BCMB 401 exam 3 Questions With Complete Solutions

catabolic correct answer: A process in which large molecules are broken down to use energy Anabolic correct answer: A process in which large molecules are built from small molecules (uses energy to form molecules) amphibolic pathways correct answer: metabolic pathways that have both catabolic and anabolic functions most reactions in pathways are _______ correct answer: reversible most reactions delta G is close to _______ correct answer: 0 irreversible reactions have a ________ delta G correct answer: very negative irreversible reactions are points of _______ for metabolic paths correct answer: regulatory regulatory steps in metabolic paths are usually ________ effectors by ___________ (modification) correct answer: allosteric, phosphorylation key regulatory step usually called the correct answer: committed step (PFK-1) more energetically favorable to remove ____ phosphates from ATP correct answer: 2 creating AMP, very uncommon though AMP is very difficult to ________ to ATP, so we dont do it correct answer: convert back ATP is very energetically __________ correct answer: unfavorable reasons why ATP is very energetically unfavorable correct answer: 1. electrostatic repulsion correct answer: removing gamma phosphate lessens the tension between the three phosphates 2. Resonance structures correct answer: Phosphates in ATP has 3 resonance structures but ADP and P have 4 resonance structures 3. increase in entropy correct answer: 2 molecules more entropy than 1 4. stabilization due to hydration correct answer: more resonance structures means more sites to hydrogen bond making more stable in ADP and P Creatine phosphate directly _______ ADP to form ATP because it has _______ phosphorylation potential correct answer: phosphorylates, higher Creatine phosphate works from _________ correct answer: 10 sec to 2 min 90% of our ATP comes from _________ correct answer: oxidative phosphorylation (glucose or fats broken down) the more _________ a carbon atom is the more free energy is released when it is ___________ correct answer: reduced, oxidized carbon atoms are ________ to produce CO2 and the electrons