Anoxygenic photosynthesis: purple bacteria

Question 1

what is anoxygenic

Answer 1

no O2 is produced as waste product

Question 2

purple photosynthetic bacteria includes (also name nutritional type)

Answer 2

purple sulfur-photolithoautotrophs

purple non-sulfur-photoorganoheterotrophs

Question 3

ATP synthesis

Answer 3

have only one RC(P870) and one ETC, only cyclic e- flow. used to create a PMF which can used to synthesize ATP by photophosphorylation

Question 4

NAD(P)H synthesis, what is e- donor and acceptor

Answer 4

second ETC used to synthesize NAD(P)H. e- donor for ETC is sulfur compound (lithotrophs) which is inorganic or succinate (organohetrotrophs) which is organic. NAD(P)+ is e- acceptor

Question 5

how do they do reverse e- transport for NAD(P)H synthesis

Answer 5

use the PMF produced by light nrg and cyclic e- flow as source of nrg