Photosynthesis Flashcards
(21 cards)
what are the TWO PHASES OF PHOTOSYNTHESIS
- Light dependant reaction
- light independant reaction
where does photosynthesis take place?
in the chloroplast of eukaryotic organisms
what are the separated compartments of chloroplasts
- thylakoids
- stroma
what is the difference between THYLAKOIDS, and STROMA
- Thylakoids have the lumen on the inside
- STROMA is the fluid outside the thylakoids
draw a sketch of the chloroplast
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what is CHLOROPHYL
a pigment located in the thylakoid membrane
what is LIGHT absorbed by
Photosystem II
DRAW + EXPLAIN THE ENERGY CAPTURE PROCESS
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name the four stages in LIGHT DEPENDENT REACTIONS
Energy Capture, electron transport, NADPH formation, ATP Synthesis
what happens during: ENERGY CAPTURE
- Light is absorbed by P.S. 11,
- the energy from light breaks apart H20 (water)
- Hydrogen and Oxygen gas is made
- Electrons are released from the water
what happens in: ELECTRON TRANSPORT CHAIN
-electrons released by the water are passed to proteins in the thylakoid membrane
- Hydrogen gas is pumped into the lumen
- electrons are passed into P.S. 1 and now they have low energy
what happens in: NADPH formation
P.S. 1 raises the energy using chlorophyl, then elecrons bond with a molecule
- NADP+ Becomes NADPH
what happens in; ATP SYNTHESIS
- protons will flow through ATP synthase in the thylakoid membrane, ATP is then produced in the stroma
Which molecules from the light dependent reaction create glucose?
ATP, NADPH
whats the problem with NADPH, and ATP
they can carry large amounts of energy, but they are not stable enough to store chemical energy for long periods of time
What is energy stored in organic molecules as?
Glucose
what are the 3 phases of the calvin cycle?
-carbon fixation
- reduction
- reformation of RuBP
what ahppens during: CARBON FIXATION
rubisco combine with CO2 in the stroma, which produce PGA
what happens during: REDUCTION
ATP is used to turn the PGA molecules into BPG, this BPG combines with NADPH to create G3P
what happens during: REFORMATION
ATP reacts with the remaining G3P to create RuBP
- cycle continues
what is the major purpose of each stage of photosynthesis?
light dependent: to capture light energy to produce ATP and NADPH, which stores energy for the next stage of photosynthesis
light independent: to use ATP and NADPH to turn CO2 into glucose, this happens in 3 stages, Carbon fixation, reduction, and reformation of RuBP
