Oxygenic photosynthesis

Question 1

who can do oxygenic photosynthesis?

Answer 1

Algae,cyanobacteria

Question 2

they use

Answer 2

lighe energy

Question 3

they energy light for the purpose of ?

Answer 3

oxidizing H20

Question 4

whats the pathway of the é?

Answer 4

é: photosystem 11 –photosystem 1—-NADPH

Question 5

oxidizing of H20 liberates?

Answer 5

Oxygen

Question 6

is it cyclic or non cyclic?

Answer 6

it’s non cyclic because é are used to produce PMF and NADPH

Question 7

How do we do ATP

Answer 7

pmg in both cyclic and non cyclic

Question 8

When the cell requires less NADPH,oxygenic phototrophs can ?

Answer 8

perform cyclic photophosphorylation

Question 9

which means it is when6

Answer 9

reducing power is sufficient

Question 10

therefore there is no need?

Answer 10

electron source

Question 11

electron are going to return where?

Answer 11

photocomplex 11

Question 12

in cyanobacteria where occurs oxygenic photosynthesis?

Answer 12

in cytoplasm

Question 13

in eukaryotes where does accurs photosnthesis?

Answer 13

chloroplast,stroma

Question 14

Who is the electron donor?

Answer 14

H20

Question 15

sometimes some cyanobacteria in presence of H2S can do?

Answer 15

anoxygenic photosynthesis

Question 16

why does it happens in presence of H2S?

Answer 16

because it inhibits PSII, H2S gives his electrons to the chain so no need of PSII

Question 17

who is the electron donor in anoxygenic photo?

Answer 17

it’s H2S which is oxidized

Question 18

when that happen is it cylic photophospho or non clycli6

Answer 18

it his cyclic photophosphorylatino

Question 19

why is it cycle photophosrylation?

Answer 19

because also the production of NADPH is inhibited and electron come back

Question 20

this cyclic photophosphorylation leads to ?

Answer 20

creation of pmf that drives ATP synthase

Question 21

is the NADPH always inhibited?

Answer 21

not sometimes can produce still NADPH if it his only partially inhibited