Photosynthesis- Light Dependent Reactions

Photosythesis takes place in two steps. In the first step, known as the light dependent reactions, light energy is converted into chemical energy held in the bonds of ATP and NADPH.

Expected Learning Outcomes

By the end of this course a fully engaged student should be able to

- list the parts of a photosystem
- discuss the function of a photosystem
- describe where the light dependent reactions of photosythesis occur and discuss why these reactions occur in this location
- describe cyclc electron flow, be able to explain both the energetic result and what chemcical changes occur
- describe non-cyclic electron flow, be able to explain both the energetic result and what chemical changes occur
- describe the cause and the result of chemiosmosis
- answer the question- "why doesn't photosynthesis stop after the production of ATP and NADPH in the light dependent reactions

Further Reading

Here is a link to some fairly detailed info about photosynthesis (it contains some very good diagrams).

http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html



Further Viewing

These videos contain animations that might help you to understand what is happening in the light dependent reactions. I encourage you to watch each of these videos.

1) This video has some great animations of what is going on in the light dependent reactions.

http://www.youtube.com/watch?v=hj_WKgnL6MI

2) This short video is a good review of the light dependent reactions.

http://www.youtube.com/watch?v=eY1ReqiYwYs&feature=related

3) This is a video of a woman with a very southern accent talking about photosyntheis with some decent animations.

http://www.youtube.com/watch?v=RFl25vSElaE&feature=related

4) This one comes complete with a "Photosyntheis Song." I guarantee that you will be humming this as you walk around campus!

http://www.teachertube.com/view_video.php?viewkey=dc9810ac32b3c413fb29