JMU BIO 140 UPDATED EXAMS TEST PAPER
QUESTIONS AND ANSWERS SURE A+
✔✔Potential energy can be released when what happens? - ✔✔structure or position is
changed
✔✔Chemical energy is a form of what type of energy? - ✔✔potential
✔✔Strong bonds have ________ potential energy than weak bonds. - ✔✔less
✔✔Why are phosphate bonds so weak? - ✔✔the negatively charged oxygens repel one
another
✔✔What is the first law of thermodynamics? - ✔✔energy is neither created nor
destroyed, it simply changes from one form to another
✔✔How would you calculate the kinetic energy of a ball which rolled down the steps? -
✔✔potential energy at the top minus the potential energy at the bottom of the stairs
✔✔How is energy released in electrons? - ✔✔heat or lights
, ✔✔Define the second law of thermodynamic - ✔✔the amount of disorder (entropy)
increases when energy is transformed -> some energy is unable to do work
✔✔Define entropy - ✔✔A measure of disorder or randomness (energy not available to
do work)
✔✔In the universe, the degree of disorder can only _________? - ✔✔increase
✔✔Define gibbs free energy - ✔✔energy available to do work
✔✔∆G= what - ✔✔G products-G reactants
✔✔If the products have more free energy than the reactants the ∆G is what? -
✔✔positive
✔✔Endergonic reaction graph - ✔✔
✔✔If the products have lesfree energy than the reactants the ∆G is what? - ✔✔negative
✔✔Exergonic reaction graph - ✔✔
✔✔Define ∆H - ✔✔enthalpy - chemical energy in bonds
✔✔Define ∆S - ✔✔entropy
✔✔What is the equation for ∆ change in a system? - ✔✔∆H=∆G - T∆S
✔✔Is an endergonic reaction spontaneous or not? - ✔✔non-spontaneous
✔✔Is an exergonic reaction spontaneous or not? - ✔✔spontaneous
✔✔If your ∆G is positive what is your ∆S and ∆H? - ✔✔-∆S and ∆H
✔✔If your ∆G is negative what is your ∆S and ∆H? - ✔✔+∆S and -∆H
✔✔Is ∆G positive or negative in an anabolic reaction? - ✔✔positive
✔✔Is ∆G positive or negative in an catabolic reaction? - ✔✔negative
✔✔What type of reaction is hydrolysis? - ✔✔exergonic
✔✔Define energetic coupling - ✔✔spontaneous reaction drives a non-spontaneous
reaction
QUESTIONS AND ANSWERS SURE A+
✔✔Potential energy can be released when what happens? - ✔✔structure or position is
changed
✔✔Chemical energy is a form of what type of energy? - ✔✔potential
✔✔Strong bonds have ________ potential energy than weak bonds. - ✔✔less
✔✔Why are phosphate bonds so weak? - ✔✔the negatively charged oxygens repel one
another
✔✔What is the first law of thermodynamics? - ✔✔energy is neither created nor
destroyed, it simply changes from one form to another
✔✔How would you calculate the kinetic energy of a ball which rolled down the steps? -
✔✔potential energy at the top minus the potential energy at the bottom of the stairs
✔✔How is energy released in electrons? - ✔✔heat or lights
, ✔✔Define the second law of thermodynamic - ✔✔the amount of disorder (entropy)
increases when energy is transformed -> some energy is unable to do work
✔✔Define entropy - ✔✔A measure of disorder or randomness (energy not available to
do work)
✔✔In the universe, the degree of disorder can only _________? - ✔✔increase
✔✔Define gibbs free energy - ✔✔energy available to do work
✔✔∆G= what - ✔✔G products-G reactants
✔✔If the products have more free energy than the reactants the ∆G is what? -
✔✔positive
✔✔Endergonic reaction graph - ✔✔
✔✔If the products have lesfree energy than the reactants the ∆G is what? - ✔✔negative
✔✔Exergonic reaction graph - ✔✔
✔✔Define ∆H - ✔✔enthalpy - chemical energy in bonds
✔✔Define ∆S - ✔✔entropy
✔✔What is the equation for ∆ change in a system? - ✔✔∆H=∆G - T∆S
✔✔Is an endergonic reaction spontaneous or not? - ✔✔non-spontaneous
✔✔Is an exergonic reaction spontaneous or not? - ✔✔spontaneous
✔✔If your ∆G is positive what is your ∆S and ∆H? - ✔✔-∆S and ∆H
✔✔If your ∆G is negative what is your ∆S and ∆H? - ✔✔+∆S and -∆H
✔✔Is ∆G positive or negative in an anabolic reaction? - ✔✔positive
✔✔Is ∆G positive or negative in an catabolic reaction? - ✔✔negative
✔✔What type of reaction is hydrolysis? - ✔✔exergonic
✔✔Define energetic coupling - ✔✔spontaneous reaction drives a non-spontaneous
reaction
