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50 Cards in this Set
- Front
- Back
what kind of reaction is photosynthesis? why?
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anabolic, because it combines simple molecules into more complex molecules.
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is photosynthesis endergonic or exergonic?why?
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endergonic, because it stores energy and does not release energy
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energy from the ___ is stored in the bonds of the sugar _______.
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sun / glucose
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What serves as the carbon source for photosynthesis?
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carbon dioxide (CO2)
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sunlight is absorbed as packets of energy called ______.
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photons
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Besides carbon dioxide (CO2), _______ is also used in photosynthesis to produce ___________ such as the sugar, _________.
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water (H2O)/ macrmolocules / glucose
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what organisms does photosynthesis occur in?
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autotrophs (plants)
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where does photosynthesis mainly occur in the plant?
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leaves
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what are the pores under the leaf of a plant are called?
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stoma
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what are the cells that contain chloropyll called?
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mesophyll
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what is the organelle in mesophyll cells that contain chlorophyll called?
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chloroplast
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what are two gases that exchange through the stomata of a leaf?
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oxygen (O2) and carbon dioxide (CO2)
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true or false?
water vapor can be lost from a leaf. |
true
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how many membrane(s) does a chloroplast have?
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two
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what is the outer membrane of a chloroplast contain?
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(like a call membrane)
is has a phosolipid bilayer and protien globulers |
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what is the jelly-like substance in a chloroplast?
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stroma
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what are the flat sacs in chloroplast ?
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thylakoid
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what are stacks of thylakoids called?
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granum
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grana make up which chloroplast membreane?
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inner
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why are plants green?
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because they contain the pigment chlorophyll which is green
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what is chlorophyll's center ion?
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magnesium (Mg)
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where are chlorophyll molecules located? what do they do?
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thylakoid membrane, harvest light energy
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true or false?
chlorophyll and other pigments absorb energy of light from 200nm to 1000 nm |
false.
chlorophyll and other pigments absorb energy of light from 400nm to 700nm |
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which pigments do chlorophyll absorb best?
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red and blue
(they reflect green which is the color you see) |
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during the fall what happens to the amount of chlorophyll in a plant?
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because of little sunlight the production of chloropyll is greatly reduced.
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what pigment include yellow, orange, and red?
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carotenoids
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why do leaves change color in the fall?
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because the plant stops producing the green pigment and then the other pigments are revealed
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what is a redox reaction?
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a reaction that involves the transfer of electrons between two chemical species
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what is the loss of electrons called?
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oxydation
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what is the gaining of electrons called?
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reduction
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what is the summary equationfor photosynthesis?
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6CO2+6H2O -> C2H12O6+6O2
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what is the primary source of energy for earth?
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sunlight
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plants store _____ in the chemical bonds of the_____, ________.
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energy / sugar, glucose
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when is chemical energy released from sugar?
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during cellular respiration
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what does ATP stand for?
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adenosine triphosphate
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what are the three parts of ATP?
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adenine, ribose, and 3 phosphate groups
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true or false?
the bond attaching the last phosphate group to ATP is a low energy bond. |
false
it is a high energy bond |
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what happens if the last phosphate group is broken from ATP
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it releases energy for the cell to use
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name three things that happen when the last phosphate group is broken from ATP.
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energy is released, ADP is formed, and free phosphate group
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what is the process of turning ATP to ADP and a free phosphate group is called?
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phosphorylation
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what is the first part of photosynthesis?
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light reaction
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light reactions use energy from the ____to produce ____ and the energy carrier ______.
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sun / ATP / NADPH
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what is the second part of photosynthesis?
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the calvin cyle (or the dark reaction)
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true or false?
the calvin cylce does not require energy from the sun. |
true
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what is the calvin cyle also called?
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carbon fixation or the C3 pathway
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where do the light reactions take place?
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thylakoid membrane
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what are the two possible routes energized electrons can take during the light reaction?
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cyclic electric flow
and noncyclic electric flow |
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true or false?
the cyclic electron flow only uses PS 1 in the thylakoid membranes and has chlrophyll A molecules at the PS's reaction center that absorbs P700 wavelength of light. |
true
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what is the only energy generated in the cyclic eletron flow?
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ATP
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which photosystem does the noncyclic flow use?
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PS 1 and 2
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