Download cells - Mrs. Mulac`s Keystone Biology B

Agenda
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
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Think About It
Prokaryotic vs. Eukaryotic cells
Throw Your Hands in the Air
Exit Questions
KEYSTONE BIOLOGY B
Think About It …
Compare and contrast
newer inventions to the
predecessors: Meaning…
Compare and contrast the
new versions of inventions
to the ones that came
before.

Ex: The first telephone to a
smart phone.
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 minibrain

The nucleus has its
own special
membrane
So we have some organelles…
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To help you remember the function of each, create
an analogy in your notes.
Compare each cell organelle to a something else.
Something you know already.
The (cell organelle) is like a (make a comparison)
because it ______________________________.
What makes them different?

Key Point #2: Prokaryotic and
eukaryotic cells have different
structures
Eukaryotic cells

Eukaryotic cells have a
nucleus
 Membrane-bound
organelles
 All multi-celled
organisms are
eukaryotes
 So all PLANTS and
ANIMALS are
eukaryotes
 Can be single-celled
Prokaryotic cells

DNA is
floating in the
cytoplasm
Always
single-celled
organisms
Double Bubble (In your notes)
Prokaryotic
Cell
Eukaryotic
Cell
Quick Recap
Cell
Membrane
Cytoplasm
Nucleus
DNA
Eukaryotic?
Yes
Prokaryotic?
Yes
Yes
Yes
Yes, inside of
nucleus
Yes
No
Yes, floating
in cytoplasm
Study Time


Take 5 minutes to study your notes.
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”

First round
Discuss

in groups
Second round
Try
on your own
ROUND
ONE
(Groups)
Where all cell
organelles are
found
Controls everything
that happens in the
cell.
Prokaryote or Eukaryote?
Found on the edge of
the cell.
Prokaryote or Eukaryote?
Everything inside of
the cell membrane.
This cell is singlecelled, its traits are
controlled by DNA,
and has a nucleus
ROUND
TWO
(Individual)
Missing in
prokaryotes.
All plants and
animals are this
type of cell
ALL CELLS have these
TWO things.
Decides what gets to
go into the cell, and
what has to leave.
In eukaryotes, DNA is
found here.
Prokaryote or Eukaryote?
Which of the following is true?
1.
2.
3.
4.
What enters/leaves the cell is controlled by “A”
The presence of “B” makes this a eukaryotic cell
The presence of “B” makes this a prokaryotic cell
“C” is found in ALL cells
B
C
A
Quiz your partner
With the person next to you, use you notes to
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
Complete sentences!
Don’t talk!
1. Describe the differences between
eukaryotic and prokaryotic cells.
(Include at least two.)
2. Describe what TWO out of these
three things do in the cell: cell
membrane, cytoplasm, nucleus