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AP Biology Midterm Review Flashcards

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8447214041Dehydrationconnecting monomers together by the removal of water0
8447214042Hydrolysisdisassembling polymers by the addition of water1
8447214043Disaccharidesglucose + glucose = maltose / glucose + fructose = sucrose / glucose + galactose = lactose2
8447214044PolysaccharidesPlants: starch (energy) and cellulose (structure) Animals: glycogen (energy) and chitin (structure)3
8447214045*Lipidshydrophobic (very non-polar), consist of long hydrocarbon chains4
8447214046Fatsconsist of glycerol and 3 fatty acids, store long term energy, saturated = no double bond in hydrocarbon tails (no kink), unsaturated = double bond (kink)5
8447214047Phospholipidsconsist of phosphate head, glycerol, and 2 fatty acid tails, tail is hydrophobic, head is hydrophillic6
8447214048Protein structure and organizationcomposed of an amino group, a carboxyl group, hydrogen, and an R group, joined by peptide bonds and folded numerous times; 1) Primary (linear sequence) 2) Secondary (helix or pleat) 3) Tertiary 4) Quaternary (globular)7
8447214049Protein functions (8)1) enzymes 2) antibodies 3) storage proteins 4) transport proteins 5) hormones 6) receptor proteins 7) motor proteins 8) structural proteins8
8447214050*Nucleic AcidsDNA (A+T, G+C) carries genetic info, RNA (A+U, G+C) manufactures proteins9
8447214051Nuclear Envelopedouble membrane enclosing the nucleus (where genetic info is stored) perforated with pores, continuous with ER10
8447214052Chromatinuncondensed DNA that forms chromosomes during cell division11
8447214053Nucleolusnonmembranous structure involved in production of ribosomes, a nucleus has one or more of these12
8447214054Rough ERcovered in ribosomes, secretes and transports proteins produced by ribosomes13
8447214055Smooth ERmetabollic processes (synthesis of lipids, metabolism of carbs, detoxification of drugs and poisons)14
8447214056Golgistores, transports, and secretes cell products15
8447214057Cytoskeletonsupports cell, maintains its shape, aids in movement of cell products16
8447214058Centrosomes (2 centrioles)only in animal cells, microtubules used for cell division17
8447214059Lysosomesonly in animal cells, digestive organelles18
8447214060Flagellaonly in animal cells, cluster of microtubules for motility19
8447214061Extracellular Matrixonly in animal cells, made of proteins that provide support for cells and relay information for communication between the environment and the cell20
8447214062Central Vacuoleonly in plant cells, stores water and sugar, breaks down waste, and used as a mechanism for plant growth (when it swells)21
8447214063Prokaryotic vs. Eukaryoticnucleoid / nucleus; only ribosomes / complex membrane-bound organelles; both have same genetic coding, sugars, and amino acids22
8447214064Phospholipid Bilayertails of phospholipids are loosely packed and are in constant motion; membrane contains integral and peripheral proteins, cholestrol, and glycopreotins and glycolipids; cholesterol makes the membrane less permeable to water and other substances; non-polar and small polar molecules can pass through unadied23
8447214065Passive trasportmovement of molecules without requirement of energy: 1) diffusion 2) osmosis (across a membrane) 3) facilitated diffusion (helped by transport proteins)24
8447214066Active transportmovement of molecules that requires energy: 1) sodium-potassium pumps 2) exocytosis 3) endocytosis (phagocytosis, pinocytosis)25
8447214067Membrane Potentialvoltage across a membrane due to difference in positive and negative ions, electrons move from high to low concentration (ex. sodium-potassium pumps in neurons)26
8447214068Electrochemical Gradientdiffusion gradient resulting in combination of membrane potential and concentration gradient27
8447214069Hypertonicsolution with higher concentration of solutes, animal/plant cell in this solution would become shiveled/plasmolyzed28
8447214070Hypotonicsolution with lower concentration of solutes, animal/plant cell in this solution would lyse/become turgid29
8447214071Isotonicequal levels of solute concentration, plant cell in this solution would become flaccid30
8447214072When ΔG is negative......the reaction is exergonic (loss of free energy).31
8447214073When ΔG is positive......the reaction is endergonic (gain of free energy).32
8447214074*Enzymesproteins that are biological catalysts, lower the activation energy required to start a chemical reaction (reactants at unstable transition state) can be used over and over33
8447214075Substratethe substance that an enzyme acts upon34
8447214076Active Siteregion of enzyme that binds to the substrate35
8447214077Induced fitchange in the shape of an enzyme's active site induced by the substrate, helps to break down the substrate36
8447214078The higher the substrate concentration......the faster the reaction until the enzyme becomes saturated.37
8447214079Denaturationthe unraveling of an enzyme due to high temperatures or incompatible pH38
8447214080Cofactorsnonprotein molecules that are required for proper enzyme function, cofactors made of organic molecules are called coenzymes39
8447214081Enzyme inhibition may be irreversible if......the inhibitor attaches by covalent bonds (poisons, toxins)40
8447214082Competitive Inhibitorsresemble a substrate and block enzymes' active sites, can be overcome with higher concentration of substrate41
8447214083Noncompetitive Inhibitorsbind to a portion of the enzyme and change the shape of the active site so that it cannot match with substrates, used for regulating metabolic reactions42
8447214084Feedback Inhibitionthe product of a metabolic pathway switches off the enzyme that created it earlier in the process43
8447214085Oxidationloss of electrons (OIL)44
8447214086Reductiongain of electrons (RIG)45
8447214087Oxidative PhosphorylationATP synthesis powered by redox reactions that transfer electrons to oxygen46
8447214088Electron AcceptorsCellular respiration: NAD+ and FAD (to NADH and FADH2) Photosynthesis: NADP+ (to NADPH)47
8447214089GlycolysisInput: glucose, 2 ATP Output: 2 pyruvic acid, 4 ATP (net 2), 2 NADH48
8447214090Conversion Reaction before Kreb'sInput: 2 pyruvate Output: 2 acetyl (w/ CoA), 2 NADH, 2 CO249
8447214091Krebs CycleInput: 2 acetyl ➝ citric acid Output: 2 ATP, 6 NADH, 2 FADH2, 4 CO2 (after 2 turns of the cycle)50
8447214092Electron Transport ChainInput: NADH, FADH2, O2 (to accept e-) Output: 34-38 ATP, H2O51
8447214093Alcohol FermentationInput: glucose, 2 ATP, 2 NADH Output: 2 NAD+, 2 ethanol, 2 CO2, 4 ATP (net 2)52
8447214094Lactic Acid FermentationInput: glucose, 2 ATP, 2 NADH Output: 2 NAD+, 2 lactate, 4 ATP (net 2)53
8447214095Photosynthetic Equation54
8447214096Chloroplast structureExciting chlorophyll: chlorophyll in thylakoids absorb light, which excites electrons to produce potential energy55
8447214097Light ReactionsInput: H2O (2 e-), light energy, NADP+ Output: O2, ATP, NADPH56
8447214098Calvin CycleInput: 6 CO2 (fixed to RuBP by Rubisco), ATP, NADPH Output: 2 G3P = 1 glucose57
8447214108Prokaryotic cell divisionbinary fission: splits in 2, exact copies, quick and efficient with few mutations, but reduces amount of genetic variation58
8447214109Somatic cell vs. Gameteany body cell except gametes / reproductive cells (sperm, egg)59
8447214110Interphase(90% of cell's life) G1: 1st growth, normal metabolic activity (goes into G0 phase if it is not ready for next phase); S: synthesis, DNA replication; G2: 2nd growth, prepares for mitosis60
8447214111Mitosis1) Prophase: chromatin condenses into chromosomes, nucleus disappears 2) Metaphase: chromosomes line up at equator, kinetechore microtubules attach 3) Anaphase: sister chromatids move to opposite poles of the cell 4) Telophase and Cytokinesis: daughter cells separate, nucleus reforms, chromosomes decondense61
8447214112Cyclin-dependent Kinases (Cdks)a regulatory protein that depends upon the presence of cyclin to complete its function, MPF is a Cdk that triggers a cell's passage into the M phase62

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