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43 Cards in this Set
- Front
- Back
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what are ways organisms obtain food
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sunlight, inorganic material, eating other organisms
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ex of kinetic, radiant, chemical energy
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kinetic-motion of molecule, radiant-sun, chemical-stored in food
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radiant and chemical energy used for
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to meet demands of growth and maintenance
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kinetic enrgy is used for
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determine rate of activity and metabolic energy
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chemical energy is stored in
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bonds of molecules
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autotrophs
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get energy from sunlight or inorganic chemical compunds convert to chemical energy in carbon bond
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not all ploants are autorroph
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yes
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heterotroph
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eat others or nonliving-detrius-parasites herbivores predators
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all animals are heterotroph
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yes
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holoparasites and hemiparasites
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no photosynthetic pigment, hemi have it but also get from host plant
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radiant and chemical energy captured by autotroph is converted to carbon carbon bond energy
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yep
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photosynthesis
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take co2 and synthesize carbon carbon bonds-carb or fat
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chemosnthesis
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use energy from inorganic compounds to take up co2 and produce carb-important to bacteria.
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earliest autortroph on earth were chemosynthetic
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yep
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chemosynthsis cycle
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first, obtain electrons, oxidize the inorganic substrate. then e is used to get ATP and NADPH. these are used for fixation of CO2
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fixation
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fixation of carbon from CO2 is used for snthesizing carb used for storage
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Calvin cycle (chemosyn and photosyn
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the biochemical pathwat used most commonly to fix CO2. enzymes help
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enzyme for calvin cycle
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important for nitrogen cycle, sulfur bacteira
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light reaction
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harvest light energy, split water to get electrons to genreate ATP and NADPH
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dark raetion
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fixation of CO2 using calvin cycle and synthesis of carbs(still happens in daytime) release O2 into atmosphere
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what does plants use to harvest light
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chlorophyll and accessory pigmentns
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chloropyss absorbs
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red and blue and reflect green
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key enzyme associates with Calvin cycle
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Rubisco catalyze the uptake of CO2 and synthesis of PGA
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net reaction for photosynthesis
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6CO2 + 6H2O=C6H12O6+6O2
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cartenoids abosoir
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blue and green and reflect red yellow and orange
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calvin cylce occurs both in
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chemosynthesis and photosynthesis
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light compensation point
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where CO2 uptake is same as CO2 oss by respirtaion
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light saturation is reached,,,
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when photosynthesis no longer increase as light lincrease
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leaves grown at high light levels are
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thicker and more chloroplasts than leaves in low light
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as light leve increase
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the photosynthetic rate increase
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oxygenase reaction
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photorespiration..net loss of energy
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as temp increase the rate of o2 uptake
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also increase...more photorespire
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more photorespiration is more
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electron transport
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c4 lowers photorespiration by
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pump more CO2 and increase spatial separation of where co2 is taken up and calvin cycle happens
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in C4, CO2 is taken up bu
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PEPcase greater capacity than rubisco
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CAM se[arates CO2 uptake and calvin cycle
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temporarily at night stomates opend, close at day.
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in CAM the Calvin cycle occurs at
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day time thick tissues for storing
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facultative CAM
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swtich between C3
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how does heterotroph obtain energy
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eat others, convert to ATP thorough glycolysis-breaks down sugars and fats
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prokaryotes absord food throgh
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cell membrae
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bioremediation
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ability of bacteria to break down food wit enzyme
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marginal value theorem
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foragers leave at giving up time
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longer to travel is
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longer staying
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