Microbes

Question 1

What are differences between archea and bacteria?

Answer 1

1- different cell walls : most archea do not have peptidoglycan

2- Unique cell membrane: archea lipids are ether bon (not ester bound) and branched

3- unique metabolism: archea don’t use glycolysis or krebs cycle

Question 2

What are the main archeal functions?

Answer 2

• Methanogens
• Ammonia oxidizers (catalyze reactions from NH4=> NO3)
• Denitrifiers ( responsible for some steps in denitrification that produce NO and N2O

Question 3

What are differences between Gram + and Gram -

Answer 3

Gram +:

• Purple
• No outer layer
• Big peptidoglycan
• ex: firmicutes, bacillus, listeria

Gram -:

• Pink
• Outer membrane
• Peptidoglycan
• Much more common
• Cell is less rigid

Question 4

What is the differences between photo and chemo trophes?

Answer 4

Photo= energy from liight 
Chemo= energy from breaking chemical bounds

Question 5

What is the difference between litho and organo trophs?

Answer 5

Litho= inorganic

Organo= organic source of carbon

Question 6

What are some impacts of viruses?

Answer 6

• many plant viral pahtogens are soil-brone
• Exert control on microbial population sized and turnover and thus influence rate of many mircobial processes

-