Transcript Cell Powerpoint - stephanieccampbell.com

Chapter 4 - Cell Structure and Function
The printed out notes are more detailed than these slides, you are expected to read the chapter and
your notes - anything is fair game on the test, but the cell chapter is largely review.
Quick: Grab some scratch paper and quickly discuss with your
partner what you remember from freshman biology about the cell.
Early Contributions
Hooke
Leeuwenhoek
Schleiden
Schwann
Virchow
The Cell Theory
1. Every living organism is
made of one or more cells.
2. The cell is the basic unit
of structure and function. It
is the smallest unit that
can perform life functions.
3. All cells arise from preexisting cells.
*Why is the Cell Theory
called a Theory and not
a Fact?
Figure 4.3
Single Cheek Cell - at different illuminations
ALL CELLS HAVE:
1. Cell Membrane
Phospholipid Bilayer (double layer)
2. Genetic Material
3.
Cytoplasm (cytos
ol)
ORGANELLES float
within cytoplasm and
perform specific
functions
Prokaryote vs Eukaryote Cells
Endosymbiosis
theory:
*Mitochondria &
Chloroplasts have their
own DNA, and may
have existed
independently at one
time
Animation at Microbiological
Concepts
Prokaryote Cells
Figure 4.4a
Eukaryotes
Quick Recap.......
1. What are the two main types of cells?
2. Which one is larger?
3. Which one does not have a membrane bound nucleus?
4. What are the three main parts of the cell (that all cells
have)?
5. What are the 3 components of the cell theory?
6. What theory explains how eukaryotes evolved?