rinciples_of_biochemistry_4th_edition_horton_test_bank.pdf

,Contents
Chapter3 f 3 f 1 Introduction3 f 3 f to3 f 3 f Biochemistry 1
Chapter 2 Water 10
Chapter 3 Amino Acids3 f and 27
the3 f Primary3 f Structures3 f of3fProteins
Chapter 4 Proteins:3 f 3 f Three-Dimensional3 f 3 f Structure 46
and3 f 3 f Function
Chapter 5 Properties of3 f 3 f Enzymes 65
Chapter 6 Mechanisms of3 f 3 f Enzymes 85
Chapter 7 Coenzymes and3 f 3 f Vitamins 104
Chapter 8 Carbohydrates 119
Chapter 9 Lipids and3 f 3 f Membranes 137
Chapter3 f 3 f 1 Introduction3 f 3 f to3 f 3 f Metabolism 153
0
Chapter 11 Glycolysis 169
Chapter 12 Gluconeogenesis, The Pentose3 f 3 f Phosphate Pathway,
and Glycogen Metabolism 185
Chapter 13 The Citric Acid Cycle 199
Chapter 14 Electron Transport3 f 3 f and3 f 3 f Oxidative3 f 3 f Phosphorylation 213
Chapter3 f 3 f 1 Photosynthesis 227
5
Chapter 16 Lipid Metabolism 241
Chapter 17 Amino Acid3 f 3 f Metabolism 256
Chapter 18 Nucleotide Metabolism 269
Chapter 19 Nucleic Acids 284
Chapter3 f 3 f 2 DNA3 f 3 f Replication,3 f 3 f Repair,3 f 3 f and3 f 3 f Recombination 300
0
Chapter 21 Transcription3 f 3 f and3 f 3 f RNA3 f 3 f Processing 315
Chapter3 f 3 f 2 Protein3 f 3 f Synthesis 330
2
Chapter 23 Recombinant DNA Technology 348

,Chapter 1 Introduction to Biochemistry
3f 3 f 3 f




1) Which elements account for more than 97% of the weight of
most3forganisms?
C, H, N, Mg, O, S
C, H, N, O, P, S
C, H, N3f
Fe, C, H, O, P
E)3f , K+, Na+, Mg2+, Cl-


Answer: B
Page Ref: Section 2
2) Proteins in biological membranes may be
A) porous.
B) attached to the membrane surface.
C) span the membrane.
D) All of the above
E) B and C only

Answer: D
Page Ref: Section 3


3) Which statement about cellulose is false?
A) It is the most abundant polysaccharide in nature.
B) Its monomers are joined by glycosidic bonds.
C) It is present in the stems of flowering plants.
D) The hydroxyl groups of neighboring cellulose molecules interact to
form3fstrong, insolublefibers.
E) It is a branched polymer of glucose.

Answer: E
Page Ref: Section 3




1

, 4) When Keq3 f 3 f ofa reaction = 1, then

A) the forward reaction is faster than the reverse reaction.
B) the reverse reaction is faster than the forward reaction.
C) the forward and reverse reaction rate constants are equal.
D) more products are formed than reactants.
E) fewer products are formed than reactants.

Answer: C
Page Ref: Section 4


5) Which statement is true about a reaction with an equilibrium constant,
Keq,3fequal to 1000?

A) The forward rate constant is 1000 times greater than the reverse
rate3fconstant.
B) The forward rate constant is 3 times greater than reverse
rate3fconstant.
C) The forward rate constant is 1000 times smaller than the reverse
rate3fconstant.
D) The forward rate constant is 3 times smaller than the reverse
rate3fconstant.
E) There is 3fnot enough information given to compare the forward
and3freverse rate 3fconstants.


Answer: A
Page Ref: Section 4


6) The study of the energy changes during metabolic reactions is called .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biological heat dynamics

Answer: D
Page Ref: Section 4


7) A spontaneous chemical reaction always has a change.
A) positive Gibbʹs free energy
B) negative Gibbʹs free energy
C) positive enthalpy
D) negative enthalpy
E) positive entropy


2