Prokaryotic and Eukaryotic Cells  Catalyst  Are green, growing leaves alive? Why/why not?  Are computers alive? Why/why not? Write in complete sentences! Don’t talk during the Catalyst!

Objectives  By the end of today, SWBAT…  Compare prokaryotic and eukaryotic cells  Describe the role of DNA, the cell membrane, cytoplasm, and the nucleus in the cell

Why do we care about cells?  You are alive  Parts of you are alive!  Parts of those parts are alive!  Where does it end?  The cell!  The cell is the smallest form of life  ALL living organisms are made of cells

Human Red Blood Cells

White Blood Cell Attacking Bacteria

Human Sperm Cell

Human Egg Cell

What makes them different?  Key Point #1: The function of a cell (what it does) is determined by its structure (what it is made of)  DNA (deoxyribonucleic acid) is the genetic code that instructs the cell how to run (it’s what makes you “you”)  Organelle: Part of a cell

Cell membrane  The cell membrane is a thin, flexible barrier around the cell  It controls what goes in and out of the cell  All cells have this

Cytoplasm  The cytoplasm is everything inside of the cell membrane  The cytoplasm contains all the cell organelles  All cells have this

Nucleus  Nucleus holds DNA and controls the cell’s activities  The cell’s own mini- brain  The nucleus has its own special membrane

Eukaryotic cells  Eukaryotic cells have a nucleus  All multi-celled organisms are eukaryotes  So all PLANTS and ANIMALS are eukaryotes

Prokaryotic cells  DNA is floating in the cytoplasm  Always single-celled organisms

Quick Recap Eukaryotic?Prokaryotic? Cell Membrane Yes CytoplasmYes NucleusYesNo DNAYes, inside of nucleus Yes, floating in cytoplasm

Independent Study Time  Take a few minutes to study your note cards.  If you realize that you don’t understand what you wrote down…  Take notes in your own words!  Ask your group-members  Raise your hand and ask me for help

“Throw your hands in the aaaaair” (GP)  First round  Discuss in groups  Second round  Try on your own

Where all cell organelles are found

Controls everything that happens in the cell.

Prokaryote or Eukaryote?

Found on the edge of the cell.

If this got destroyed, the cell could not control anything

Prokaryote or Eukaryote?

Everything inside of the cell membrane.

Missing in prokaryotes.

All plants and animals are this type of cell

ALL CELLS have these TWO things. (Hold up both cards.)

If this were missing, the cell could not control what goes in and out

In eukaryotes, DNA is found here.

Prokaryote or Eukaryote?

Which of the following is true? 1. What enters/leaves the cell is controlled by “A” 2. The presence of “B” makes this a eukaryotic cell 3. The presence of “B” makes this a prokaryotic cell 4. “C” is found in ALL cells B C A

Quiz your partner  Choose a partner at your table, and (using the flash cards) quiz him/her  Be difficult!  Ask anything we have learned today  Don’t take an answer unless it is perfect  What we have learned today is fundamental to everything else we will learn about the cell… so get it right!!!

Exit Questions 1. What is the big difference between eukaryotic and prokaryotic cells? 2. Describe what TWO out of these three things do in the cell: cell membrane, cytoplasm, nucleus Write in complete sentences! Don’t talk during the Exit Question!