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cellbio exam 2 3
metabolism/photosynthesis
| Term | Definition |
|---|---|
| metabolism | all biochem reactions in cell |
| goal of life/metabolism | grow cell and reproduce |
| anabolism | resources used to build |
| catabolism | break stuff down and release energy |
| precursor metabolites | amino acids released when stuff is catabolized |
| ATP | energy stored in chemical bonds |
| ADP | low-energy form of ATP, can be reenergized |
| oxidation | molecule loses an electron |
| reduction | molecule gains an electron |
| NAD+ | hydrogen taxi |
| photosynthesis | 6CO2 + 6H2O + light energy = C6H12O6 + 6O2 |
| roots | how plants get water/nutrients |
| leaves | where photosynth happens |
| upper epidermis | outside layer of leaf, wax waterproofing |
| lower epidermis | little holes (stomata) for gas exchange |
| mesophyll | middle leaf |
| palisade mesophyll | where photosynth happens |
| spongy mesophyll | lets gas flow thru |
| chloroplasts | where thylakoids catch light |
| granum | stack of thylakoids |
| thylakoids | pancakes that catch light |
| stroma | liquid filling of chloroplasts, water+nutrients |
| light dependent step | sun energy turned into chemical energy |
| photosystem 1 | collects photons (energy), chlorophyllA + magnesium |
| chlorophyll A | main light catching pigment, extreme ends of light spectrum |
| chlorophyll B | middle of light spectrum |
| carotenoids | catches light chrorophyll can't catch well |
| photosystem 2 | splits water and takes the electrons, uses that energy to slap ADP+phosphates together to make ATP |