BACTERIA

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BACTERIA
SourceBacteria.wikipedia,the free encyclopedia
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Are bacteria larger or smaller than eukaryotic
cells?
smaller!
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Look at these photos and say which cell is
larger. Notice the scale.
E.coli
Paramecium sp
2 µm
50 µm
Which is the bacteria, E.coli or Paramecium?
Why?
E. coli
Pictures source oldearth.wordpress.com/microbios-
en-accionwww5.pbrc.hawaii.edu/microangela/param.h
tm
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And now, which cell is larger? Notice the scale.
Eukaryotic cell
Prokaryotic cell
2 µm
2 µm
Pictures sourceBacteria.wikipedia,the free
encyclopediawww.biochemistry.blogspot.com
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How many times smaller is this bacterium than
the eukaryotic cell?
Sourcewww.star.ucl.ac.uk
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So, one difference between bacteria and
eukaryotic cells is size Cell Size Bact
eria Eukaryota
smaller larger
More differences?
Yes, the nucleus!
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Bacteria have prokaryotic cells. This means that
they don't have nuclear membrane.
Prokaryotic cell Eukaryotic cell
DNA
2 µm
2 µm
nuclear membrane
Pictures sourceBacteria.wikipedia,the free
encyclopediawww.biochemistry.blogspot.com
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So, what is the difference between prokaryotic
and eukaryotic cells?
Cell Size Nucleus
Prokaryotic Eukaryotic
Small
No nuclear membrane
Big
Nuclear membrane
More differences?
Yes, the complexity.
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Look inside of these cells. Which is more complex?
2 µm
2 µm
Photo source wikipedia, the free encyclopedia
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Then, the differences between prokaryotic and
eukaryotic cells are
?
?
?
Size
Nucleus
Complexity
Cell
Prokaryotic Eukaryotic