Metabolism - IV Flashcards
phototrophy vs autotrophy
photo - light
~ uses to make ATP via ETC
(needs lots of membrane SA)
auto - dark
where does phototrophy and autotrophy take place in euks vs prokaryotes
euks
- chloroplast organelle
pro
- inclusion bodies
~ phototrophy = thylakoids or chromatophores
~autotrophy = carboxysomes
describe carboxysomes
autotrophy
~ contain enzyme RubisCo to reduce CO2 into glucose
photosynthetic bacteria can do both ____ and ____
phototrophy and autotrophy
photolithoautotrophy is ____ based
chlorophyll based
photoorganoheterotrophy is ____ based
rhodopsin based
color of an organisms is affected by its ______
major light absorbing pigments
describe light absorbing pigments
go from a very + deltaE to a - deltaE when exposed to light in their wavelength
- e acceptors to donors (excited e enter ETC and generate PMF)
photo phosphorylation
use energy from sun to make ATP from ADP
light-> pigments excited & donate e to ETC- > PMF -> ATP synthase = ATP
non cyclic photophosphorylation
produces ATP, NADPH, and sometimes O2
- e donor - H2O
- e acceptor - NADP+
O2 and H as waste
what’s different about nonoxygenic non cyclic photophosphorylation
e donor is H2S (hydrogen sullied) to produce H & sulfur not oxygen
cyclic phosphorylation is always ______ and chlorophyll is ……
the only product is what?
anoxygenic
chlorophyll = e donor & e acceptor
only product is ATP …. still need NADPH
how can microbes using cyclic phototrophy still make NADPH (3)
- Reverse Electron Transport
- using PMF - Hydrogenase Enzymes
- use H2 directly to make NADPH - Electron flow to generate redox potential
rhodopsin based phototrophy
pump H ions directly across a membrane (generating PMF) when stimulated by light
- NOT ETC INVOLVED
