Bioenergetics Flashcards
What is photosynthesis
energy derived from light
what is an autotroph
“self-nourishing”
- can create carbon by themselves using CO2 as a carbon source
eg) Grass
what is a heterotroph
Need a source of organic matter to make carbons (opposite of autotroph)
what is a phototroph
They can use light as their energy source
- anything that does photosynthesis
what are the 2 main reactions in photosynthesis
Light reactions
- the light driven production of ATP
Carbon fixation
- The conversion of CO2 to carbohydrates
where foes photosynthesis occur in plants
chloroplast
what is the range of the visible light spectrum
380-760 nanometers
light is composed of small particles called _____
photons
plants absorb light mainly in the regions of ___ and ___ visible light
blue
red
what is a photosystem
A light harvesting unit in a chloroplast
what is the function of a photosystem
absorption of light energy
- H2O splitting and release of O2
- extracition of electrons
- transfer electrons into the electron transport chain
TF there are 2 Photosystems
T, PS2 and PS1
which comes first PS1 or PS2
PS2 goes first then electrons move to PS1
what is the final electron acceptor in the electron transport chain
NADP+ (which then turn into NADPH after it accepts the H)
What is chemiosmosis
the production of ATP using H+ to phosphoralize ADP into ATP
