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Cell Organelles
HOW DOES A CELL DO ITS JOB?
WHAT IS THE RELATIONSHIP BETWEEN A
CELL AND ITS ORGANELLES?
What jobs do cells do?
 Some examples:
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Making proteins, like keratin (hair follicles)
Sending signals (nerve cells)
Turning sunlight into glucose (leaf cells)
Contracting for movement (muscle cells)
Organelles Cooperate
Organelles work together to allow the cell
to accomplish its job.
The Nucleus
 Controls the cell by giving directions to make
proteins, especially enzymes.
 It also contains DNA and copies its genetic material
so that when the cell divides, the new cell is exactly
the same as the original.
Ribosomes
 Ribosomes are the site of protein production.
 Located on the endoplasmic reticulum
Endoplasmic Reticulum (ER)
 A system of folded membranes that transport
proteins within the cell
Golgi Complex
 G.A. tags proteins and exports them outside the cell
in membrane bubbles called vesicles.
Lysosomes
 Membranous sac filled with enzymes (certain type of
protein) that break down used organelles and large
molecules
Vacuoles
 Vacuoles are sacs that
store water and other
materials
 Vacuoles are in plant
cells.
Chloroplasts
 Capture the sun’s energy to make glucose in plants
and algae. The energy is stored in chemical bonds.
Mitochondria
 Bonds are broken in molecules of glucose to release
energy which is stored or used as ATP.
Cell Membrane
 Regulates what enters and leaves the cell.
Cell wall
 The cell wall provides support to plant cells and
bacteria.
Cytoplasm
 The region between the
cell membrane and the
nucleus.
Self Assessment
 Level 1=I have never seen this word
 Level2=I think I have seen this word,
but I don’t know what it means.
 Level 3=I have seen this word and it
has something to do with…
 Level 4= I know this word. I can use it
in my speaking, reading, writing, and
listening.
Exit Slip
 Pick one organelle of the cell. What might happen to
the cell if you were to take that organelle away.