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chapter 6 PLTL
Terms in this set (17)
What is a exergonic reaction?
proceeds with a net release of free energy and is spontaneous; negative
What is a endergonic reaction?
chemical reaction that requires energy has a positive change in G; non spontaneous; products are higher than reactants
what does the change in Gibbs free energy represent to living organisms?
negative : that energy is usable by organisms
positive : input of energy is needed
what type of molecules is ATP?
which part of the ATP molecule stores energy?
cells use the energy from exergonic reactions to drive endergonic reactions. hydrolysis of ATP, breaking the bond between the second and third phosphate, is exergonic. the change in G is -7.3 kcal/mol. three endergonic reactions are listed below with their change in Gs. which ones could be driven by hydrolysis of a molecule of ATP and which could not? why?
conversion of glutamate to glutamine : G = +3.4 kcal/mol
phosphorylation of pyruvate : G = +14.8 kcal/mol
phosphorylation of glucose : G = +3.3 kcal/mol
conversion of glutamate to glutamine : G = +3.4 kcal/mol --> YES
phosphorylation of pyruvate : G = +14.8 kcal/mol --> NO
phosphorylation of glucose : G = +3.3 kcal/mol --> YES
breakdown of molecules and release of energy
builds up molecules and requires energy
the peaks (highest point) of the two curves represent the Gibbs free energy of what compound?
the amount of Gibbs free energy is called the ______ energy
describe how the enzyme increases the rate of the reaction
reduces activation energy by stabilizing the transition state
which type of enzyme inhibition can be overcome by adding a large excess of substrate?
the pathway of cellular respiration, breaks down food molecules such as glucose, to release the energy stored in them and use it to make ATP. would you consider cellular respiration to be catabolic or anabolic?
the pathway of cellular respiration, breaks down food molecules such as glucose, to release the energy stored in them and use it to make ATP. would you consider cellular respiration to be exergonic or endergonic?
the process of photosynthesis, uses energy from sunlight to build carbon dioxide into sugars like glucose. would you consider photosynthesis to be catabolic or anabolic?
the process of photosynthesis, uses energy from sunlight to build carbon dioxide into sugars like glucose. would you consider photosynthesis to be exergonic or endergonic?
Suppose you ignite a sheet of paper from your notebook using a match and allow the fire to burn until it dies out. If you could measure all the energy in the resulting combustion products, and all the energy in the heat released (including whatever increase in disorder has occurred), would you predict this amount to be more than, less than, or the same as the amount of potential energy in the sheet of paper you started with? (You should ignore the activation energy provided by the match to light the paper.)
same energy as the paper
THIS SET IS OFTEN IN FOLDERS WITH...
chapter 5 reading questions
chapter 8 launchpad
chapter 12 PLTL
chapter 4 PLTL
OTHER SETS BY THIS CREATOR
exam 5 practice (ch 18-22)