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Cell Model Assignment

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Introduction:Cells are the basic unit of life; all cells come from other cells; all living organisms are composed of cells. These are the three postulates of the Cell Theory. Since cells are the basic unit of all life and all organisms have cells, there must be different types of cells.

The two major types of cells are eukaryotes (with a nucleus and membrane surrounded organelles) and prokaryotes (without a nucleus and other membrane bound organelles). Types of prokaryotic cells are Bacteria and Archaebacteria. These are small cells that are composed of cell membrane, cytoplasm, DNA, and ribosomes. Kingdoms Plantae, Animalia, Fungi, and Protista are made of eukaryotic cells. These are larger cells that have all the different organelles that you have been studying.

We are going to spend most of our time studying eukaryotic cells. These cells come in a variety of shapes: some are spheres, some are long wires, some are tubes, and some are even cubes. These cells all have different jobs for the organism. On this assignment we will be focusing on the general plant and animal cell.

red blood cells

nerve cell

http://www.biology-online.org/dictionary.aspmailto:[email protected],[email protected]


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Procedure: You and your partner are to create two 3D cell models out of playdoh to help you understand the structure and function of all the cell organelles you have been studying. One cell will be a general animal cell and the other cell will be a general plant cell.

Your models should represent cross sections of cells, with the appropriate 3D organelles on top. You will be graded on the appearance of your cell, whether or not the appropriate organelles are present, your groups ability to identify the organelles and define function, and how you represented the organelles out of playdoh. Be sure to look at the scoring guide as you make your models.

On Friday you and your partner will take an oral quiz. For this quiz, you will need to be able to point to five different organelles in each of the two cells, and tell its name and function. Your partner will need to know five different organelles. This will be your quiz grade on cell parts.

On the next page are the required organelles for your model, and the materials that you should use to represent these organelles. You will need to provide the playdoh, but all other materials will be in the classroom.

animal cell

plant cell



Names:

You and your partner are to create two 3D cell models to help you understand the structure and function of all the cell organelles. Your cells are to be a cross section of the cell, with 3D organelles on top.

Organelles

FORMCHECKBOX Cytoplasm

FORMCHECKBOX Endoplasmic Reticulum

FORMCHECKBOX Ribosomes

FORMCHECKBOX Mitochondria

FORMCHECKBOX Vacuole

FORMCHECKBOX Lysosomes

FORMCHECKBOX Chloroplasts

FORMCHECKBOX Cell Wall

FORMCHECKBOX Cell Membrane

FORMCHECKBOX Nucleus

FORMCHECKBOX Nuclear Membrane

FORMCHECKBOX Chromosomes

FORMCHECKBOX Golgi Apparatus

Scoring Guide

Appearance

Organelles Present

Groups ability to identify organelle and define location

Organelle Representation

Very neat (10)

All 13 appropriate items (20)

All 10 accurate ID and definitions, equal participation (15)

Very creative (10)

Neat (8)

At least 10 appropriate items (17)

At least 8 accurate ID and definitions, and /or somewhat unequal participation (13)

Creative (8)

Messy (7)

At least 8 appropriate items(15)

At least 6 accurate ID and definitions, and /or unequal participation (11)

Somewhat creative (7)

Very messy (6)

Less than 8 appropriate items (10)

Less than 6 accurate ID and definitions, and/ or VERY unequal participation (13)

Not creative, boring (6)

Cell Model Scoring Guide.doc


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Required Organelles and the materials that you should use.

Organelles MaterialsCytoplasm alternative colorER yarnRibosomes pepperMitochondria purpleVacuole redLysosomes white beansChloroplasts greenCell Wall aluminum foilCell Membrane plastic wrapNucleus blueNuclear Membrane plastic wrapChromosomes pencil shavingsGolgi Apparatus alternative playdoh colorNucleolus yellow

Look at the next page for examples from last year.



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What is the major problem with the cell model to the left?

What score would you give the cell model above for neatness? What could you do to make sure this does not happen to your model?

Try to think about creative ways to represent your organelles. For example these students made the mitochondrion look like it had two membranes by adding the red playdoh.

http://www.biology-online.org/dictionary.aspmailto:[email protected],[email protected] is a plant cell with chloroplasts and cell wall, but it is a circle and should be a square.

Be sure to keep the playdoh wrapped in plastic wrap to keep the model from drying out.

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