📚 Photosynthesis | 光合作用
Photosynthesis is one of the most important biological processes on Earth. It is the way green plants produce their own food and the source of nearly all the energy that flows through living communities. In this article, we cover everything you need for Edexcel IGCSE Biology: the word equation, the balanced symbol equation, leaf adaptations, limiting factors, and exam-style practical work.
光合作用是地球上最重要的生物过程之一。它是绿色植物制造自身食物的方式，也是流经整个生物群落的几乎所有能量的来源。本文将涵盖 Edexcel IGCSE 生物学的全部要点：文字方程式、配平符号方程式、叶片适应、限制因素以及考试风格的实验操作。
1. Definition and Word Equation | 定义与文字方程式
Photosynthesis is the process by which plants and some other organisms use light energy to convert carbon dioxide and water into glucose. Oxygen is released as a by-product. The energy from light is trapped by the green pigment chlorophyll and converted into chemical energy stored in glucose.
光合作用是植物和一些其他生物利用光能将二氧化碳和水转化为葡萄糖的过程，并释放氧气作为副产物。光能被绿色色素叶绿素捕获，并转化为储存在葡萄糖中的化学能。
The word equation is the first thing examiners expect you to recall:
文字方程式是考官期望你首先回忆的内容：
carbon dioxide + water → glucose + oxygen
(in the presence of light and chlorophyll)
二氧化碳 + 水 → 葡萄糖 + 氧气（在光照和叶绿素存在条件下）
Notice that the arrow is not reversible under normal plant conditions. Photosynthesis is an endothermic process because it requires energy input from light. The glucose produced may be used immediately in respiration, converted for storage, or transported to other parts of the plant.
请注意，在正常植物条件下这个箭头是不可逆的。光合作用是吸热过程，因为它需要来自光能的输入。产生的葡萄糖可以立即用于呼吸作用、转化为储存物质，或被运输到植物其他部位。
2.
Published by TutorHao | IGCSE Biology Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导