study guide review chap 10 Flashcards
source of oxygen in photosynthesis?
water
what do light reactions produce and where do they occur?
in the thylakoids, they produce oxygen and NADPH
which photosystem does cyclic electron flow use?
only photosystem one (PS I)
what do light reactions split and produce?
split h2o and produce o2
what is oxidized and what is reduced in photosynthesis?
water is oxidized and carbon dioxide is reduced in photosynthesis
what is photorespiration?
photorespiration is the closing of stomata that reduces access to carbon dioxide and causes oxygen to build up; not able to make sugar
C3 plants?
initial fixation of carbon dioxide, via rubisco, forms a 3 carbon compound
C4 plants?
avoid photorespiration through a spatial solution to the prob
CAM plants?
avoid photorespiration through a temporal solution, opening during night, closing during day
what light can plants use?
violet-blue or red, not green or yellow
what directly participates in electron excitation in photosynthesis?
only chlorophyll a
photosynthesis and thermodynamic terms
photosynthesis is nonspontaneous, is endergonic, anabolic, positive delta G
For calvin cycle, what is needed?
for calvin cycle you need 9 atp and 6 nadph: 3 atp for every 2 nadph
Important thing to know about RuBP
RuBP is recycled, regenerated so the cycle can continue