Photosynthesis Flashcards
(27 cards)
Which molecule is in the reaction center of photosystem 680
Chlorophyll A
What does CO2 combine with during photosynthesis (Calvin cycle)
RuBP
What is photophosphorylation
synthesis of ATP using light energy
What is the product of the reduction phase of the Calvin Cycle
G3P
the antenna complex is composed of___ and ___
chlorophyll and accessory pigments
PS2 is also called P680 because
it best absorbs light with a wavelength of 680nm
Main parts of photosynthesis
Light reaction (PS1 and PS2), dark Reaction (Calvin cycle)
main difference between chlorophyll a and b: stucutre
Chlorophyll A: CH3
Chlorophyll B: Carboxyl group
light energy absorbed by P700 (PS1) energizes electrons to___
form NADPH
2 parts of chlorophyll
Phytol tail (Hydrophobic)
Porphyrin Ring (Hydrophilic)
In PS2, photons excite electrons that came from____
chlorphyll
In PS2, the electrons from chlorophyll are captured by a _____
primary electron acceptor
what does enzyme Z split water into?
electrons, O2, and H+
where do the remains of water go?
O2: Waste
H+: increase concentration in the lumen to eventually make ATP
electrons: replace the electrons lost in chlorophyll P680
as electrons move from one acceptor to the next, they power _____
H+ pumps
what do H+ pumps do? (SPECIFIC)
moves H+ ions against the concentration gradient from the stroma to the lumen.
how do H+ ions in the lumen make ATP?
goes through ATP synthase and makes ATP through photophosphorylation
why is photophosphorylation not the same as oxidative phosphorylation?
electrons are being removed from oxygen instead of added into oxygen. The initial energy came fromlight instead of glucose
where does the dark reaction (Calvin cycle) occur
stroma
what is a stack of thylakoids called
grana
what is the objective of photosynthesis
to convert solar energy into chemical energy
what are the three parts of the calvin cycle
- carbon fixation
- reduction
- RuBP Regeneration
the Calvin cycle makes what product (as seen from glycolysis)
G3P
G3P produced in the Calvin cycle can do one of two things. these are:
- make glucose
- continue calvin cycle to make RuBP
