thick peptidoglycan layer

1
Gram negative
Gram positive

• thick peptidoglycan layer
• plasma membrane

• outer membrane
• thin PG layer
• plasma membrane

Bacillus anthracis
E. coli O157H7
2
Gram negative
Gram positive

• thick peptidoglycan layer
• plasma membrane

• outer membrane
• thin PG layer
• plasma membrane

Bacillus anthracis
E. coli O157H7
3
Gram negative
Gram positive

• thick peptidoglycan layer
• plasma membrane

• outer membrane
• thin PG layer
• plasma membrane

Bacillus anthracis
E. coli O157H7
4
Gram negative
Gram positive

• thick peptidoglycan layer
• plasma membrane

• outer membrane
• thin PG layer
• plasma membrane

Bacillus anthracis
E. coli O157H7
5
Gram negative
Gram positive

• thick peptidoglycan layer
• plasma membrane

• outer membrane
• thin PG layer
• plasma membrane

Bacillus anthracis
E. coli O157H7
6
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

7
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

8
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

9
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

10
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

11
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

12
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

13
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

14
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

15
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote

16
The First Cells

• Life originated on Earth between 3.5 and 4
  billion years ago
• No oxygen was available (ANAEROBIC)
• First cells resemble cyanobacteria, a type of
  prokaryote