Note to teachers: I have received several e-mail requests for the answers to the questions on this work sheet. I cannot provide these since I have no way of knowing which requests are from teachers and which are from students trying to get out of an assignment!

The "Virtual Cell" will allow you to get a close-up view of several organelles in 3-D! You will be able to choose certain organelles within the cell and manipulate them by zooming in on the organelle, rotating the image, and dissecting several organelles to view their contents. The intent of the activity is to provide you with a better feeling of the appearance (structure), function, and location of the organelles.

You should explore the following organelles within "The Virtual Cell": Please check them off as you go.

1. Mitochondria
2. Centrioles
3. Smooth Endoplasmic Reticulum (ER)
4. Rough Endoplasmic Reticulum (ER)
5. Lysosomes
6. Golgi Body
7. Nucleus (chromatin, nucleolus, ribosomes)

*** The "Virtual Cell" will provide you with more information to add to your Organelle Table.

I. Click on the "Virtual Cell Tour" and answer the following questions:

1. Describe the process in which proteins are packaged by the golgi body.

2. Describe the structure of lysosomes.

3. What are the functions of lysosomes.

4. What is autolysis?

5. Describe the outer and inner structure of mitochondria.

6. Why is the inner membrane of mitochondria ruffled?

7. Where might have mitochondria originated from? Why?

8. Describe the arrangement of microtubules that compose the centrioles. (Hint: look carefully at the image)

9. Describe the outer membrane of the nucleus.

10. Describe the inner contents of the nucleus.

11. Describe the appearance of the nucleolus.

12. Describe the appearance of the endoplasmic reticulum.

13. What makes rough ER "rough"?

II. Once the tour is complete, Click on the "Text Book" to discover more information about the organelles that you are responsible for.

Work sheet provided by Mr. David Gauthier/ Mr. Ted Cotter Unit II Sophomore Biology

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