phototrophs Flashcards
What is required for photosynthesis?
Light-sensitive pigments
are they lots of pigments?
Yes, each with a different absorption spectrum
ex of pigment
- chlorophyll a
- Bacteriochlorophyll a
the cyclopentanone ring?
c sa qui rentre ds la membrane
Reaction center
structures that participate directly in the reactions that lead to energy conservation
Chlorophyll or bacteriochlorophyll
molecules are arranged
in
photocomplexes containing other
photosensitive pigments and proteins
which pigment participate directly in the photosynthesis reaction ?
the pigments in the reaction
center
the pigments that are aroung act as
antennae to harvest light and funnel the energy to the RC
Carotenoids what are they ?
hydrophobic, light –sensitive
pigments
carotenoids are firmly embedded in the ?
photosynthetic membrane
the primary role of carotenoids is?
to protect the system against bright light
why need to protect from the bright light?
may lead to production of toxic forms of
oxygen.
Phycobilins form complexes with proteins that
are the main
light-harvesting systems in
Cyanobacteria:
light-harvesting systems in
Cyanobacteria?
phycobilisomes.
phycobilisomes job?
They harvest
light of other wavelengths than chlorophyll
