Introduction
Photosynethis is the process of converting light energy to chemical energy and storing it in the bonds of sugar. This process occurs in plants and some algae (Kingdom Protista). Plants need only light energy, CO2, and H2O to make sugar. The process of photosynthesis takes place in the chlorplasts specifically using cholorphyll the green pigment involved in photosynthesis.
Task
- Your task is to find the key factors that makes up photosynthesis on various websites.
- Read the directions carefully and answer all the questions, and make sure you write down all websites you used.
- Summarize the process of photosynthesis.
Process
o the interactive photosynethesis project
http://www.wiley.com/college/boyer/0470003790/animations/photosynthesis/photosynthesis.html
List factors about photosynthesis
http://biology.about.com/od/plantbiology/a/aa050605a.html
watch the video, list 5 facts
http://vcell.ndsu.edu/animations/photosynthesis/movie-flash.html
Evaluation
1.) In photosynthesis, what is the fate of the oxygen atoms present in CO2? They end up ______.
2.) The most important role of pigments in photosynthesis is to ______.
3.)The light reactions of photosynthesis generate high-energy electrons, which end up in ____. The light reactions also produce ____ and ____.
4.) The pigment molecules responsible for photosynthesis are located in the
A.)mitochondria
B.) cytoplasm of the cell
C.)troma of the choroplast
D.)thylakoid membrane of the chloroplast
E.) all of the above
5.) The primary form of sugar transported from the site of photosynthesis to the rest of the plant is:
A.) glyceraldhyde 3-phophate
B.) glucose
C.) frutose
D)ribulose 1,5-biphosphate
E.) sucrose
6.) Light is required for the light dependent reactions because
A.)it is the source for electrons
B.)it splits the water molecule
C.)it energizes electrons in the reaction center
D.)it splits ATP molecules which generates the energy necessary to power the light independent reactions
E.) none of the above
7.) Which of the following occurs in the stroma of the chloroplast?
A.)light dependent reaction
B.)electron transport chain
C.)calvin cycle
D.) photolysis
8.) Which of the following is NOT a produce of the light dependent reaction?
A.)Oxygen
B.)ATP
C.)NADPH
D.)Sugar
9.) Carbon fixation is catalyzed by what enzyme?
A.) P700
B.) NADPH
C.) phosphoglycerate
D.) rubisco
10.)Summarize all you know about photosynethesis
Conclusion
"Photosynthesis is the process in which light energy is used to raise electrons in chlorophyll to a higher energy level (energise them) which are then passed on to an electron carrier system that extracts this energy and uses it to produce ATP molecules. In another process light energised electrons from chlorophyll are passed to NADP+ to produce NADPH. The electrons lost from chlorophyll in both processes above are replaced by electrons from water producing oxygen in doing so. The ATP and NADPH so produced are used to reduce carbon dioxide to the three carbon sugar glycerate 3-phosphate,
G3P, which is subsequently used to make the six carbon sugar glucose.
Credits
Amber Lee
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