Light Reaction
Chapter Name : Photosynthesis In Higher Plants |
Sub Topic Code : 103_11_13_05_01 |
Topic Name : Light Reaction |
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Sub Topic Name : Light Reaction |
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Introduction
The light reaction is the first step of photosynthesis towards the synthesis of starch.
Pre-Requisites:
Starch, ATP
Activity:
Put a plant in a dark room for several days. After several days the plant will eventually die because of lack of light.
Real Life Question:
What is the first step of preparation of food for plants?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Starch | Starch is a carbohydrate consisting of a large number of glucose units joined by glycosidic bonds. |
| ATP | Adenosine-5'-triphosphate (ATP) is a nucleoside triphosphate used in cells as a coenzyme. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Plant in a tub | To observe its growth. |
Real life uses :
We should plant trees where there is better sunlight.
Places to visit :
Visit your garden where various plants are using sunlight for its growth.
Practical examples around us
| Examples | Explainations |
|---|---|
| Plants | Plants that grow in better sunlight are healthy. |
What you learn in Theory:
Light reaction is the first step of photosynthesis.
What you learn in Practice:
Plant absorbs light energy from the sun and uses it for growth.