Metabolismo

UNIT 1 Cell Metabolism: Photosynthesis, cellular respiration and fermentation

Chapter 8 Photosynthesis
8.1 energy and Life
Session 1 Diagnostic activity- Answer the questions in plenary.
1- What is photosynthesis?
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2- Name three examples of organisms that carry out photosynthesis.
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3- What is the importance of photosynthesis to living things?
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Chemical energy and ATP
ATP as a Charged Battery An analogy takes two things that seem to be different and shows how they can be similar.
1. How is a partially charged battery like ADP?

2. Why do cells contain only a small amount of ATP?
A. ATP cannot store large amounts of energy for a long time.
B. ATP releases energy too quickly.
C. ATP cannot carry out activetransport.
D. ATP has only two phosphate groups.

Chemical Energy and ATP
Chemical Energy Living things use chemical fuels. One of the most important compounds that cells use to store and release energy is ATP.
Follow the directions. Then answer the questions.
1. Trace the outlines of the adenosine molecule and the three phosphate groups.
2. Cut out each phosphate group.
3.Arrange the phosphate groups on the adenosine molecule to form a molecule of ATP.






4. When ATP is changed to ADP, it releases energy. Change your ATP molecule so that it forms ADP. What change did you make?
5. ADP can be converted into ATP. Change your ADP molecule into ATP. What change did you make?
6. Fill in the blanks with two or three. The primary difference inthe structures of ATP and ADP is that ATP has phosphate groups and ADP has phosphate groups.

Write a brief summary that mentions the importance of the ATP molecule regarding how it stores and releases energy.
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Session 2
Heterotrophs and autotrophs
Fill in the following table.
| Heterotrophs | Autotrophs |
Define the term |____________________________________________________________

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Example | | |

History of the discovery of photosynthesis
Write the contributions that the following scientist made on photosynthesis.

Jan Baptiste van Helmont____________________________________________________________

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Joseph Priestley ____________________________________________________________

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