oxygenic photosynthesis by cyanobacteria

Question 1

nutritional type of cyanobacteria

Answer 1

photolithautotrophs

Question 2

define oxygenic

Answer 2

O2 is produced as waste product

Question 3

what is e- donor and TEA and the products of each

Answer 3

water (inorganic), oxidized to porduce 02. TEA is NADP+ producing NADPH

Question 4

REACTION centre II has chlorophyll P680 meaning what

Answer 4

the absorption oeak is at 680nm

Question 5

how are e- donates, and how is 02 waste

Answer 5

O2.H20 redox couple has more -ive r.p. than P80. H20 can spontaneously donate an e- to oxidized P680 producing reduced P680. O2 is waste product

Question 6

how does P680 get a more -ive r.p.

Answer 6

light nrg excites the e- in the reduced P680

Question 7

what happens th the excited e- in RCII

Answer 7

e- then donates to an ETC. e- flow spontaneoulsy to P700 in RCI

Question 8

what is photophospohrylation

Answer 8

once exicited e- are donated to ETC creates a PMF that can be used to synthesize ATP using ATP synthase

Question 9

RCI is more -ive r.p. than RCII. Why

Answer 9

light nrg excites the e- in P700 and is donated to second ETC giving more -ive r.p.

Question 10

name the two possible routes for e- once it enters RCI

Answer 10

cyclic flow and non cyclic flow

Question 11

what is cyclic flow

Answer 11

return to RCI where e- can be excited again. contributes to the PMF and therefore to ATP synthesis

Question 12

what is non-cyclic flow

Answer 12

e- can be used to reduce NADP+ producing NADPH