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BELL RINGER [3 Minutes]
• Do Vocabulary K/S/H/D
• Write one thing that is MICROSCOPIC
• Write one thing that is MACROSCOPIC
MYP Biology: Introduction to Cells
What are the points of the Cell Theory?
1. The cell is the most basic
unit of LIFE.
2. All ORGANISMS are made
up of cells.
3. All new cells come from
PRE-EXISTING cells
There are two main types of cells
• Prokaryotic cells (Greek for ‘before nucleus’)
• Eukaryotic cells (Greek for ‘true nucleus’)
What do all cells have in common?
• DNA: The genetic material /
blueprint of the cell
• Cytoplasm: A jelly-like
substance the fills the
inside of the cell and
contains enzymes
What do all cells have in common?
• Cell Membrane: A
protective barrier that
controls what goes in and
out of the cell
• Ribosomes: Tiny cell parts
that produce proteins
Prokaryotic Cells
Prokaryotic cells are the smaller,
simpler variety of cells. They have
no nucleus or any other specialized,
membrane-bound organelles.
Only unicellular bacteria are made
up of prokaryotic cells.
Prokaryotic Cells
Eukaryotic cells
Eukaryotic cells are the larger,
more complex variety of cells.
Their DNA is contained in a section
of the cell called the nucleus. They
also contain a different types of
membrane-bound organelles that
perform specific functions.
Eukaryotic cells
Compare & Contrast Prokaryotes and Eukaryotes
SIZE
PROKARYOTIC
EUKARYOTIC
NUCLEUS? ORGANELLES?
DNA?
1-10 microns
NO
NO (tiny cell parts)
YES (free-floating)
10-100 microns
YES
YES
YES (in nucleus)

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