Cell Structure and Function
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Transcript Cell Structure and Function
Cell Structure and Function
OBJECTIVE
Today we will talk about the difference
between prokaryotic and eukaryotic cells.
We will also review for the quiz tomorrow by
playing a game!
The Cell Theory
All living things are composed of cells.
Cells are the basic units of structure
and function in living things.
New cells are produced from existing
cells.
Types of Cells
Two kinds of cells depending on whether
they have a nucleus
Eukaryote
Prokaryote
Genetic
material
Prokaryotes
Usually small and simple
Genetic material (DNA)
is not contained in a
nucleus
The ONLY prokaryotes
in the world are
BACTERIA.
Prokaryotic Cells
Eukaryotes
Usually larger and more
complex than
prokaryotes.
May be unicellular like
an amoeba or
multicellular like a plant
Contain dozens of
specialized structures
called organelles.
Includes protists, fungi,
plants and animals.
Eukaryotic cells
Lysosomes-The Clean Up Crew
Function:
Breakdown of lipids,
carbohydrates and
proteins into small
molecules to be used by
the rest of the cell
Breakdown used up
organelles
Get rid of all “stuff” in
the cell
Structure:
Small, filled with
enzymes
Plant vs. Animal Cell
Vacuoles - Storage
Function:
Stores water, salts,
proteins and
carbohydrates
Structure:
Sac-like
Plant cells have one
large central vacuole
Animal cells have many
small vacuoles
Chloroplasts – Energy in Plants
Function:
Captures energy from the
sun (solar energy) and
changes it into food
(chemical energy) for plants
(photosynthesis)
Structure:
Surrounded by two
membranes
Contains own genetic
information like
mitochondria
Contains green pigment
called chlorophyll
Not found in animal cells!
CILIA/FLAGELLA
Cilia are short hair-like structures that help the cell move
around.
Flagella are long whip-like structures that also assist the
cell in moving.
Cell Wall
Function:
Provides support and
protection for the cell
Structure:
Lies outside the cell
membrane
Found in plants, algae,
fungi and many
bacteria
NOT FOUND IN
ANIMAL CELLS!