📚 Year 11 OCR Biology: Vocabulary & Terminology Quick-Memorisation Guide | Year 11 OCR 生物：词汇术语速记指南
Mastering the precise vocabulary of biology is not just about passing an exam – it is about learning to think like a scientist. In Year 11 OCR Biology, you are expected to use terms such as 'active site', 'phloem', 'homeostasis' and 'synapse' accurately and confidently. This guide groups key terms by topic, explains them in clear English, and shows you how to link them to memorable images, word roots, and comparisons.
掌握精准的生物学术语不仅仅是为了通过考试——更是要学会像科学家一样思考。在 Year 11 OCR 生物课程中，你需要准确而自信地使用诸如 'active site'、'phloem'、'homeostasis' 和 'synapse' 这样的术语。本指南按主题将关键术语分组，用清晰的语言解释它们，并展示如何将它们与生动的图像、词根和对比联系起来，帮助你快速记忆。
1. Cell Structure and Transport | 细胞结构与运输
Every living thing is built from cells, and the vocabulary here forms the bedrock of the entire subject. Remember that a eukaryotic cell has a true nucleus bounded by a membrane, while a prokaryotic cell does not. The root 'eu-' means true, 'karyon' means kernel (nucleus), and 'pro-' means before – literally 'before nucleus'.
所有生物都由细胞构成，这里的词汇是整个学科的基石。记住，eukaryotic（真核）细胞具有由膜包裹的真正细胞核，而 prokaryotic（原核）细胞则没有。词根 'eu-' 表示真正的，'karyon' 表示核，'pro-' 表示在……之前——字面意思就是“细胞核之前”。
- Nucleus – contains genetic material (DNA); controls cell activities. / 细胞核——含遗传物质（DNA）；控制细胞活动。
- Cytoplasm – jelly-like substance where chemical reactions occur. / 细胞质——发生化学反应的胶状物质。
- Mitochondria (singular: mitochondrion) – site of aerobic respiration; release energy. / 线粒体——有氧呼吸的场所；释放能量。
- Ribosome – site of protein synthesis. / 核糖体——蛋白质合成的场所。
- Cell membrane – selectively permeable barrier controlling entry and exit of substances. / 细胞膜——控制物质进出的选择透过性屏障。
- Diffusion – net movement of particles from a region of higher concentration to a region of lower concentration (passive). / 扩散——粒子从高浓度区域向低浓度区域的净移动（被动过程）。
- Osmosis – diffusion of water molecules through a partially permeable membrane from a dilute solution to a more concentrated solution. / 渗透——水分子通过半透膜从稀溶液向较浓溶液的扩散。
- Active transport – movement of substances against a concentration gradient, using energy from ATP. / 主动运输——物质逆浓度梯度移动，利用ATP提供的能量。
Visualise a 'lock and key' model for transport proteins: only specific molecules fit. For osmosis, always ask: where is the water potential higher? Water moves down the water potential gradient.
想象一下运输蛋白的 “锁与钥匙” 模型：只有特定分子才能匹配。对于渗透作用，总是要问：哪里的水势更高？水沿着水势梯度移动。
2. Cell Division and Growth | 细胞分裂与生长
Mitosis is used for growth and repair, producing two genetically identical daughter cells. The word contains the same root as 'mitosis' – think of 'mito-' (thread) referring to chromosomes becoming visible as threads. Meiosis produces gametes with half the chromosome number, creating variation. A handy mnemonic: Mitosis makes Identical cells; Meiosis makes Eggs and sperm.
有丝分裂用于生长和修复，产生两个遗传上完全相同的子细胞。该词包含与 'mitosis' 相同的词根——'mito-'（线）指的是染色体变得可见如线状。减数分裂产生染色体数目减半的配子，创造变异。一个方便的助记法：Mitosis makes Identical cells；Meiosis makes Eggs and sperm。
- Chromosome – a long molecule of DNA found in the nucleus. / 染色体——细胞核中发现的长链DNA分子。
- Gene – a section of DNA that codes for a specific protein. / 基因——编码特定蛋白质的一段DNA。
- Allele – different version of the same gene. / 等位基因——同一基因的不同形式。
- Diploid (2n) – two sets of chromosomes; Haploid (n) – one set. / 二倍体（2n）——两套染色体；单倍体（n）——一套染色体。
- Stem cell – undifferentiated cell that can develop into specialised cells. / 干细胞——能分化成特化细胞的未分化细胞。
Think of chromosomes as a library of recipes (genes), and alleles as different flavour options of the same dish.
把染色体想象成一本食谱（基因）图书馆，等位基因就是同一道菜的不同口味选择。
3. Enzymes and Digestion | 酶与消化
Enzymes are biological catalysts that speed up reactions without being used up. Their names often end in '-ase' and reflect their substrate: protease breaks down protein, lipase breaks down lipids, amylase breaks down starch. The active site is a specifically shaped region where the substrate binds. Denaturation – when the active site changes shape permanently due to high temperature or extreme pH – is a key term for the exam.
酶是生物催化剂，能加速反应而自身不被消耗。它们的名称通常以 '-ase' 结尾，并反映其底物：protease（蛋白酶）分解蛋白质，lipase（脂肪酶）分解脂质，amylase（淀粉酶）分解淀粉。活性位点 是形状特定的区域，底物在此结合。变性——当活性位点因高温或极端pH而永久改变形状时——是考试的关键术语。
| Enzyme | Produces | Optimum pH |
| Amylase | Maltose from starch | Neutral (mouth/small intestine) |
| Protease | Amino acids from proteins | Acidic (stomach) / Neutral |
| Lipase | Fatty acids and glycerol from lipids | Alkaline (small intestine) |
Bile is not an enzyme; it emulsifies fats to increase surface area for lipase. Link 'emulsify' to 'milk shake' – breaking large fat globules into tiny droplets.
胆汁不是酶；它乳化脂肪以增加脂肪酶作用所需的表面积。将 'emulsify' 与 '奶昔' 联系起来——将大脂肪球打碎成微小液滴。
4. Respiration and Gas Exchange | 呼吸与气体交换
Respiration is not breathing; it is the release of energy from glucose inside cells. Aerobic respiration requires oxygen: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O. Anaerobic respiration in muscles produces lactic acid; in yeast, it produces ethanol and CO₂.
呼吸作用不是呼吸（换气）；它是葡萄糖在细胞内释放能量的过程。有氧呼吸需要氧气：C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O。肌肉中的无氧呼吸产生乳酸；在酵母中，产生乙醇和CO₂。
- Alveoli – tiny air sacs in lungs with large surface area, thin walls, good blood supply for gas exchange. / 肺泡——肺中的微小气囊，表面积大、壁薄、血液供应丰富，利于气体交换。
- Haemoglobin – red protein in red blood cells that binds oxygen. / 血红蛋白——红细胞中结合氧的红色蛋白质。
- Oxygen debt – extra oxygen needed after exercise to break down lactic acid. / 氧债——运动后分解乳酸所需的额外氧气。
Remember alveoli have 'moist, thin walls with a million friends' – huge surface area. Use the analogy of a crowded room: people (O₂) diffuse out when the door (membrane) opens to a less crowded space.
记住肺泡“湿润、壁薄、有百万个同伴”——即巨大的表面积。使用拥挤房间的类比：当门（膜）通向一个不那么拥挤的空间时，人们（O₂）会扩散出去。
5. Photosynthesis and Plant Transport | 光合作用与植物运输
erts light energy into chemical energy stored in glucose: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. The chloroplast contains chlorophyll, and the process is endothermic because it takes in energy. In OCR, you must also link it to limiting factors: light intensity, CO₂ concentration, temperature.
光合作用将光能转化为储存在葡萄糖中的化学能：6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂。叶绿体含有叶绿素，该过程是吸热的，因为它吸收能量。在OCR考试中，你还必须将其与限制因子联系起来：光照强度、CO₂ 浓度、温度。
Xylem and phloem are the plant's plumbing. Xylem transports water and minerals upwards (think 'xylem is up the stem' – 'xy' sounds like 'sky'). Phloem transports sugars and amino acids up and down (think 'phloem flows food both ways').
木质部和韧皮部是植物的管道系统。木质部向上运输水和矿质（“xylem is up the stem”——'xy' 听起来像 'sky'）。韧皮部上下运输糖和氨基酸（“phloem flows food both ways”）。
- Transpiration – loss of water vapour from leaves, mainly through stomata. / 蒸腾作用——水蒸气从叶片散失，主要通过气孔。
- Stomata – pores on leaf surface guarded by guard cells. / 气孔——叶片表面由保卫细胞控制的孔隙。
- Translocation – movement of sugars through phloem. / 运输作用——糖类通过韧皮部的移动。
6. The Nervous System and Hormones | 神经系统与激素
A reflex arc one → relay neurone → motor neurone → effector. Vocabulary is tightly linked to structure: synapse is the gap between neurones where chemicals (neurotransmitters) diffuse across.
反射弧绕过意识大脑：刺激 → 感受器 → 感觉神经元 → 中间神经元 → 运动神经元 → 效应器。词汇与结构紧密相连：synapse（突触）是神经元之间的间隙，化学物质（神经递质）在此扩散穿过。
Hormones like insulin and glucagon regulate blood glucose. Insulin lowers it (think 'in' the cell to store glucose); glucagon raises it (think 'glucose gone' from liver stores).
像胰岛素和胰高血糖素这样的激素调节血糖。胰岛素降低血糖（想象将葡萄糖“in”入细胞储存）；胰高血糖素升高血糖（想象葡萄糖从肝糖原中“出来”）。
- Homeostasis – maintenance of a constant internal environment. / 稳态——维持恒定的内环境。
- Effector – muscle or gland that brings about a response. / 效应器——产生反应的肌肉或腺体。
- Receptor – cell or organ that detects a stimulus. / 感受器——检测刺激的细胞或器官。
7. DNA, Genetics and Inheritance | DNA、遗传与遗传学
DNA is a double helix made of nucleotides. Each nucleotide contains a phosphate, sugar (deoxyribose), and base (A, T, C, G). The complementary base pairing rule: A–T, C–G. Think 'Apple on a Tree; Car in the Garage'.
DNA 是由核苷酸构成的双螺旋。每个核苷酸包含一个磷酸、糖（脱氧核糖）和碱基（A, T, C, G）。互补碱基配对规则：A–T, C–G。助记：“Apple on a Tree; Car in the Garage”。
Genotype is the alleles an organism has (e.g. Bb); phenotype is the physical trait (e.g. brown eyes). Homozygous = two same alleles (BB or bb); heterozygous = two different alleles (Bb). A Punnett square helps predict outcomes.
基因型是指生物体拥有的等位基因（如 Bb）；表现型是物理特征（如棕色眼睛）。纯合子 = 两个相同的等位基因（BB 或 bb）；杂合子 = 两个不同的等位基因（Bb）。庞纳特方格 有助于预测结果。
- Dominant allele – expressed even if only one copy. / 显性等位基因——即使只有一份也会表达。
- Recessive allele – only expressed if two copies present. / 隐性等位基因——仅在两份都存在时表达。
- Mutation – a random change in DNA sequence. / 突变——DNA序列的随机改变。
8. Ecology: Organisms and Their Environment | 生态学：生物与其环境
Ecological terms are often confused. Use simple associations: habitat is where an organism lives (address); niche is its role (job). A quadrat is a square frame used to sample abundance; a transect is a line along which samples are taken.
生态学术语经常被混淆。使用简单的联想：habitat（栖息地）是生物居住的地方（地址）；niche（生态位）是它的角色（工作）。quadrat（样方）是用于抽样调查丰度的方形框；transect（样带）是沿着取样的线。
| Term | Memory trick |
| Population | Same species, same place, same time |
| Community | All populations in an area |
| Ecosystem | Community + abiotic factors |
| Biodiversity | Variety of life – bio = life, diversity = variety |
Decomposers break down dead material, releasing nutrients. Remember the carbon cycle: respiration and combustion return CO₂; photosynthesis removes it. Nitrogen cycle involves nitrogen-fixing bacteria, nitrifying bacteria, and denitrifying bacteria.
分解者分解死物，释放养分。记住碳循环：呼吸和燃烧释放 CO₂；光合作用吸收 CO₂。氮循环涉及固氮菌、硝化菌和反硝化菌。
9. Disease and the Immune System | 疾病与免疫系统
A pathogen is a microorganism that causes disease. Types include viruses, bacteria, fungi, and protists. Communicable diseases spread between individuals; non-communicable do not.
病原体是引起疾病的微生物。类型包括病毒、细菌、真菌和原生生物。传染性疾病在个体间传播；非传染性疾病则不会。
- Vaccination – introduces dead/weakened pathogen to trigger antibody production and memory cells. / 疫苗接种——引入死的或减毒的病原体，触发抗体产生和记忆细胞。
- Antibody – protein produced by white blood cells that binds to specific antigens. / 抗体——白细胞产生的蛋白质，与特定抗原结合。
- Antibiotic – chemical that kills bacteria (NOT viruses). / 抗生素——杀灭细菌（而非病毒）的化学物质。
- Placebo – dummy treatment used in drug trials for comparison. / 安慰剂——在药物试验中用于对比的虚假治疗。
- Double-blind trial – neither patient nor doctor knows who gets the drug, reducing bias. / 双盲试验——无论是患者还是医生都不知道谁在接受药物，以减少偏差。
10. Evolution and Classification | 进化与分类
Natural selection is the mechanism of evolution. Variation exists within a population; those with advantageous traits survive, reproduce, and pass on alleles. Over generations, the favoured trait becomes more common. 'Survival of the fittest' means fittest to the environment, not necessarily strongest.
自然选择是进化的机制。种群内存在变异；具有有利性状的个体存活、繁殖并将等位基因传递下去。经过世代，有利性状变得更普遍。“适者生存”中的“适者”是指最适合环境的，不一定是最强壮的。
The classification system: Kingdom, Phylum, Class, Order, Family, Genus, Species. Mnemonic: 'King Philip Came Over For Good Soup'. Binomial naming gives each species a two-part Latin name (Genus species), e.g. Homo sapiens.
分类系统：界、门、纲、目、科、属、种。助记：“King Philip Came Over For Good Soup”。双名法赋予每个物种一个由两部分组成的拉丁名（属名 + 种加词），例如 Homo sapiens。
Selective breeding is human-driven; genetic engineering transfers genes between species. Fossils provide evidence for evolution by preserving remains or traces of ancient organisms.
选择性育种是人为驱动的；基因工程是在物种之间转移基因。化石通过保存古代生物的遗骸或痕迹为进化提供证据。
11. Practical Skills and Command Words | 实验技能与指令术语
OCR exams expect you to interpret data and use specific terminology when describing practicals. Accuracy is closeness to true value; precision is closeness of repeated values. Validity – whether the investigation answers the question (fair test). Repeatable – same person, same method, same results. Reproducible – different person, same method, similar results.
OCR 考试要求你解读数据并在描述实验时使用特定术语。准确度 是接近真实值的程度；精确度 是重复值之间的接近程度。有效性——探究是否回答了问题（公平测试）。可重复性——同一个人、同样方法、同样结果。可再现性——不同的人、同样方法、近似结果。
Common command words:
- Describe – say what you see, no explanation. / 描述——说出你所看到的，无需解释。
- Explain – give reasons using scientific concepts. / 解释——用科学概念给出原因。
- Suggest – apply knowledge to a new situation. / 建议——将知识应用于新情况。
- Evaluate – weigh up advantages and disadvantages. / 评价——权衡优点和缺点。
- Calculate – work out a numerical answer, showing working. / 计算——算出数值答案，写出步骤。
Always label units clearly and use terms like control variable, independent variable, dependent variable correctly. The independent variable is the one you change; dependent is measured; controls are kept the same.
始终清楚地标注单位，并正确使用控制变量、自变量、因变量等术语。自变量是你改变的量；因变量是你测量的量；控制变量则保持不变。
12. Mnemonics and Quick-Fire Recap | 助记法与快速回顾
Here is a collection of brain-friendly mnemonics to lock down the vocabulary before your exam:
这里汇集了对大脑友好的助记法，帮助你在考前牢牢掌握这些词汇：
| Term set | Mnemonic / trick |
| MRS GREN (life processes) | Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition |
| Characteristics of alveoli | LADS: Large surface area, Air is moist, Diffusion distance short, Supply of blood |
| Factors affecting enzyme action | TPH: Temperature, pH, concentration (substrate & enzyme) |
| Carbon cycle processes | PRC: Photosynthesis, Respiration, Combustion |
| Classification order | King Philip Came Over For Good Soup |
Finally, practice active recall: cover up the definition, say it aloud, and then check. Write your own flashcards with the English term on one side and a simple Chinese explanation plus a sketch on the other. Consistent, short bursts of vocabulary revision will build your biological fluency far more effectively than one long cramming session.
最后，练习主动回忆：遮住定义，大声说出，然后检查。制作自己的抽认卡，一面写英文术语，另一面写简要的中文解释加一幅草图。坚持短时间、经常性的词汇复习，远比一次长时间的死记硬背更能有效地建立你的生物学语言流利度。
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