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Cell Structure

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Cell Structure & Function Chapter 7.1 & 7.2 Discovery of Cell Robert Hook Used early microscope to look at cork cells Thought they were empty! Anton van Leeuwenhoek ... – PowerPoint PPT presentation

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Title: Cell Structure


1
Cell Structure Function
  • Chapter 7.1 7.2

2
Discovery of Cell
  • Robert Hook
  • Used early microscope to look at cork cells
  • Thought they were empty!
  • Anton van Leeuwenhoek
  • Observed pond water
  • WOW! So much stuff in the water

3
Cell Theory
  1. All living things are made of cells
  2. Cells are the basic units of structure function
    in living things
  3. New cells are produced from existing cells

4
PRACTICE
  • Draw this on your paper
  • Write theory, paraphrase it, draw a picture!

Cell Theory Paraphrase Picture



5
TWO Cell Types
  • Prokaryotic Cells
  • Eukaryotic Cells

6
Prokaryotes vs Eukaryotes
  • Prokaryotes
  • -small, simple
  • -DO NOT have NUCLEUS
  • -HAVE DNA
  • -HAVE cell membrane
  • -grow, reproduce
  • -can move (flagellum)
  • -usually bacteria
  • Eukaryotes
  • -large, complex
  • -contain organelles
  • -HAVE NUCLEUS
  • -DNA inside NUCLEUS
  • -Have cell membrane
  • -plants, animals, fungi

7
Prokaryotes vs Eukaryotes
  • Prokaryote
  • Eukaryote

8
QUESTION
  • How are prokaryotes and eukaryotes similar??

9
QUESTION
  • How are prokaryotes and eukaryotes different??

10
  • Eukaryotic Cell Structures

11
Organelles
  • Structures in the cell
  • little organs

12
Cytoplasm
  • Outside nucleus
  • Holds organelles in place
  • Like jello

13
Nuclear Envelope
  • Surrounds nucleus
  • Allows information to move into and out of
    nucleus

14
NUCLEUS
  • Contains all cells DNA
  • Holds instructions for making proteins
  • Brain of the cell

15
Chromatin Chromosomes
  • Chromatin
  • DNA bound to protein
  • Hangs out in nucleus
  • Chromosomes
  • When chromatin condenses
  • Contains genetic info

16
Ribosomes
  • Where proteins are made
  • Made up of RNA other proteins
  • Live in cytoplasm
  • Make proteins from instructions that come from
    nucleus

17
Endoplasmic Reticulum
  • Where parts of cell membrane are made
  • Proteins can be made here too
  • Rough vs. smooth
  • Rough ER has ribosomes
  • Smooth ER does NOT have ribosomes

18
Lysosomes
  • clean up crew
  • Filled with enzymes that break down things
  • Remove junk in cells

19
Vacuoles
  • Cell storage
  • Store proteins, water, salt, etc
  • Plants have LARGE central vacuole
  • Filled with H2O!

20
Chloroplasts
  • Only in plant cells
  • Capture energy from sun and turn it into glucose
    ? photosynthesis
  • solar power plant

21
Mitochondria
  • Turn energy from food into energy cell can use
  • Has its own special DNA
  • Powerhouse of cell

22
Cytoskeleton
  • Helps cell keep its shape
  • Helps cell move

23
  • VIRUSES

24
What is a virus?
  • NOT ALIVE
  • Reproduce by infecting living cells

25
Viruses
  • Made up of 2 main structures
  • DNA or RNA
  • Protein coat (capsid)
  • ? Allows virus to enter cell and infect it

26
Viruses
  • Depend on CELLS to help them live, reproduce, and
    grow
  • Cant do any of these without host cell
  • Only infect cells they are designed to infect
  • Ex plant virus only infects plant cells
  • Bacteriophage virus infects bacteria
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