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42 Cards in this Set

  • Front
  • Back
Which product of photosyntheis in alge does not contain O18
Oxygen gas

What products of light reactions in photosynthesis are used in the Calvin Cycle?
What is the primary function of the light reactions of photosynthesis
to product ATP and NADPH
Where does the Calvin cycle take place?
Stroma of the chloroplast
During photosynthesis visible light has enough energy to o what?
Excite electrons and split a water molecule into hydrogen and oxygen
In the thalakoid membranes, what is the main role of the antenna pigment molecules
To harvest protons and transfer light energy to the reaction center chlorophyll
The reaction center chlorophyll of photosystem 1 is known as P700 because
This pigment is best at absorbing light with a wavelenght of 700 nm
What are the events that occur in the light reactions of photosynthesis
Oxygen is produced
NADP is reduced to NADPH
ADP is phosphorylated to yeild ATP
Light is absorbed and funneled to reaction-center chlorphyll A
What are the events of a photosystem 2
Light energy excites electrons in a photosynthetic unit.
The excitation is passed to P680 chlorophyll in A psu.
The electron vacancies in P680 are filled with electrons from water.
THe splitting of water yeilds molecular oxygen as a by-product.
Photosystem 1 includes
harvesting of light energy by chhlorphyll.
recieving electron from plastocyanin.
P700 reaction center clorophyll.
Passing electros to ferredoxin
What are the products of noncyclic photophosphorylation/
What does the chemiosmotic process in chloroplasts involve?
Establishment of a proton gradient
In a plant cell where are the ATP synthase complexes located
Thylakoid membranes and inner mitochondrial membranes
In chloroplasts, chemiomosis translocates protons from where to where
The stroma to the thylakoid space.
Where is the elecron transport chain found in plant cells
Thyakoid membranes of chloroplasts
photosynthesis and respriation can best be described as
Photosynthesis stores energy and respiration releases it
What do mitochondria and chloroplasts have in common
chemosis and ATP synthase
Synthesis of ATP by the chemiosmotic mechanism happens in
Both photosynthesis and respiration
Reduction of oxygen which forms water happens in
Both Photosynthesis and respiration
Reduction of NADP+ happens in
The splitting of Carbon dioxide to form oxygen gas and carbon compounds happens in
neither photosynthesis nor respiration
The gereration of proton gradients across the membrane happens in
Both photosynthesis and respiration
What describes the relatoinship between light reactions and the Calvin cycle
Light reaction provide ATP and NADPH to the Calvin cycle, the cycle returns ADP, P sub i and NADP+ to light reactions
Where do enzymatic reactions of the Calvin Cycle take place
The stroma of the chlorplast
What is the primary function o fthe Calvin Cycle?
To synthesize simple sugars from Carbon Dioxide
What produces molecular oxygen?
Light reactions Alone
What requires ATP?
The calvin cycle alone
What produces NADH
Neither the light reactions nor the Calvin cycle
What produces NADPH
Light reactions alone
What produces three carbon sugars
The calvin cycle alone
What is inactive in the dark?
Light reactions alone
What requires CO2?
The Calvin Cycle Alone
What requires glucose?
Neither Light Reactions nor the Calvin cycle
What Participates in the Calvin Cycle and has an affinity for both o2 and CO2
The enzyme ribulose bisphosphate carboxylase
If c14 is incorporated first into oxaloacetate in photosynthsis, the plant can be characterized as as a what
C4 plant
Why are C4 plants able to photosynthesize with no apparent photorespiration?
They use PEP carboxylase to to initially fix CO2
Cam plants keep stomata closed in daytime, thus reducing the loss of water. They do this because:
they fix CO2 innto organic acids during the night
Carbon fixation takes place in the ___________ cells and then is transferred as malic or aspartic acid to ________ cells, where carbon dioxide is released for entry inot the calvin cycle
mesophyll; bundle sheath
In plants when the stomata are closed they are called
CAM plants
Carbon fixation invlolves the addition of carbon dioxide to
C4 plants differ from C3 and CAM plants in that C4
Transfer fixed carbon dioxide to cells in which Calvin cycle occurs. And Use malic acid to transfer carbon dioxide to the Calvin cycle.
And they use PEP carboxylase to fix Carbon dioxide
Which of th efollowing sequesnces correctly represents the flow of electon during photosynthesis
H2O reacts to NADPH reacts to the Calvin Cycle