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Biochemistry Flashcards

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5942760960What happens in condensation reaction?water molecule is removed from two monomers0
5942768008Examples of monomers (3)simple sugar, amino acid, fatty acid1
5942771463Examples of macromolecule (3)protein, DNA (or RNA), lipid2
5942799464Smallest living unit of an organismcell3
5942809646These structures lack a nucleus or organelles (bacteria)prokaryotes4
5942811968These structures have a nucleus and organelles (plants/animals)eukaryotes5
5942821828Where in the cell is protein made?RER6
5942839421Site in a cell for synthesis and metabolism of lipidsSER7
5942843198Cell structure that processes and packages macromoleculesGolgi apparatus8
5942846281Cell structure that contains digestive enzymes ("garbage men of the cell")lysosomes9
5942894829What form of protein, carbs, and fats are absorbable by intestine, respectively? (3)amino acids, monosaccharides, fatty acids/glycerol10
5942922124Functions of salivary glands (4)moisten food, clean teeth, dissolve molecules, digest11
5942928122Functions of stomach (2)digestion, secret acids, mucus, and digestive enzymes12
5942943540How many liters of gastric juice is produced by the stomach each day?2-3L13
5942951963Inactive precursor of active enzyme pepsin; chops protein into small fragments (activated by HCl or pepsin)pepsinogen14
5942960752HCl helps to activate _______________, break down _____________ ___________, destroy ______________, and denature ______________pepsinogen, connective tissue, pathogens, proteins15
5942968204How does the stomach protect itself from HCl and pepsin? (3)mucus coat, rapid replacement of cells, tight junctions between cells16
5942977246This is essential to the absorption of Vitamin B12; only indispensable function of the stomachintrinsic factor17
5942991794Gastrin is secreted by ________ in gastric gland into the ________G cells, blood18
5942997237Gastrin stimulates secretion of _____, and the motility of _________ ____________.HCl, large intestine19
5943004463Three stages of gastric secretioncephalic, gastric, intestinal20
5943008201First stimulation of cephalic phasesight/smell of food21
5943021969Gastric phase stimulated by what?food in stomach22
5943046495Intestinal phase: after entering small intenstines, chyme inhibit gastric secretion and mobility via... (2)enterogastric reflex, local hormones (secretin, CCK, GIP)23
5943053414When acid in the intestine stops G-cells from secreting gastrin thus slowing or stopping gastric motilityenterogastric reflex24
5943086626When no chyme is in the small intestine, the ______________ sphincter is closed. Bile flows into the ____________.hepatopancreatic, gallbladder25
5943090621Functions of gallbladder (2)store bile, absorb water26
5943100731Bile acids and phospholipids are reabsorbed in the ileum and returned to the liver via __________ ______________.enterohepatic circulation27
5943115020Secretes pancreatic juice into duodenum through the pancreatic ductpancreas28
5943124431Endocrine functions of pancreassecrete hormones into blood (long-term control of digestion)29
5943131516Pancreas secretes ______________ mL of pancreatic juice per day (empties into duodenum)1200-150030
5943140045Pancreatic juice is an __________ mixture containing... (3)alkaline; sodium bicarb, digestive enzymes and zymogens31
5943158807The _________ _______ stimulates pancreatic secretionvagus nerve32
5943164711Chyme with acid and fat stimulate the duodenal mucosa to secrete __________CCK33
5943167053CCK is responsible for relaxation of __________________ ____________, contraction of _______________, and secretion of _____________ ________hepatopancreatic sphincter, gallbladder, pancreatic juices34
5943179564During the intestinal phase, acidic chyme stimulates the duodenum to release _______secretin35
5943184487Nutrients pass into the _________ though small intestine wallsbloodstream36
5943186864These activate zymogens and complete digestion of carbs and proteinsbrush border enzymes37
5943199415Duodenum endocrine cells secret _____ and _______ in the bloodCCK, secretin38
5943208096Process in which molecules move from region of higher concentration to one of lower concentrationpassive diffusion39
5943216790Transport of solute molecules to higher concentrationsactive transport40
5943224879Transport of molecules across a cell's membrane via specific integral proteinsfacilitated diffusion41
5943240942Most digestible carb is ______, begins in the mouth by _________ _______. Full digestion of this carb occurs in the ______ ___________.starch, salivary amylase, small intestine42
5943252352What is glucose absorbed by?SGLT43
5943257400Proteins are digested by what 2 things?proteases and peptidases44
5943259634Protein digestion starts in the __________ and continues in the _________ ____________.stomach, small intestine45
5943268605Lipids are digested by enzymes called ___________, broken up by ______ ________ in bile.lipases, bile salts46
5943277416When lipase digests fats, the products are (2)FFAs and a glycerol47
5943287343Most common type of movement of the small intestine; followed by ___________segmentation, peristalsis48
5943294101Functions of large intestine (2)concentrate waste, bacterial digestion49
5943308309Neural control of defecation (3)filling rectum, relaxation of internal sphincter, voluntary relaxation of external sphincter50
59624696313 fates for foodsenergy to cells, synthesize structures, stored as fat51
5962474994The totality of an organism's chemical reactionsmetabolism52
5962480653A metabolic pathway begins with a specific __________ (starting molecule) and ends with a _____________.reactant, product53
5962487079Each step of metabolism is controlled by a(n) ____________.enzyme54
5962503417____________ reactions use ATP to combine smaller molecules, such as glucose, into larger compounds, such as glycogen, and release small amounts of heat.anabolic55
5962506737____________ reactions break down larger molecules into smaller compounds and release energy in the form of heat.catabolic56
5962511206Where is potential energy stored?bonds57
5962513696Type of energy: release of energy from bondschemical58
5962527133The study of energy transformationsthermodynamics59
5962531759In a closed system, such as that approximated by liquid in a thermos is what?isolated from surroundings60
5962534012In an open system, energy and matter can be transferred between ___________ and ____________.system and surroundings61
5962550724Energy transferred in the food chain: only 10% is actually transferred, the rest is lost as heat...what is this known as?10% rule62
5962554027A measure of disorder or randomnessentropy63
5962569592Only processes with a ___________ are spontaneousnegative (delta) G64
5962579255When delta G < 0spontaneous (exergonic), wont require energy65
5962582213When delta G > 0non spontaneous (endergonic), will require energy66
5962586308When delta G = 0equilibrium67
5962597079The energy available for doing workfree energy68
5962600680Chemical reactions that release free energyexergonic (spontaneous)69
5962603518Chemical reactions that require input of free energyendergonic (non-spontaneous)70
5962618049Three main kinds of work that a cell doesmechanical, transport, chemical71
5962622481To do work, cells manage energy resources by _________ __________.energy coupling72
5962647159How is a bond broken?activation energy73
5962650925________ can lower activation energycatalysts74
5962659214________ reduce the amount of activation energy required for a reaction to proceed.enzymes75
5962663495Cofactors and coenzymes are _________________ helpers.nonenzyme76
5962679642An enzyme works by binding with _________ at the ________ _______. This forms a ___ _________.substrates, active site, ES complex77
5962693221The active site on an enzyme can lower an activation energy barrier by orienting ___________ correctly, straining ____________ ________, and providing a favorable __________________substrate, substrate bonds, microenvironment78
5962702336An enzyme's activity can be affect by ____ and ____________.pH and temp79
5962709809These bind to the active site of an enzyme, competing with the substrate.competitive inhibitors80
5962715724These bind to another part of an enzyme (not the active site), causing the enzyme to change shape and makes the active site less effective.noncompetitive inhibitors81
5962739456__________ ____________ is the term used to describe cases where a protein's function at one site is affected by binding of a regulatory molecule at another site (can either inhibit or stimulate an enzyme's activity)allosteric regulation82
5962749802A form of allosteric regulation that can amplify enzyme activitycooperativity83
5962757572In ____________ _____________, the end product of a metabolic pathway shuts down the pathway (prevents a cell from wasting resources by making more product than is needed)feedback inhibition84
5962767825Loss of electrons is _________oxidation85
5962767826Gain of electrons is _________reduction86
5962774022Which energy system is used for quick bursts of work?phosphagen87
5962779112Which energy system is for ~1-1.5 minutes of work; no oxygen is neededanaerobic88
5962782911Which energy system is for more than 3 minutes of work; oxygen neededaerobic89
5962795901Phosphagen energy system: maximal rate of ATP production, capacity to make ATPvery fast, very limited90
5962799542Anaerobic energy system: maximal rate of ATP production, capacity to make ATPfast, limited91
5962801901Aerobic energy system: maximal rate of ATP production, capacity to make ATPvery slow, unlimited92

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