,Chapter 1ds Introduction to Biochemistry of life ds ds ds ds
1) Which d s elements d s account d s for d s more d s than d s 97% d s of d s the d s weight d s of d s most d s organisms?
A) C, d s H, d s N, d s Mg, d s O, d s S
B) C, d s H, d s N, d s O, d s P, d s S
C) C, d s H, d s N
D) Fe, d s C, d s H, d s O, d s P
E) Ca2+, d s K+, d s Na+, d s Mg2+, d s Cl-
Answer: d s d s B
Page Ref:
d s d s Section d s 2
2) Proteins d s in d s biological d s membranes d s d s may d s be
A) porous.
B) attached d s to d s the d s membrane d s surface.
C) span d s the d s membrane.
D) All d s of d s the d s above
E) B d s and d s C d s only
Answer: d s d s D
Page Ref:
d s d s Section d s 3
3) Which d s statement d s about d s cellulose d s is d s false?
A) It d s is d s the d s most d s abundant d s polysaccharide d s in d s nature.
B) Its d s monomers d s are d s joined d s by d s glycosidic d s bonds.
C) It d s is d s present d s in d s the d s stems d s of d s flowering d s plants.
D) The d s hydroxyl groups of neighboring d s d s d s d s cellulose d s molecules d s interact
d s to d form
s strong, insoluble fibers. d s ds ds
E) It d s is d s a d s branched d s polymer d s of d s glucose.
Answer: d s d s E
Page Ref:
d s d s Section d s 3
1
,4) When d s Keq d s of d s a d s reaction d s = 1, d s d s then
A) the d s forward d s reaction d s is d s faster d s than d s the d s reverse d s reaction.
B) the d s reverse d s reaction d s is d s faster d s than d s the d s forward d s reaction.
C) the d s forward d s and d s reverse d s reaction d s rate d s constants d s are d s equal.
D) more d s products d s are d s formed d s than d s reactants.
E) fewer d s products d s are d s formed d s than d s reactants.
Answer: d s d s C
Page Ref: d s d s Section d s 4
5) Which d s statement d s is d s true d s about d s a d s reaction d s with d s an d s equilibrium d s constant, d s Keq,
d s equal d s to d s 1000?
A) The forward d s d s rate d s constant d s is d s 1000 d s times d s greater d s than d s the d s reverse d s rate
constant.
d s
B) The d s forward d s rate d s constant d s is d s 3 d s times d s greater d s than d s reverse d s rate d s constant.
C) The forward d s d s rate d s constant d s is d s 1000 d s times d s smaller d s than d s the d s reverse d s rate
constant.
d s
D) The forward d s d s rate d s constant d s is d s 3 d s times d s smaller d s than d s the d s reverse d s rate
constant.
d s
E) There is d s d snot d s enough information d s d s given d s to d s compare d s the d s forward d s and
reversed s d s rate d s constants.
Answer: d s d s A
Page Ref: d s d s Section d s 4
6) The d s study d s of d s the d s energy d s changes d s during d s metabolic d s reactions d s is d s called . ds
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biological d s heat d s dynamics
Answer: d s d s D
Page Ref: d s d s Section d s 4
7) A d s spontaneous d s chemical d s reaction d s always d s d s has d s a change.
A) positive d s Gibbʹs d s free d s energy
B) negative d s Gibbʹs d s free d s energy
C) positive d s enthalpy
D) negative d s enthalpy
E) positive d s entropy
Answer: d s d s B
2
, Page d s Ref: d s Section d s 4
3
1) Which d s elements d s account d s for d s more d s than d s 97% d s of d s the d s weight d s of d s most d s organisms?
A) C, d s H, d s N, d s Mg, d s O, d s S
B) C, d s H, d s N, d s O, d s P, d s S
C) C, d s H, d s N
D) Fe, d s C, d s H, d s O, d s P
E) Ca2+, d s K+, d s Na+, d s Mg2+, d s Cl-
Answer: d s d s B
Page Ref:
d s d s Section d s 2
2) Proteins d s in d s biological d s membranes d s d s may d s be
A) porous.
B) attached d s to d s the d s membrane d s surface.
C) span d s the d s membrane.
D) All d s of d s the d s above
E) B d s and d s C d s only
Answer: d s d s D
Page Ref:
d s d s Section d s 3
3) Which d s statement d s about d s cellulose d s is d s false?
A) It d s is d s the d s most d s abundant d s polysaccharide d s in d s nature.
B) Its d s monomers d s are d s joined d s by d s glycosidic d s bonds.
C) It d s is d s present d s in d s the d s stems d s of d s flowering d s plants.
D) The d s hydroxyl groups of neighboring d s d s d s d s cellulose d s molecules d s interact
d s to d form
s strong, insoluble fibers. d s ds ds
E) It d s is d s a d s branched d s polymer d s of d s glucose.
Answer: d s d s E
Page Ref:
d s d s Section d s 3
1
,4) When d s Keq d s of d s a d s reaction d s = 1, d s d s then
A) the d s forward d s reaction d s is d s faster d s than d s the d s reverse d s reaction.
B) the d s reverse d s reaction d s is d s faster d s than d s the d s forward d s reaction.
C) the d s forward d s and d s reverse d s reaction d s rate d s constants d s are d s equal.
D) more d s products d s are d s formed d s than d s reactants.
E) fewer d s products d s are d s formed d s than d s reactants.
Answer: d s d s C
Page Ref: d s d s Section d s 4
5) Which d s statement d s is d s true d s about d s a d s reaction d s with d s an d s equilibrium d s constant, d s Keq,
d s equal d s to d s 1000?
A) The forward d s d s rate d s constant d s is d s 1000 d s times d s greater d s than d s the d s reverse d s rate
constant.
d s
B) The d s forward d s rate d s constant d s is d s 3 d s times d s greater d s than d s reverse d s rate d s constant.
C) The forward d s d s rate d s constant d s is d s 1000 d s times d s smaller d s than d s the d s reverse d s rate
constant.
d s
D) The forward d s d s rate d s constant d s is d s 3 d s times d s smaller d s than d s the d s reverse d s rate
constant.
d s
E) There is d s d snot d s enough information d s d s given d s to d s compare d s the d s forward d s and
reversed s d s rate d s constants.
Answer: d s d s A
Page Ref: d s d s Section d s 4
6) The d s study d s of d s the d s energy d s changes d s during d s metabolic d s reactions d s is d s called . ds
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biological d s heat d s dynamics
Answer: d s d s D
Page Ref: d s d s Section d s 4
7) A d s spontaneous d s chemical d s reaction d s always d s d s has d s a change.
A) positive d s Gibbʹs d s free d s energy
B) negative d s Gibbʹs d s free d s energy
C) positive d s enthalpy
D) negative d s enthalpy
E) positive d s entropy
Answer: d s d s B
2
, Page d s Ref: d s Section d s 4
3
