phototrophs

Question 1

gram

Answer 1

-ive

Question 2

types

Answer 2

photolithoautrophs and photoorganoheterotrophs

Question 3

egs of some

Answer 3

cyanobacteria, purple or green sulfur bacteria and purple or green non-sulfur bacteria

Question 4

ETC

Answer 4

all photosynthetic bacteria use light to excite e- (excited means e- have more -ive reduction potential)

Question 5

what happens to e- after they are excited

Answer 5

can spontaneously pass through an ETC. each component of ETC has more +ive reduction potential. nrg is released and creates a PMF. ATP is synthesized by ATP synthase. photophosphorylation

Question 6

the ETC have various pigments that do what. give an eg

Answer 6

absorb light at diff wavelengths. chlorophylls are found in cyanobacteria

Question 7

bacteriochlorophylls found in purple and green bacteria do hwat

Answer 7

similar structure as chlorophyll but absorb diff wavelengths of lights. also give organism its colour