1.04 IKE Energy and Enzymes

a cell cannot expend energy to accomplish work the delta G is zero for all of the cell's reactions

Choose all that apply: if all of a cell's reactions are at chemical equilibrium, no reactions occur in the cell a cell cannot expend energy to accomplish work all of a cell's energy expenditure is given off as waste heat the delta G is zero for all of the cell's reactions

Living organisms use energy to decrease their own entropy, but generate waste heat that increases the total entropy of the organism and its environment.

If entropy always increases, then how do living organisms create macromolecules, cells, and complex higher-order structures? The laws of thermodynamics do not apply to living organisms. Living organisms use energy from the sun to accomplish the work of decreasing entropy. Living organisms use energy to decrease their own entropy, but generate waste heat that increases the total entropy of the organism and its environment. Living organisms convert light energy or chemical energy into organic matter. The increase in entropy as the organism grows is balanced by a decrease in entropy of the universe

The glucose molecules lack the activation energy at room temperature

The oxidation of glucose to CO2 and H2O is highly exergonic; ΔGo = -636 kcal/mole. Why doesn't glucose spontaneously combust? The glucose molecules lack the activation energy at room temperature The oxidation of glucose is not spontaneous CO2 has higher energy than glucose The formation of 6 CO2 molecules from one glucose molecule decreases entropy The water molecules quench the reaction

d

Which energy change labeled by a lower case letter (a-e) would be the same in both the enzyme-catalyzed and uncatalyzed reactions? a b c d e

c

Which shows noncompetitive inhibition by an allosteric regulator? a b c