Respiration + fermentation Flashcards
anabolism vs catabolism
ana = biosynthesis. cata = energy, precursors for biosynthesis, waste products.
phototrophs
use light as energy source. , use light + splitting water to get e-.
photoautotrophs
fix carbon from CO2
photohetertrophs
energy from light, C from orgnaic molecules. more efficient.
chemotrophs
use chemical compounds as energy source
chemoorganotrophs
use organic chemicals for energy
chemolithotrophs
use inorganic carbon for energy,
chemolithoautotrophs
use inorganic for energy, C source is CO2
mixotrophs
H2 oxidizing bacteria grow with CO2 or organotrophs. come chemolithotrophs lack enzymes for CO2 fixation.
respiration vs fermentation
2 diff:
formation of ATP : F= substrate-level phosphorylation. R = oxidative phosphorylation.
terminal e- acceptor: F: none. redox within substrate. R = O2 (aerobic), other inorganic molecule (anaerobic)
3 stages of organotrophic catabolism
- large molecules -> small molecules (little energy)
- oxidation + degradation (of monomer) to pyruvate by glycolytic and pentose phosphate pathways
- oxidation + degradation of pyruvate by TCA cycle (intermediates, NAD -> NADH. if cannot be regenerated go thru fermentation process)
three pathways of organotrophic catabolism
gycolytic and pentose phosphate pathways = oxidation; degradation.
TCA cycle.
anapleurotic:
- > intermediates + enzymes both catabolism and anabolism.
- > chemolithotrophs have pieces of pathways
glycolysis - found where? in what type of -obes?
all kingdoms of life. in aerobes + anaerobes
glycolysis - fast? e- transfer?
quick energy. no e- transfer. substrate-level phosphorylation
two problem w glycolysis
creation of ATP limited to 2/gluc = lots of consumption
proton/electron excess at pyruvate - must regenerate NAD+ via ETC or creation of terminal products (fermentation)
