Photosynthesis/ Cell Respiration

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photosynthesis

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-the process in which autotrophs convert light energy to chemical energy
-6 carbon dioxide molecules plus 6 water molecules in the presence of light yield glucose and 6 oxygen molecules
-occurs primarily in mesophyll cells in leaves which contain the chlorplasts, small openings in leaves called stoma or stomata let the CO2 in and the O2 out

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autotroph

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-producer, makes own food through photosynthesis (ex: plant, algea, some bacteria)

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heterotroph

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-a non producer, (fungi, animals, humans)

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jan van helmont

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-discovered that water accounts for increased mass of plant (weighing soil)

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joseph preistly

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-discovered that oxygen is given off by plants when preforming photosynthesis (candles and mint leaves)

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jan ingenhouz

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-experiment with underwater plants, give off o2 bubbles only when light is present

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parts of ATP

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-adenine + ribose + 3 phosphates

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parts of ADP

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-adenine + ribose + 2 phophates

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conversion of ADP to ATP

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-subtract one phosphate

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carrier molecules

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-transport electrons from one place to another

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chlorophyll and light absorbtion

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-chemical pigment inside thylakoid that absorb light

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steps of photosynthesis
PHOTOSYSTEM 2

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PHOTOSYSTEM 1- happens in thylakoids of the chloroplasts, converts light energy to chemical energy
1-light hits thylakoid, H2O divides, O2 leaves
2-electrons are transported through membranes of the thylakoids, getting excited
3-electrons and H+ by NADPH
4-ATP synthase enzyme makes ATP
5-ATP & NADPH go to stroma for calvin cycle
6-diffusion of H+ back across the membrane through ATP synthase (enzyme in membrane) which revolves like a turbine to the ADP into ATP

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steps of photosynthesis
PHOTOSYSTEM 1

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CALVIN CYCLE- in stroma
-light independent
-G3P is product

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cellular respiration

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-gylcolysis, Kreb's citric acid cycle, oxiidative phosphorlation
-products
1: pyruvate, nadh, 2 atp
2: CO2, nadh, fadh2, 2 atp
3: fad, nad, h2o, 34, atp

Front 15

glycolysis

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reactants-
glucose, oxygen
products- 2 atp, nadh, pyruvate

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krebs cycle

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2nd step in cellular respiration.

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carrier molecules in cellular respiration

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NADH- NAd
FADH2- FAD

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who?

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both plants and animals carry out cell respiration