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42 Cards in this Set
- Front
- Back
Which product of photosyntheis in alge does not contain O18
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Oxygen gas
O2 |
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What products of light reactions in photosynthesis are used in the Calvin Cycle?
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ATP and NADPH
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What is the primary function of the light reactions of photosynthesis
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to product ATP and NADPH
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Where does the Calvin cycle take place?
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Stroma of the chloroplast
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During photosynthesis visible light has enough energy to o what?
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Excite electrons and split a water molecule into hydrogen and oxygen
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In the thalakoid membranes, what is the main role of the antenna pigment molecules
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To harvest protons and transfer light energy to the reaction center chlorophyll
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The reaction center chlorophyll of photosystem 1 is known as P700 because
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This pigment is best at absorbing light with a wavelenght of 700 nm
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What are the events that occur in the light reactions of photosynthesis
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Oxygen is produced
NADP is reduced to NADPH ADP is phosphorylated to yeild ATP Light is absorbed and funneled to reaction-center chlorphyll A |
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What are the events of a photosystem 2
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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. |
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Photosystem 1 includes
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harvesting of light energy by chhlorphyll.
recieving electron from plastocyanin. P700 reaction center clorophyll. Passing electros to ferredoxin |
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What are the products of noncyclic photophosphorylation/
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ATP and NADPH
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What does the chemiosmotic process in chloroplasts involve?
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Establishment of a proton gradient
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In a plant cell where are the ATP synthase complexes located
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Thylakoid membranes and inner mitochondrial membranes
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In chloroplasts, chemiomosis translocates protons from where to where
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The stroma to the thylakoid space.
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Where is the elecron transport chain found in plant cells
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Thyakoid membranes of chloroplasts
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photosynthesis and respriation can best be described as
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Photosynthesis stores energy and respiration releases it
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What do mitochondria and chloroplasts have in common
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chemosis and ATP synthase
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Synthesis of ATP by the chemiosmotic mechanism happens in
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Both photosynthesis and respiration
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Reduction of oxygen which forms water happens in
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Both Photosynthesis and respiration
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Reduction of NADP+ happens in
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Photosynthesis
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The splitting of Carbon dioxide to form oxygen gas and carbon compounds happens in
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neither photosynthesis nor respiration
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The gereration of proton gradients across the membrane happens in
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Both photosynthesis and respiration
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What describes the relatoinship between light reactions and the Calvin cycle
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Light reaction provide ATP and NADPH to the Calvin cycle, the cycle returns ADP, P sub i and NADP+ to light reactions
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Where do enzymatic reactions of the Calvin Cycle take place
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The stroma of the chlorplast
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What is the primary function o fthe Calvin Cycle?
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To synthesize simple sugars from Carbon Dioxide
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What produces molecular oxygen?
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Light reactions Alone
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What requires ATP?
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The calvin cycle alone
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What produces NADH
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Neither the light reactions nor the Calvin cycle
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What produces NADPH
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Light reactions alone
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What produces three carbon sugars
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The calvin cycle alone
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What is inactive in the dark?
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Light reactions alone
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What requires CO2?
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The Calvin Cycle Alone
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What requires glucose?
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Neither Light Reactions nor the Calvin cycle
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What Participates in the Calvin Cycle and has an affinity for both o2 and CO2
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The enzyme ribulose bisphosphate carboxylase
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If c14 is incorporated first into oxaloacetate in photosynthsis, the plant can be characterized as as a what
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C4 plant
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Why are C4 plants able to photosynthesize with no apparent photorespiration?
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They use PEP carboxylase to to initially fix CO2
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Cam plants keep stomata closed in daytime, thus reducing the loss of water. They do this because:
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they fix CO2 innto organic acids during the night
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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
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mesophyll; bundle sheath
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In plants when the stomata are closed they are called
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CAM plants
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Carbon fixation invlolves the addition of carbon dioxide to
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RuBP
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C4 plants differ from C3 and CAM plants in that C4
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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 |
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Which of th efollowing sequesnces correctly represents the flow of electon during photosynthesis
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H2O reacts to NADPH reacts to the Calvin Cycle
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