Module 3 graded quiz
CO2
Greatest Oxidaton
If a reaction is energetically favorable, then it must produce a
Increase in entropy
CH3OH
Intermediate oxidation
CH 4
Least oxidation
Enzymes increase the energy speed of a chemical reaction because they
Lower the activation energy needed to start the reaction
Why is the oxidation of NADPH energetically favorable?
The oxidized form of NADPH is more stable than the reduced form.
Why is CO2 an end product of cellular respiration?
because it is the most stable form of carbon in our atmosphere
Why is sunlight the ultimate source of energy for nearly all living things on Earth?
because photosynthetic organisms produce food molecules using light energy
The energy used by the cell to generate specific biological molecules and highly ordered structures is stored in the form of _____________.
chemical bonds
Catalysts are molecules that lower the activation energy for a given reaction. Cells produce their own catalysts called _____________.
enzymes
Living systems can generate and maintain order without violating the second law of thermodynamics because they generate
heat
Condensation reactions are energetically __________ and hydrolysis reactions are energetically ________
unfavorable, favorable
Reactions that break down molecules into smaller ones
Catabolic
What is the value of Delta G at equilibrium ?
Zero
Reactions that build larger molecules in the cell
Anabolic
Cellular respiration _______ energy and produces ________, whereas photosynthesis ________ energy and produces _________
Consumes; oxygen + sugars; produces;water + carbon dioxide
What is the relationship between Delta G and Delta G degrees?
Delta G 0 is the free energy change at standard temperature and concentrations
During respiration sugar is reduced and O2 is oxidized
False
The first law of thermodynamics states that the total amount of energy in the Universe is always decreasing
False
In an enzymatic reaction, a molecule gains an electron. Known as a
Reduction reaction
What is a reason ATP hydrolysis has a negative delta G0?
The removal of the phosphate is energetically favorable
What is the role of activated carriers in cells?
They capture energy from energy releasing reactions and transfer it to other reactions.
Ice is more ordered than water
True
The second law of thermodynamics state that the disorder in any system is always increasing
True
If the products of a reaction have more free energy than the reactants, then that reaction is
not energetically favorable