Green sulfur bacteria

Cyanobacteria

Algae

Higher plants

Cyclic photophosphorylation

Non-cyclic photophosphorylation

Both (a) and (b)

Where only photosystem pigment-I is involved

Only I

II and III

I and III

Only II

PSII → PQ → Cytochrome b6f complex → PC → PSI → Ferredoxin → NADP+ reductase

PSI → PC → Cytochrome b6f complex → PQ → PSII → Ferredoxin → NADP+ reductase

PSII → Ferredoxin → Cytochrome b6f complex → PQ → PSI → PC → NADP+ reductase

PSI → PQ → Cytochrome b6f complex → PC → PSII → NADP+ reductase → Ferredoxin

Chlorophyll a is not the only pigment involved in light absorption.

Photosynthesis ceases completely at wavelengths above 680 nm.

Chlorophyll a becomes inactive at wavelengths above 680 nm.

Far-red light is not utilized in photosynthesis.

Channel that allows ${H^ + }$ diffusion

Has channel that allows electron diffusion

Channel that allows diffusion ${O_2}$ molecule diffusion

Channel that allows $C{o_2}$ molecule

OpuntiaO

Pineapple

Bryophyllum

All of these

Stroma

Stroma thylakoid

Granum thylakoid

Outer surface of stromal and granal thylakoid

One molecule of chlorophyll-a

Very few molecule of chlorophyll-a

Hundereds of pigment molecules bound to proteins

Chlorophyll-a + chlorophyll-c + protein + DNA

Inhibit he movement of electrons from PS-II to PS-I

Inhibit the movement of electrons from PS-I to PS-II

Inhibit the photolysis of water

Promote ATP formation

Rubisco

Plastocyanin

Ubiquinone

Cytochrome