Navigation » List of Schools » West Los Angeles College » Chemistry » Chem 221 – Biochemistry for Science Majors » Fall 2021 » L1 The Foundation of Biochemistry
Below are the questions for the exam with the choices of answers:
Question #1
A TRUE
B FALSE
Question #2
A FALSE
B TRUE
Question #3
A TRUE
B FALSE
Question #4
A TRUE
B FALSE
Question #5
A TRUE
B FALSE
Question #6
A TRUE
B FALSE
Question #7
A TRUE
B FALSE
Question #8
A TRUE
B FALSE
Question #9
A FALSE
B TRUE
Question #10
A TRUE
B FALSE
Question #11
A TRUE
B FALSE
Question #12
A FALSE
B TRUE
Question #13
A It increases the activation energy
B It increases the heat of reaction
C It increases the yield
D It increases the rate
Question #14
A Equilibrium constants are not affected by adding a catalyst since no shift in the position of equilibrium occurs.
B A catalyst will increase the activation energy in both directions; therefore, no shift in the position of equilibrium will result.
C Not all chemical reactions respond to catalysts
D The position of equilibrium is not affected by adding a catalyst since a catalyst speeds up both the forward and back reactions by exactly the same amount.
Question #15
A increasing the energy of the transition state
B increasing the activation energy
C increasing the amount of free energy released
D decreasing the activation energy
E decreasing the amount of free energy released
Question #16
A amphibolic
B anabolic
C autotrophic
D catabolic
E heterotrophic
Question #17
A If the Gibbs free energy change for a reaction is negative, the reaction happens spontaneously
B The Gibbs free energy change is the proportion of the enthalpy change of a reaction that is used to increase the entropy
C The Gibbs free energy is represented by the symbol G
D A reaction with a negative Gibbs free energy change of reaction is called an exergonic reaction
Question #18
A Endothermic
B Exothermic
Question #19
A TRUE
B FALSE
Question #20
A zero
B positive
C negative
D infinite
Question #21
A forward
B backward
C spontaneous
D nonspontaneous
Question #22
A forward
B both forward and reverse
C Reaction stops
D reverse
Question #23
A A state of balance in a chemical reaction where the speed of the forward reaction is unequal to the reverse reaction.
B A steady state in which matter is entering and leaving the system at a constant rate.
C A chemical reaction in which the forward and reverse reactions are occurring at the same time and at the same rate.
D A neutralization reaction with equal number of moles of an acid and a base.
Question #24
A the forward process is spontaneous but the reverse process is not
B the free energy change is 0
C both forward and reverse processes have stopped
D the reverse process is spontaneous but the forward process is not.
Question #25
A is considered reversible
B is considered irreversible
Question #26
A products have less energy than reactants
B more activation energy is needed than for an endergonic reaction
C products have more energy than reactants
D less activation energy is needed than for an endergonic reaction
Question #27
A The reaction proceeds with a net release of free energy
B The products have more total energy than the reactants
C A net input of energy from the surroundings is required for the reactions to proceed
D The reaction goes only in a forward direction: all reactants will be converted to products, but no products will be converted to reactants
E The reactions are rapid
Question #28
A coupling them with exergonic reactions via a common intermediate
B coupling them to the hydrolysis of ATP
C manipulating the concentrations of products and reactants such that ΔG < 0
D all of the above
Question #29
A endergonic
B exergonic
C at equilibrium
D exothermic
E endothermic
Question #30
A Removing a product shifts a reversible reaction in the direction of formation of products.
B Adding a product causes a reversible reaction to shift in the direction of the formation of the reactants.
C Adding a reactant always shifts a reversible reaction in the direction of reactants.
D Removing a reactant always shifts a reversible reaction in the direction of reactants.
Question #31
A Keq = 0.002
B Keq = 0.0
C Keq =6.0×10^-4
D Keq = 3.5
Question #32
A endothermic
B exergonic
C at equilibrium
D exothermic
E endergonic
Question #33
A the reverse reaction has stopped.
B the forward reaction has stopped.
C both the forward and the reverse reactions have stopped.
D neither the forward nor the reverse reaction has stopped
E the sum of the concentrations of A and B must equal the sum of the concentrations of C and D.
Question #34
A If ΔG for a reaction is negative, the forward reaction happens spontaneously
B If the equilibrium constant is very large, ΔG is positive
C Catalysts do not alter the position of equilibrium: they do not shift the equilibrium to the left or right
D At equilibrium, ΔG = 0
Question #35
A The reaction lies in the middle
B The reaction lies to the right
C The reaction lies to the left
Question #36
A FALSE
B TRUE
Question #37
A At equilibrium, the forward and back reactions cease to occur
B At equilibrium, there is no net change in the system
C At equilibrium, the concentration of reactants and products stays the same
D At equilibrium, the rates of the forward and back reactions are identical
Question #38
A When an isolated system undergoes a spontaneous change, the entropy of the system will increase
B At absolute zero, the entropy of a perfect crystal is considered to be zero
C Energy can be neither created nor destroyed
D The internal energy of the universe is constant
Question #39
A The energy released when chemical bonds are formed during a chemical reaction
B The energy consumed when chemical bonds are broken during a chemical reaction
C The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction
D The increase in disorder of the system as a reaction proceeds
Question #40
A Energy can be converted from one form to another
B The total energy in a chemical universe (a system and its surroundings) is constant
C An object suspended in the air has more energy than an object lying on the ground
D The energy stored in chemical bonds is referred to as kinetic energy
Question #41
A TRUE
B FALSE
Question #42
A dynamic steady state
B waste of energy
C exergonic change
D free-energy change
E equilibrium state
Question #43
A diastereoisomers
B geometric isomers
C cis-trans isomers
D enantiomers
E anomers
Question #44
A Tetrahedral
B Trigonal pyramidal
C Trigonal planar
D Linear
E Trigonal bipyramidal
Question #45
A aldehyde
B ether
C ketone
D ester
E carboxylic acid
Question #46
A are the reactions of the functional groups
B require an enzyme in all cases
C are independent of the functional groups
D all of the above
Question #47
A open systems
B thermally isolated
C closed systems
D isolated systems
E none of the above
Question #48
A A living cell tries to maintain a steady state
B Chemotrophs rely on chemical compounds derived from other organisms
C All living organisms try to be in equilibrium
D Organisms use metabolic processes to obtain the free energy they need to carry out various functions
E Maintaining a steady state is coupled to a flux of metabolites
Question #49
A S
B C
C H
D O
E N