In this lesson you will learn about how plants capture light energy and use it to make chemical energy ATP and reducing power, NADPH
By the end of this lesson, students should be able to:
- explain the dual nature of light and how biologist study light absorption and transmittance by pigments or molecules.
- describe how light interacts with pigments and causes excitation of chlorophyll molecules.
- describe, compare and illustrate the matter and energy transformations that occur during the process of photosynthesis, including the role of oxygen and chloroplasts
- use appropriate terminology including, light harvesting, chlorophyll, thylakoids, photosystem, electron transport chain, photophosphorylation, cyclic, noncyclic, reduction/oxidation etc.
- explain the chemical changes and energy conversions associated with the process of photosynthesis.
- identify the components in the chloroplast where the light reactions take place.
- explain how photophosphorylation occurs
- compare and contrast cyclic and non-cyclic (linear) photophosphorylation.
Let’s start by examining the principles governing the behaviour of light and how it is capture by pigments presented in the video lesson below. Please continue to take thorough notes as you watch each video lesson.
Next, let’s look how sun energy is funnel through the Thylakoids’ various components to produce energy as ATP and reducing power as NADPH in the video lesson below.
The Light Dependent Reactions Activity
Learning goal: To describe in detail the components of the photosynthetic apparatus in the chloroplast, the capturing of light and the flow of electrons through the ETC and lastly the production of NADPH and ATP.
Your job: To watch the animation below and then produce a flow chart describing the flow of electrons through the ETC and the production of ATP and NADPH.