Unit 2 - Energy and Metabolism (Photosynthesis & Respiration); Cell Structure

Reading Assignment: Chapters 4-8
Assignment Type: Individual Project Deliverable Length: Table and questions
Points Possible: 125 Due Date: 10/18/2009 11:59:59 PM CT


Cellular Respiration and Photosynthesis co-exist as paired metabolic processes.

Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced as a by product during photosynthesis. This reaction stores energy in the chemical bonds of glucose.

Sugar and other carbohydrates are used as fuel sources by cells. During the process of Aerobic Cellular Respiration, glucose is broken down using oxygen. This reaction releases energy which is used to create ATP molecules, the energy carrier molecule of cells. The process also releases Carbon Dioxide as a byproduct.



Part 1: Download and fill out this table to compare and contrast Photosynthesis and Aerobic Cellular Respiration. You will submit the completed table for Part 1.

Click here for a copy of the table.


Photosynthesis
Aerobic Cellular Respiration

Full balanced equation



Reactants



Products



Is this reaction endergonic or exergonic? State which one it is.



Energy source used



Cell organelles involved in the reaction



Role of ATP in the reaction




Part 2: After completing the table you will have a basic understanding of these two complementary metabolic processes. Using what you have learned, and additional reference information, answer the following questions.

What is the name given to the types of organisms that can use photosynthesis to produce glucose? In addition, provide THREE specific examples..
What is the name given to the types of organisms that exclusively use aerobic cellular respiration to break down glucose to produce ATP for energy? In addition, provide THREE specific examples.
If oxygen is lacking, how might cells meet their energy needs through fermentation? Explain and give some examples of cells that can do this.
Both photosynthesis and aerobic cellular respiration are examples of complex metabolic pathways, consisting of many linked chemical reactions that require enzymes to function. Briefly, explain two (ONLY TWO) attributes of enzymes in catalyzing chemical reactions and in metabolic pathways.
Be sure to list and cite in APA, all references used to prepare both parts of this IP assignment.

For information on Macintosh Word shortcuts, click here.

Submit both parts 1 and 2 of your assignment.




Instructor Comments:
Be sure to look at the assignment itself as there is useful information there.



And attend the live chat or review the chat archives as I will cover what you need for completing both parts of the assignment. Look at the PowerPoint slides for the chat too.

The table - just fill out the rows for both photosynthesis and aerobic respiration. For example, row 1, write in the full balanced equation for photosynthesis, write in the full balanced equation for aerobic cellular respiration and so on for each row.

There is also much valuable information in the assignment background info and the graphic shown above.

Look up and understand clearly the difference between an organelle and organism.





The grading rubric is the same as posted for IP 1.

Assignment Type: Discussion Board Deliverable Length: 3-4 paragraphs
Points Possible: 70 Due Date: 10/18/2009 11:59:59 PM CT


There are two main types of cells: prokaryotic and eukaryotic.

Bacterial cells are prokaryotic. Select two structures of bacterial cells and briefly describe them; what do they look like, what are they composed of? Then, explain how these two structures allow bacterial cells to survive as unicellular organisms.
There are many examples of eukaryotic cells. Algae, Fungi, Plants, and Animals are all composed of eukaryotic cells. Some algae and fungi are unicellular organisms, but other algae and fungi, and all plants and animals are multicellular organisms that are composed of specialized eukaryotic cells that interact to support the life of the multicellular organism.
Choose either a plant or an animal cell. Choose two structures or organelles of the cell (not used in part one above.) Describe these two structures or organelles – what do they look like, what are they composed of? Then explain how these plant or animal cell structures or organelles function. How do these functions support activities of the plant or animal cell and enable survival of the multicellular plant or animal organism?

In your own words, please post a response to the Discussion Board and comment on other postings. You will be graded on the quality of your postings.




Instructor Comments:
See table 4-1 page 62 as a good starting point for this assignment.

In PART 1 :
A) Select two structures of bacterial cells; structures in the cells, not types of bacteria.
B) briefly describe them - what do they look like; what is their molecular structure?
C) Then, explain how these two structures function to allow bacterial cells to survive as unicellular organisms.



In PART 2:



A) Choose either a plant or an animal cell.
B) Choose two structures or organelles of the plant or animal cell (not used in part one above.)

C) Describe these two structures or organelles – what do they look like, and what is their molecular structure?

D) Then explain how these plant or animal cell structures or organelles function to support the cell and the multicellular plant or animal. .


The grading rubric is the same as posted for DB 1.