Showing posts with label Photosynthesis. Show all posts
Showing posts with label Photosynthesis. Show all posts

Sunday, February 15, 2015

Photosynthesis 2- The Light Independent Reactions



Lecture Video: http://mediacast.ttu.edu/Mediasite/Play/842d916401044c20a370989776ea66631d?catalog=4dc7289a-d3e0-4ae5-8fdc-5b86c027a06b


In the light independent reactions the energy stored in ATP and NADPH is converted to energy stored in glucose. This invovles a chemical cycle known as the Calvin Cycle.

Expected Learning Outcomes

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

- discuss what links the light dependent and light independent reactions of photosynthesis
- describe the initial step of the Calvin Cycle
- describe the chemical reaction catalyzed by the enzyme RuBP carboxylase
- discuss some interesting characteristics of RuBP carboxylase
- define "carbon fixation" and identify the carbon fixation step in the different modes of photosynthesis
- diagram the Calvin Cycle (at the level of detail that I talked about in class)
- discuss where and why ATP and NADPH are required in the Calvin Cycle
- disucus where in the cell that the Calvin Cycle takes place

Powerpoint Presentation

Here is a link to the powerpoint presentation that I used in class.

http://www.slideshare.net/MarkMcGinley/light-independent-reactions-of-photosynthesis

Further Viewing

1) This is an excellent animation (narrated by a man with a perfect "announcer's voice"). This animation goes into the amount of detail you are required to know for this class. It even has its own quiz, so see how you do.

http://highered.mcgraw-hill.com/sites/0070960526/student_view0/chapter5/animation_quiz_1.html

2) I didn't know that photosynthesis was such a popular subject for musicians (I can't belive I gave up what would surely have been a lucrative career as a rock star to become a biologist- who knew I could have combined the two). The guy in the video seems like kind of a dufus, but the song is pretty cool, and I learned something from watching it.

http://www.youtube.com/watch?v=OYSD1jOD1dQ

3)Maybe you will find this animation to be helpful

http://www.science.smith.edu/departments/Biology/Bio231/calvin.html

Photosynthesis 1. The Light Dependent Reactions




Lecture Videohttp://mediacast.ttu.edu/Mediasite/Play/842d916401044c20a370989776ea66631d?catalog=4dc7289a-d3e0-4ae5-8fdc-5b86c027a06b


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

A simple introduction to the process of photosynthesis
Photosynthesis- http://www.eoearth.org/article/Photosynthesis

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

Powerpoint Presentation

Here is the powerpoint presentation that I will use in class.

http://www.slideshare.net/MarkMcGinley/photosynthesis-light-dependent-reactions

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 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

3)Another explanation of light dependent reactions.

http://www.youtube.com/watch?v=BK_cjd6Evcw