Modeling Products & Reactants of Photosynthesis & Cellular ...
Modeling Products & Reactants of Photosynthesis & Cellular Respiration
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Introduction:
Photosynthesis is the process by which plants use the energy from sunlight to produce sugars such as glucose, which cellular respiration converts into ATP, the "fuel" used by all living things. The photosynthetic process uses water and carbon dioxide and releases the oxygen that we absolutely must have to stay alive. We can write the overall reaction of this process as: 6H2O + 6CO2 ---> C6H12O6+ 6O2
Cellular respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water. The energy released is trapped in the form of ATP for use by all the energy-consuming activities of the cell. During Cellular Respiration, sugar is broken down to CO2 and H2O, and in the process, ATP is made that can then be used for cellular work. The overall reaction for cellular respiration:
C6H12O6 + 6O2 ---> 6CO2 + 6H2O + ~36 to 38 ATP
Overall, it is the reverse reaction of photosynthesis, but chemically, the steps involved are very different.
Hypothesis:
The reactants and products of photosynthesis and cellular respiration are three-dimensional molecules.
Materials:
The materials needed for the lab Introductory Molecular Model Set --- 82 V 1107; Ward's scientific .
Procedure:
Construct each of the following molecules (teacher must check off each of your constructions):
1. Glucose – C6H1206
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2. Carbon dioxide – CO2
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3. Water - H2O
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4. Adenosine triphosphate – ATP
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Questions:
1. Glucose is what type of sugar --- monosaccharide, disaccharide, or polysaccharide?
2. How does a plant obtain carbon dioxide for photosynthesis, and how does it enter the plant?
3. In what plant organ does photosynthesis occur?
4. What is the source of the carbon in the sugars made by plants?
5. The oxygen released by plants comes from what reactant in photosynthesis?
6. Inside what organelle does photosynthesis occur?
7. The energy for photosynthesis is ___________________.
8. Where is this energy stored in glucose?
9. Name the process that breaks down sugars to release energy to do cellular work.
10. What energy molecule is used by cells to do work?
11. What waste gas is given off during cellular respiration, and how does this help plants?
12. Where does cellular (aerobic) respiration occur in plants and animals (organelle name)?
13. Which bonds of ATP are high energy bonds?
14. What sugar is found in ATP?
15. How do cells use the energy from ATP?
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