Download Name

Cells Alive- Internet Lesson
Name ______________________
URL: www.cellsalive.com
Date ______________Block__________
Objective: You will look at computer models of cells; learn the functions and the descriptions of
the cells and their components.
Navigating the site: Cells alive has a navigation bar at the top, after accessing the page, click on
CELL BIOLOGY under contents. From here, you will access the links:
PART A: "How Big is a.."
PART B-F Cell Models which will have
 Cell Models
 The bacterial cell model.
 The animal cell model, and
 The plant cell model.
Part A. "HOW BIG IS A...."
Here you will look at objects found on the head of a pin. Your job is to rank them in order of size
on the chart below and estimate the length of each (in nanometers, micrometers, or millimeters).
The line in the bottom right corner of the screen is used to help you estimate. Sketch each of the
objects. (Click START THE ANIMATION to get started) *Change the magnification to utilize the length scale.
Object
Human hair
Dust Mite
Red Blood Cells
E. coli
Staphylococcus
Ebola virus
Rhinovirus
Sketch
Size in nanometers, micrometers
or millilmeters
Part B: Cell Models:(you will need to return to the “cell biology” link to access this page under
contents)
1. What two general classes are cells divided into and what is the classification based upon?
2. Give a brief description of eukaryotic cells
3. Give a brief description of prokaryotic cells
Part C: Prokaryotic Cell Model - (you will need to return to the "Cell Models" link to access
this page, it is on the top) Click the START THE ANIMATION button to get started
Label the following Diagram:
Briefly describe the function of each organelle in the diagram:
1.
2.
3.
4.
5.
6.
7.
Part D: Animal Cell Model - (you will need to return to the "Cell Models" link to access this
page, it is on the top) *Click the Eukaryotic Cell to get to the animal and plant cells models.
For this model, you will need to click on the various parts of the cell to go to a screen that tells you
about the parts. Answers to the following questions are found there.
1. What do mitochondria do?
Sketch each of the following.
Mitochondria
2. How big are mitochondria?
3. What does the Golgi Apparatus do?
4. What is the difference between smooth and rough ER?
Lysosome
5. What does the nucleus look like?
6. What does the nucleus store and what else does it do?
Golgi Apparatus
7. What does the cytoskeleton do?
8. Cytosol goes by what other name?
Rough ER
9. What is the function of the cytosol?
10. What is the function of the lysosome?
Part E: Plant Cell Model - (you will need to return to the "Cell Models" link to access this page)
1. What other type of cell has a cell wall?
Sketch the following
Chloroplast
2. What is the function of the Chloroplast?
3. In plant cells, what does the vacuole do?
Vacuole
Part F: Overview
For the chart below, place a check in the box if the cell has that component.
Plant
Chloroplast
Vacuole
Ribosome
Mitochondria
DNA
Endoplasmic Reticulum
Cell Wall
Golgi Apparatus
Centrioles
Animal
Bacteria
Name _____KEY_________________
Date ______________Block__________
Cells Alive- Internet Lesson
URL: www.cellsalive.com
Objective: You will look at computer models of cells; learn the functions and the descriptions of
the cells and their components.
Navigating the site: Cells alive has a navigation bar at the left, after accessing the page, click on
CELL BIOLOGY on the left side navigation bar. From here, you will access the links: 1) "How Big is
a..", 2) the bacterial cell model. 3)the animal cell model, and 4)the plant cell model.
Part A. "HOW BIG IS A...."
Here you will look at objects found on the head of a pin. Your job is to rank them in order of size
on the chart below and estimate the length of each (in nanometers, micrometers, or millimeters).
The line in the bottom right corner of the screen is used to help you estimate. Sketch each of the
objects.
Object
Sketch
Size in nanometers, micrometers
or millilmeters
2pts
Human hair
125-150 micrometers
2pts
2pts
Dust Mite
225-250 micrometers
2pts
2pts
Red Blood Cells
5-10 micrometers
2pts
2pts
E. coli
2 micrometers
2pts
2pts
Staphylococcus
0.5-1.0 micrometers
2pts
Ebola virus
2pts
100 nanometers wide
1000 nanometers long
2pts
2pts
Rhinovirus
25-30 nanometers
2pts
Part B: Cell Models:You will need to return to the “cell biology” link to access this page, or hit
your back button
4. What two general classes are cells divided into and what is the classification based upon?
2pts
Prokaryotic and Eukaryotic
5. Give a brief description of eukaryotic cell.
2pts
They are highly structural and has a nucleus
6. Give a brief description of prokaryotic cells
They are simply structural and do not has a nucleus
Part C: Bacterial Cell Model – On the top of the Cell Models page
Label the following Diagram:
Briefly describe the function of each organelle in the diagram:
1. Flagellum – long appendages which rotate throughout the cell
2. Pilus – hair-like structures that allow the bacteria to attach to other cells for protein
3. Nucleoid – the DNA in the bacteria cells. It is confined in the central region.
4. Plasma membrane – Lipid bilayer much like the plasma membrane of other cells
5. ribosomes – Gives the cytoplasm of bacteria an appearance
6. Cell wall – maintains the overall shape of a bacteria cell
7. Capsule – the layer that protects the bacterial cell
Part D: Animal Cell Model - (you will need to return to the "Cell Biology" link to access this
page, or hit your back button)
For this model, you will need to click on the various parts of the cell to go to a screen that tells you
about the parts. Answers to the following questions are found there.
1. What do mitochondria do?
Sketch each of the following.
Provides the energy a cell needs to do things
Mitochondria
2. How big are mitochondria?
About the size of a bacteria
3. What does the Golgi Apparatus do?
Stack of membrane bound vesicles that are important to package
micromolecules throughout the cell
Lysosome
4. What is the difference between smooth and rough ER?
Smooth controls various functions and Rough collects and transfers
ribosomes throughout the cell
5. Where is the nucleolus found?
6. What does the nucleolus do?
Golgi Apparatus
7. What does the cytoskeleton do?
Helps maintain the cells shape
8. Cytosol goes by what other name?
cytoplasm
9. What is the function of the cytosol?
Fluid that controls the cells metabolism
10. What is the function of the lysosome? Kill&digest
Rough ER
Part E: Plant Cell Model - (you will need to return to the "Cell Biology" link to access this page,
or hit your back button)
1. What other type of cell has a cell wall?
Sketch the following
Bacteria
Chloroplast
2. What makes the plant cells green?
Chloroplast
3. In plant cells, what does the vacuole do?
Stores nutrients and releases the cells waste products
Vacuole
Part F: Overview
For the chart below, place a check in the box if the cell has that component.
Plant
Animal
Chloroplast
X
Vacuole
X
X
Ribosome
X
X
Mitochondria
X
X
DNA
X
X
Endoplasmic Reticulum
X
X
Cell Wall
X
Golgi Apparatus
X
Centrioles
Bacteria
X
X
X
X
X