Flashcards in Photosynthesis Deck (32)
The role of autotrophs and the two different kinds
Use inorganic Carbon as Carbon source, fix Carbon into organic compound (inorganic carbon CO2 to usable cellular form)
Photoautotrophs: use light energy to fix C (photosynthesis)
Chemoautotrophs: use redox energy (bacteria)
The role of heterotrophs and the two different kinds
Use organic carbon as carbon & energy source
Chemoheterotrophs: use organic as main nutrient (humans)
Photoheterotrophs: use light energy & organic carbon (prokaryotes)
Site of the Calvin Cycle?
How many membranes in the chloroplasts
Overall reaction of photosynthesis
6CO2+6H2O+light = C6H12O6 + O2
Is Carbon in CO2 oxidized or reduced?
Where do light reactions occur
Is the Calvin cycle light dependent
No, light independent
What is the point of light reactions
Convery light energy into chemical energy in the form of ATP & NADPH; used to power Calvin cycle
What converts light energy into chemical energy
Where are the photosystems located
What is photolysis
When the energy absorbed by pigments (chlorophyll) in Photosystem II is used to split water (H2O to O2)
What is the energy conversion in Photosystem II?
Light energy is converted to chemical energy in the form of an excited electron
What is the electron transport chain?
Series of redox reactions that slowly release energy. Exists btw PII and PI
Is NADPH the oxidized or reduced form
Energy conversion in ETC?
Energy is released from redox reactions as the electron is passed down the chain, it is used to pump H+ into the thylakoid lumen (the inside)
Energy conversion in Photosystem I?
Excited electron is used to reduce NADP+
What is Chemiosmosis (photophosphorylation)
Formation of ATP using ATP synthase powered by H+ gradient created by the photosystems
What is ATP synthase
An enzyme that catalyzes (accelerates) the formation of ATP during chemiosmosis
Energy conversion in Chemiosmosis
Energy in H+ gradient powers ATP formation
What is NADPH?
An electron carrier between redox reactions (ie. from light reaction to calvin cycle)
Point of the Calvin cycle?
Convert CO2 to sugar (fix carbon)
How many times does the Calvin cycle turn to produce one molecule of G3P
What enzyme fixes Carbon
How many G3Ps in 1 Glucose
What is G3P
Glyceraldehydge 3 phosphate
Three phases of the Calvin cycle?
Carbon fixation -> Reduction ->Regeneration
What is the product of the Calvin cycle
How many CO2s need to enter the Calvin cycle to produce 1 G3P