BIOC17H3 Lecture Notes - Lecture 6: Chromophore, Stromatolite, Rhodopsin
5 Jul 2018
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LECTURE #6
PHOTOTROPHIC ORGANISMS
- Their source of energy is light
and their source of carbon is
CO2
- These phototrophic organisms
include: plants, algae,
microscopic algae, and
cyanobacteria
-phototrophic bacteria came
later from chemoautotrophs
odon’t find
photoautotrophic
metabolisms in
archaea other than
Halobacterium
owould have been
hard in the early
earth atmosphere
b/c the surface of
earth at the time
had lots of UV
radiation, attacks
from meteorites,
volcanoes etc.
ophotosynthetic: use
energy of light to
reduce CO2 to produce
organic compounds for
their metabolism
int eh case of
Halobacterium
they are
phototrophic,
but not
photosynthetic
use enenergy
of light to
produce ATP,
but won’t use
it to create
organic compounds
find more resources at oneclass.com
find more resources at oneclass.com
-eukaryotes and bacteria can be photoautotrophs
-only photoheterotrophs are phototrophic bacteria and some archaea
PHOTOSYNTEHTIC REACITON
-photosynthetic organisms
are phototrophic
organisms use the
chemical energy obtained
form light to synthetize
organic ocmpounds
-use the energy to reduce
carbon into various
varbohydrates
-there are some
photoautotrophic
organisms that will do
photoysntehsis, but won’t
produce oxygen
otakes place in
different forms of
bacteria
-light reactions: take energy fo light capture by chlorphyll and pigments oxidize water
and take NADP and ADP + Pi to create NADPH and ATP
othis readucing power and energy is utilized in the dark reacitons to take CO2 to
convert it into G3P
which will then feed
into the central
pathways (to generate
carbohydrates etc.)
othus: have proteins in
the pigments that will
capture the energy of
lgith to generate and
ETC that will generate a
PMF that will then
produce ATP from ADP
and NADPH form the
reduction of NADP
othis energy and
reducing power will
then fix the CO2 from
the atmosphere into
G3P and feed it into the general pathways
find more resources at oneclass.com
find more resources at oneclass.com
-where dot tehse reactions take
place?
oChloroplast
oChrloplaasts has 2
emmbranes intenral
membrane structure w/
the granum that contain
the thylakoid sacs; the
fluid surrounding the
grana are the stroma
oThe thylakoids are where
the light reactions will
occur
Light is capture
here and light is
utilized to oxidize
water and obtain
reducing power
the ATP and
NADPH will then go into the stroma to fix the CO2
oThe dark reactions take place in the stroma
- Chloroplasts are found in microscopic algae, algae, and plants
CHLOROPLASTS
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Their source of energy is light and their source of carbon is. These phototrophic organisms include: plants, algae, microscopic algae, and cyanobacteria phototrophic bacteria came later from chemoautotrophs: don"t find photoautotrophic metabolisms in archaea other than. Use enenergy of light to produce atp, but won"t use it to create organic compounds eukaryotes and bacteria can be photoautotrophs only photoheterotrophs are phototrophic bacteria and some archaea. Pmf that will then produce atp from adp and nadph form the reduction of nadp: this energy and reducing power will then fix the co2 from the atmosphere into. G3p and feed it into the general pathways. Light is capture here and light is utilized to oxidize water and obtain reducing power the atp and. Nadph will then go into the stroma to fix the co2: the dark reactions take place in the stroma. Chloroplasts are found in microscopic algae, algae, and plants.
