Year 7 CCEA Biology: Unit Test Mock Paper Walkthrough | Year 7 CCEA 生物：单元测试模拟卷解析

📚 Year 7 CCEA Biology: Unit Test Mock Paper Walkthrough | Year 7 CCEA 生物：单元测试模拟卷解析

Understanding the core concepts in Year 7 CCEA Biology requires not only memorising facts but also applying them to exam-style questions. This article walks you through a full mock unit test, breaking down each question step by step to reinforce your knowledge and boost your confidence for the real assessment.

理解Year 7 CCEA生物的核心概念不仅需要记忆事实，还需要将它们应用到考试题目中。本文为你详细解析一套完整的单元模拟试卷，逐步分析每一道题，帮助你巩固知识并提升应对真实评估的信心。

1. Question 1: Life Processes (MRS GREN) | 第1题：生命过程（MRS GREN）

The question asks: ‘Which list of life processes is performed by all living organisms?’ Options: A. movement, respiration, sensitivity, growth, reproduction, excretion, nutrition; B. photosynthesis, respiration, excretion; C. movement, reproduction, feeding, sleeping; D. growing, eating, breathing, thinking. The correct answer is A. This set is often remembered using the acronym MRS GREN. All living things carry out these seven processes, although plants may move more slowly and excrete oxygen as a waste product.

题目问道：”哪一组生命过程是所有生物都会进行的？” 选项：A. 运动、呼吸、感应、生长、繁衍、排泄、营养；B. 光合作用、呼吸、排泄；C. 运动、生殖、摄食、睡眠；D. 生长、进食、呼吸、思考。正确答案是A。这一组过程通常用首字母缩写MRS GREN来记忆。所有生物都进行这七项生命活动，尽管植物运动较慢，并以氧气作为排泄废物。

It is crucial to remember that movement in living organisms includes internal movements such as cytoplasmic streaming, and sensitivity means detecting and responding to changes in the environment. Photosynthesis is not a universal life process as only plants and some microorganisms perform it.

关键要记住，生物体的运动包括内部运动如细胞质流动，而感应是指探测并响应环境的变化。光合作用并非普适的生命过程，因为只有植物和某些微生物才能进行。

2. Question 2: Plant and Animal Cell Structures | 第2题：植物与动物细胞结构

The question reads: ‘Which of the following structures are present in a plant cell but absent in an animal cell?’ Options: A. cell membrane, nucleus, cytoplasm; B. cell wall, chloroplast, large permanent vacuole; C. nucleus, mitochondria, ribosomes; D. cell wall, cell membrane, chloroplast. The correct choice is B. Plant cells have a rigid cell wall made of cellulose, chloroplasts for photosynthesis, and a large permanent vacuole filled with cell sap. Animal cells lack these features.

题目为：”以下哪组结构存在于植物细胞中，但动物细胞中没有？” 选项：A. 细胞膜、细胞核、细胞质；B. 细胞壁、叶绿体、大液泡；C. 细胞核、线粒体、核糖体；D. 细胞壁、细胞膜、叶绿体。正确选项是B。植物细胞有由纤维素构成的坚硬细胞壁、进行光合作用的叶绿体以及充满细胞液的大液泡。动物细胞缺乏这些结构。

Bear in mind that both plant and animal cells share the cell membrane, nucleus, cytoplasm, mitochondria and ribosomes. A quick way to remember is that chloroplasts and a large vacuole are the ‘extra’ parts plants need to make food and store water.

请注意，植物和动物细胞都共有细胞膜、细胞核、细胞质、线粒体和核糖体。一个快速记忆的方法是：叶绿体和大液泡是植物用来制造食物和储存水分的”额外”部分。

3. Question 3: Using a Microscope | 第3题：显微镜的使用

A typical exam question might provide a diagram of a microscope and ask: ‘Label parts X and Y, and state the function of the objective lenses.’ The objective lenses are the lenses closest to the specimen; their function is to magnify the image. Usually, a school microscope has three objective lenses (low, medium and high power) that can be rotated to change magnification.

典型的考试题目可能给出显微镜图，问：”标出部件X和Y，并说明物镜的功能。” 物镜是最靠近标本的透镜；其功能是放大图像。通常，学校显微镜有三个物镜（低倍、中倍和高倍），可以旋转以改变放大倍数。

The total magnification is calculated by multiplying the eyepiece lens magnification (usually ×10) by the magnification of the objective lens. For example, using a ×40 objective gives a total of ×400 magnification. The coarse focus knob is used first with the low-power objective to bring the image roughly into view.

总放大倍数由目镜放大倍数（通常为×10）乘以物镜放大倍数得出。例如，使用×40物镜可获得×400的总放大倍率。粗准焦螺旋首先配合低倍物镜使用，使图像大致呈现。

4. Question 4: Food Chains and Energy Flow | 第4题：食物链与能量流动

The question presents a food chain: grass → rabbit → fox. Candidates are asked to name the producer and describe what the arrows show. Grass is the producer because it makes its own food through photosynthesis. The arrows indicate the direction of energy transfer; they show which organism is eaten by which and how energy flows from one trophic level to the next.

题目给出食物链：草 → 兔 → 狐。要求考生指出生产者并说明箭头表示什么。草是生产者，因为它通过光合作用制造自己的食物。箭头表示能量传递的方向；它们显示谁被谁吃，以及能量如何从一个营养级流向下一个营养级。

A common mistake is to think arrows point from the eater to the eaten, when in fact they follow the flow of energy and nutrients – always from the consumed to the consumer. The fox, as a carnivore, is a secondary consumer in this chain. Decomposers, which are not shown, break down dead material and return nutrients to the soil.

一个常见的错误是认为箭头从食者指向被食者，然而实际上箭头跟随能量和营养的流动——始终从被食者指向消费者。狐作为肉食动物，在该食物链中是次级消费者。未展示的分解者将死去的物质分解，并将养分归还土壤。

5. Question 5: Photosynthesis Word Equation | 第5题：光合作用的文字方程式

The incomplete equation reads: _________ + water → glucose + _________ (in the presence of light and chlorophyll). The missing substances are carbon dioxide and oxygen. So the full word equation is: carbon dioxide + water → glucose + oxygen. This process takes place in the chloroplasts of plant cells and converts light energy into chemical energy stored in glucose.

不完整的方程式为：_________ + 水 → 葡萄糖 + _________（在光和叶绿素存在下）。缺少的物质是二氧化碳和氧气。因此完整的文字方程式是：二氧化碳 + 水 → 葡萄糖 + 氧气。这个过程发生在植物细胞的叶绿体中，将光能转化为储存在葡萄糖中的化学能。

It is important to note that the green pigment chlorophyll absorbs sunlight to drive the reaction. The glucose

Published by TutorHao | Year 7 Biology Revision Series | aleveler.com

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