Microbiology Chapter 8

Type I/II Photophosphorylation

• Protonic gradient produces ATP

• Cytochrome b6f complex --> Plastocyanin

• PSI --> ferredoxin

• PSII --> Phaeophytin --> platoquinone Qb

• FNR makes NADPH

What molecule is present in all rxn centers?

What type of structures may include chlorophylls, pheophytin, and/or quinones?

What structure(s) is/are efficient at absorbing light for photosynthesis?

• Cell membrane

• Reaction Center

• Pigment/Antenna Complex

• Quinones

What type of energy is involved in the transfer of electrons within the whole structure of a reaction center?

• Resonance energy

• Vibrational energy

• Potential energy

• Brownian movement

Match the discrete structure to their pigment complexes

• Chlorosomes

• Chlorosomes*

• Phycobilins

• Green-sulfur bacteria and Acidobacteria

• chlorophyll*

• Phycobilisomes*

• Phycobilins*

• Cyanobacteria

Cyclic photophosphorylation generates energy in the light with material input

• True

• False

Why do autotrophs need a terminal e- acceptor?

• to fix carbon

• to obtain NADPH or reduced ferredoxin

• to generate O2 for humans

• to generate CO2 for humans

electron donors and ___ photophosphorylation are needed for __ trophic growth.

_____ growth does not need an electron donor.