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BMSC 230 (100% Correct Answers).
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BMSC 230 (100% Correct Answers).
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BMSC 230 (100% Correct Answers) catabolism - correct answer --breakdown biomolecules to produce energy anabolism - correct answer --synthesis of biomolecules , requires input of energy Functions of metabolism - correct answer --1) to obtain chemical energy in form of ATP from the degradation of energy -rich nutrients from environment 2) convert molecules that we ingest as food into the building blocls of larger molecules neded in the body 3) assembles these small buildi ng block molecules into larger molecules such as protiens, nucleic acids, lipids, polysaccharides 4) synthesize & degrade biomolecules that have specialized functions in cells glycolysis - correct answer --starts with glucose converts to pyruvate path ways can be - correct answer --1) linear 2) branched 3) circular first committed step - correct answer --- often the first reaction - usually a point of regulation living organisms require a continual input of free energy (3) becuase : - correct a nswer --1) performance of mechanical work 2) active transport of biomolecules and ions 3) synthesis of macromolecules from simple precursors enzymes - correct answer --- speed up the rate of a chemical reaction - DONT change the equilibrium, just rate at which it reaches it two thermodynamic properties - correct answer --1) free energy differences between products and reactants 2) free energy required to initiate the conversion of reactants to products * free energy difference determines whether a reaction will take place spontaneously * reactions take place if... - correct answer --delta G is NEGATIVE exergonic - correct answer --release energy endergonic - correct answer --requires input of en ergy determining delta G - correct answer --... ATP - correct answer --- is the donor of most free energy for most energy requiring processes in the cell - has high phosphoryl -transfer potential - readily transfers phosphate groups to water the hi gh energy bonds in ATP are: - correct answer --acid anhydride bonds = 2 of them large standard energy change due to: (4) - correct answer --1) electrostatic repulsion 2) when ATP hydrolyzed the electrostatic repulsion is reduced 3) resonance stabili zaton 4) increase in entropy 5) stabilizaiton by hydration oxidation reactions - correct answer --loss of electrons from the molecule being oxidized and the gain of electrons by another molecule that is reduced the more reduced a carbon is to begin with - correct answer --the more free energy is released by its oxidation The final electron acceptor in the respiratory chain is: - correct answer --O2 How many protons are required to synthesize one ATP molecul e by oxidative phosphorylation? - correct answer --3 The ATP that is synthesized in the mitochondrial matrix: - correct answer --is derived solely from the reaction catalyzed by ATP synthase. ATP synthase is hypothesized to use a "binding change mech anism" which describes: - correct answer --how the rotation of the γ -subunit of ATP synthase changes the conformation of the β -subunits, which facilitates ATP synthesis. Which of the statements below about cytochromes - correct answer --- They are inv olved in redox reactions. - They are proteins that contain iron - The heme in cytochromes is covalently linked to the protein moiety. Which statement about reactive oxygen species (ROS) is CORRECT? - correct answer --ROS are highly reactive with many bi omolecules in the cell. What cellular compartment are the electron transport chain complexes located in? - correct answer --
The inner mitochondrial membrane. Two products formed from the electron transport chain are - correct answer --H2O and ATP Which statement about chemical uncouplers of oxidative phosphorylation - correct answer --- They stimulate the breakdown of fat. - They have promise as anti -obesity drugs. - They can cause an increase in body temperature.
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