Anoxygenic phototrophic bacteria

Question 1

Describe characteristics of Anoxygenic phototrophic bacteria

Answer 1

Simple photosynthetic apparatus-1 Photosystem
Cannot oxidise water
Do not produce O2
May use Hydrogen Sulphide or Hydrogen as electron acceptor

Question 2

Give an examples of Anoxygenic phototrophic bacteria

Answer 2

Chromatium okenii (Purple sulphur bacteria)

Question 3

Chromatium okenii electron donors

Answer 3

H2, HS-, S

Question 4

Chromatium okenii CO2 fixation

Answer 4

Calvin cycle

Question 5

Describe the complexity of Oxygenic Photosynthesis in comparison with anoxygenic photosynthesis

Answer 5

More complex system then anoxygenic photosynthesis-2 photosystems-capture more energy than anoxygenic photosynthetic bacteria.

Question 6

What is oxidised and what to in oxygenic photosynthesis?

Answer 6

H20 oxidised to O2

Question 7

What’s the main pigment found in organisms which apply oxygenic photosynthesis

Answer 7

Chlorophyll (foud in eukaryotes)

Question 8

Give examples of organisms which use oxygenic photosynthesis

Answer 8

Cyanobacteria
Higher plants
Algae

Question 9

What wavelenght do Chromatium okenii use in comparison with oxygenic photosynthetic organisms

Answer 9

Longer wavelenghts