央，被拉向两极，然后细胞质分裂。
Stem cells are unspecialised cells that can differentiate into various cell types. In animals, embryonic stem cells can form any cell type, while adult stem cells are more limited. Plant meristem cells retain the ability to divide and differentiate throughout the plant's life. Stem cell research holds promise for treating conditions such as diabetes and paralysis, though it raises ethical considerations.
干细胞是未特化的细胞，可以分化成各种类型的细胞。在动物中，胚胎干细胞可以形成任何类型的细胞，而成体干细胞的分化潜力则较为有限。植物的分生组织细胞在整个生命周期中都保留着分裂和分化的能力。干细胞研究为治疗糖尿病和瘫痪等疾病带来了希望，但也引发了伦理方面的考量。
3. Transport Across Membranes | 跨膜运输
Substances move into and out of cells by diffusion, osmosis and active transport. Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration, down the concentration gradient. It is a passive process requiring no energy. Oxygen and carbon dioxide move across cell membranes by diffusion.
物质通过扩散、渗透和主动运输进出细胞。扩散是粒子从高浓度区域向低浓度区域的净移动，顺着浓度梯度进行。这是一个不消耗能量的被动过程。氧气和二氧化碳通过扩散穿过细胞膜。
Osmosis is the diffusion of water molecules across a partially permeable membrane, from a dilute solution to a more concentrated solution. Animal cells can burst or shrink if placed in solutions that are too dilute or too concentrated. Plant cells become turgid when water enters by osmosis, helping to support the plant.
渗透是水分子通过部分透性膜的扩散，从稀溶液向较浓溶液的方向移动。若被置于过稀或过浓的溶液中，动物细胞会胀破或皱缩。当水分通过渗透进入植物细胞时，细胞会变得硬挺，有助于支撑植物体。
Active transport moves substances against the concentration gradient, from low to high concentration. This process requires energy from respiration. Mineral ions are absorbed by root hair cells using active transport, which allows plants to obtain nutrients even when soil concentrations are low.
主动运输将物质逆浓度梯度移动，从低浓度侧运往高浓度侧。这个过程需要呼吸作用提供的能量。根毛细胞通过主动运输吸收矿物离子，这使得植物即使在土壤浓度较低时也能获取养分。
4. Enzymes | 酶
Enzymes are biological catalysts that speed up chemical reactions without being used up. They are proteins with a specific active site. The lock-and-key model explains that each enzyme's active site is complementary in shape to its substrate. When the substrate fits into the active site, an enzyme-substrate complex forms, and products are released.
酶是生物催化剂，能在不被消耗的情况下加速化学反应。它们是具有特定活性位点的蛋白质。锁钥模型说明，每种酶的活性位点形状与其底物互补。当底物嵌入活性位点时，形成酶-底物复合物，随后释放出产物。
Enzyme activity is affected by temperature and pH. As temperature rises, activity increases until it reaches an optimum. Beyond this, the enzyme denatures: the active site loses its shape and can no longer bind the substrate. Each enzyme also has an optimum pH; extremes of pH cause denaturation.
酶的活性受温度和pH值的影响。随着温度升高，活性增强，直至达到最适温度。超出这一温度后，酶会变性：活性位点形状改变，无法再与底物结合。每种酶也都有其最适pH值；极端的pH值会导致变性。
5. Digestive System | 消化系统
The digestive system breaks down large, insoluble food molecules into small, soluble ones that can be absorbed into the blood. Mechanical digestion begins in the mouth with chewing, while chemical digestion uses enzymes. Carbohydrases, proteases and lipases convert carbohydrates, proteins and lipids into smaller molecules.
消化系统将大的、不溶的食物分子分解为可吸收进入血液的小分子。机械性消化从口腔的咀嚼开始，而化学性消化则借助酶来完成。淀粉酶、蛋白酶和脂肪酶分别将碳水化合物、蛋白质和脂类转化为较小的分子。
Amylase is produced in the salivary glands and pancreas; it breaks down starch into maltose and other sugars. Proteases, such as pepsin in the stomach, digest proteins into amino acids. Lipases, with the help of bile, break down lipids into fatty acids and glycerol. Bile, produced by the liver and stored in the gall bladder, emulsifies fats to increase their surface area for lipase action and neutralises stomach acid.
淀粉酶在唾液腺和胰腺中产生；它将淀粉分解为麦芽糖和其他糖类。蛋白酶（如胃中的胃蛋白酶）将蛋白质消化为氨基酸。脂肪酶在胆汁的帮助下，将脂类分解为脂肪酸和甘油。胆汁由肝脏产生并储存在胆囊中，它乳化脂肪以增加脂肪酶作用的表面积，同时中和胃酸。
Absorption of digested food occurs mainly in the small intestine. The inner walls are lined with millions of villi, which provide a large surface area, have a good blood supply, and possess thin walls to facilitate efficient diffusion and active transport.
消化后食物的吸收主要在小肠中进行。小肠内壁排列着数百万个绒毛，这些绒毛提供了很大的表面积，拥有丰富的血液供应，且壁很薄，有利于高效扩散和主动运输。
6. Circulatory System | 循环系统
The human circulatory system consists of the heart, blood vessels and blood. It is a double circulatory system: deoxygenated blood is pumped to the lungs (pulmonary circulation), and oxygenated blood is pumped to the rest of the body (systemic circulation). This separation ensures that oxygen-rich blood is delivered efficiently.
人体循环系统由心脏、血管和血液组成。这是一个双循环系统：缺氧血被泵送至肺部（肺循环），而富氧血被泵送至身体其他部分（体循环）。这种分工确保富氧血液能被高效地输送。
The heart is a muscular organ with four chambers: right atrium, right ventricle, left atrium and left ventricle. Valves prevent backflow of blood. The natural resting heart rate is controlled by a group of cells in the right atrium called the pacemaker. Arteries carry blood away from the heart under high pressure; veins return blood to the heart and have valves to prevent backflow; capillaries form extensive networks and allow exchange of substances at the tissues.
心脏是一个拥有四个腔室的肌性器官：右心房、右心室、左心房和左心室。瓣膜防止血液倒流。自然的静息心率由右心房中一组称为起搏器的细胞控制。动脉将血液在高压下带离心脏；静脉将血液送回心脏，并具有防止倒流的瓣膜；毛细血管形成广泛的网络，并在组织中进行物质交换。
Blood is composed of red blood cells, white blood cells, platelets and plasma. Red blood cells contain haemoglobin which binds oxygen; white blood cells form part of the immune defence; platelets help blood clotting; plasma transports dissolved substances such as glucose, carbon dioxide and hormones.
血液由红细胞、白细胞、血小板和血浆组成。红细胞含有能结合氧气的血红蛋白；白细胞构成免疫防御的一部分；血小板有助于血液凝固；血浆运输可溶性物质，如葡萄糖、二氧化碳和激素。
7. Respiratory System | 呼吸系统
The respiratory system supplies oxygen for aerobic respiration and removes the carbon dioxide produced. Air enters through the trachea, which splits into bronchi, then into bronchioles and finally reaches tiny air sacs called alveoli. The alveoli are surrounded by a dense capillary network.
呼吸系统为有氧呼吸供应氧气，并清除产生的二氧化碳。空气通过气管进入，气管分支为支气管，再分为细支气管，最终到达被称为肺泡的微小气囊。肺泡周围包裹着密集的毛细血管网。
Gas exchange occurs across the thin walls of the alveoli and capillaries. Oxygen diffuses from the alveolar air into the blood, while carbon dioxide diffuses from the blood into the alveolar air to be exhaled. Adaptations of the alveoli include a large surface area, moist and thin walls (one cell thick), and rich blood supply, all of which maximise the efficiency of diffusion.
气体交换发生在肺泡和毛细血管的薄壁两侧。氧气从肺泡空气中扩散进入血液，而二氧化碳则从血液扩散进入肺泡空气并被呼出体外。肺泡的适应性特征包括：表面积大、壁薄且湿润（仅一个细胞厚），以及丰富的血液供应，这些都能最大限度地提高扩散效率。
8. Photosynthesis | 光合作用
Photosynthesis is the process by which plants and algae produce glucose and oxygen from carbon dioxide and water, using light energy. It is an endothermic reaction, meaning it takes in energy from the surroundings. The glucose produced can be used immediately for respiration, stored as starch, converted to cellulose for cell walls, or combined with other nutrients to form amino acids and lipids.
光合作用是植物和藻类利用光能，由二氧化碳和水生成葡萄糖和氧气的过程。这是一个吸热反应，意味着它从周围环境中吸收能量。产生的葡萄糖可以立即用于呼吸作用，也可以以淀粉形式储存，转化为纤维素构成细胞壁，或与其他养分结合形成氨基酸和脂类。
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
The rate of photosynthesis is affected by light intensity, carbon dioxide concentration and temperature. At low light intensity, the rate is limited by light; once another factor becomes limiting, further increases in light have no effect. Farmers can use knowledge of these limiting factors to enhance crop growth in greenhouses.
光合作用速率受光照强度、二氧化碳浓度和温度的影响。在低光照强度下，速率受光限制；一旦另一个因素成为限制因素，继续增加光照便不再有效。农民可以利用对限制因素的认识在温室中促进作物生长。
Leaves are adapted for photosynthesis. They are broad and flat to capture light, thin to allow efficient diffusion of gases, and contain chloroplasts packed with chlorophyll, which absorbs light energy. Stomata on the lower epidermis let carbon dioxide diffuse in and oxygen diffuse out, while also regulating water loss.
叶片适应光合作用的需要。它们宽大而扁平，以捕捉光线；薄而利于气体高效扩散；并含有充满叶绿素的叶绿体，用于吸收光能。下表皮上的气孔使二氧化碳得以扩散进入、氧气扩散逸出，同时调节水分蒸腾。
9. Ecosystems and Food Chains | 生态系统与食物链
An ecosystem is the interaction between a community of living organisms and their non-living (abiotic) environment. Organisms can be classified as producers (plants and algae, which make their own food), consumers (which eat other organisms) and decomposers (bacteria and fungi, which break down dead matter). A food chain shows the transfer of energy from one organism to another.
生态系统是生物群落与其非生物环境之间的相互作用。生物可分为生产者（植物和藻类，它们自己制造食物）、消费者（以其他生物为食）和分解者（细菌和真菌，分解死物）。食物链显示了能量从一个生物体向另一个生物体的传递。
Energy is lost at each trophic level through respiration, heat and undigested material. Only about 10% of the energy is passed on to the next level. This is why food chains rarely have more than five trophic levels. Pyramids of biomass represent the total mass of living material at each level, almost always showing a pyramid shape.
能量在每一营养级通过呼吸作用、散热和未消化物质而损失。仅有约10%的能量被传递到下一级。这就是食物链很少超过五个营养级的原因。生物量金字塔表示每个层次上活物质的总质量，几乎总是呈现金字塔形。
Carbon is cycled through ecosystems. Carbon dioxide is absorbed by plants during photosynthesis. Carbon is then passed along food chains when consumers eat plants and other animals. Respiration by living organisms returns carbon dioxide to the atmosphere. Decomposers break down dead organisms and waste, releasing carbon dioxide back into the air. Combustion of fossil fuels also adds carbon dioxide to the atmosphere.
碳在生态系统中循环。植物在光合作用过程中吸收二氧化碳。当消费者摄食植物和其他动物时，碳沿着食物链传递。生物体的呼吸作用将二氧化碳返回大气。分解者分解死物和废物，将二氧化碳释放回空气中。化石燃料的燃烧也向大气中添加二氧化碳。
10. Inheritance | 遗传
The nucleus of a cell contains chromosomes made of DNA. A gene is a section of DNA that codes for a particular protein. Different versions of the same gene are called alleles. Alleles can be dominant or recessive. An organism's genotype is the combination of alleles it possesses, while its phenotype is the observable characteristics resulting from the genotype.
细胞核里含有由DNA组成的染色体。基因是DNA上编码特定蛋白质的一段序列。同一基因的不同版本称为等位基因。等位基因可以是显性或隐性。生物体的基因型是其拥有的等位基因组合，而表型是由基因型决定的可见特征。
In a monohybrid cross, punnet squares can be used to predict the probability of offspring inheriting certain traits. For example, if both parents are heterozygous for a trait, there is a 25% chance of a homozygous recessive offspring. Family pedigrees allow us to track the inheritance of traits across generations.
在单基因杂交中，旁氏方格可用于预测子代继承特定性状的概率。例如，如果亲本双方都是杂合子，那么子代出现纯合隐性的概率为25%。家族系谱使我们能够追踪性状在代际间的遗传。
Some disorders are inherited. Cystic fibrosis is caused by a recessive allele, meaning an individual must inherit two copies to develop the condition. Polydactyly (extra fingers or toes) is caused by a dominant allele. Understanding patterns of inheritance helps families make informed decisions and contributes to the development of genetic screening.
有些疾病是遗传性的。囊性纤维化由一个隐性等位基因引起，意味着个体必须继承两个拷贝才会患病。多指（趾）症由一个显性等位基因引起。了解遗传模式有助于家庭做出知情决策，并推动遗传筛查的发展。
Published by TutorHao | Biology Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图