,Chapter 1hu Introduction to Biochemistry of life hu hu hu hu
1) Which h u elements h u account h u for h u more h u than h u 97% h u of h u the h u weight h u of h u most
h u organisms?
A) C, h u H, h u N, h u Mg, h u O, h u S
B) C, h u H, h u N, h u O, h u P, h u S
C) C, h u H, h u N
D) Fe, h u C, h u H, h u O, h u P
E) Ca2+, h u K+, h u Na+, h u Mg2+, h u Cl-
Answer: h u h u B
Page h u Ref: h u Section h u 2
2) Proteins h u in h u biological h u membranes h u h u may h u be
A) porous.
B) attached h u to h u the h u membrane h u surface.
C) span h u the h u membrane.
D) All h u of h u the h u above
E) B h u and h u C h u only
Answer: h u h u D
Page h u Ref: h u Section h u 3
3) Which h u statement h u about h u cellulose h u is h u false?
A) It h u is h u the h u most h u abundant h u polysaccharide h u in h u nature.
B) Its h u monomers h u are h u joined h u by h u glycosidic h u bonds.
C) It h u is h u present h u in h u the h u stems h u of h u flowering h u plants.
D) The h u hydroxyl h u groups h u of h u neighboring h u cellulose h u molecules h u interact
h u to h uform h u strong, huinsoluble hufibers.
E) It h u is h u a h u branched h u polymer h u of h u glucose.
Answer: h u h u E
Page h u Ref: h u Section h u 3
1
,4) When h u Keq h u of h u a h u reaction h u = h u 1, h u then
A) the h u forward h u reaction h u is h u faster h u than h u the h u reverse h u reaction.
B) the h u reverse h u reaction h u is h u faster h u than h u the h u forward h u reaction.
C) the h u forward h u and h u reverse h u reaction h u rate h u constants h u are h u equal.
D) more h u products h u are h u formed h u than h u reactants.
E) fewer h u products h u are h u formed h u than h u reactants.
Answer: h u h u C
Page h u Ref: h u Section h u 4
5) Which h u statement h u is h u true h u about h u a h u reaction h u with h u an h u equilibrium h u constant, h u K eq,
h u equal h u to h u 1000?
A) The h u forward h u rate h u constant h u is h u 1000 h u times h u greater h u than h u the h u reverse h u rate
h u constant.
B) The h u forward h u rate h u constant h u is h u 3 h u times h u greater h u than h u reverse h u rate
h u constant.
C) The h u forward h u rate h u constant h u is h u 1000 h u times h u smaller h u than h u the h u reverse h u rate
h u constant.
D) The h u forward h u rate h u constant h u is h u 3 h u times h u smaller h u than h u the h u reverse h u rate
h u constant.
E) There h u is h u not h u enough h u information h u given h u to h u compare h u the h u forward h u and
h u reverse h u rate h u constants.
Answer: h u h u A
Page h u Ref: h u Section h u 4
6) The h u study h u of h u the h u energy h u changes h u during h u metabolic h u reactions h u is h u called hu.
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biological h u heat h u dynamics
Answer: h u h u D
Page h u Ref: h u Section h u 4
7) A h u spontaneous h u chemical h u reaction h u always h u h u has h u a change.
A) positive h u Gibbʹs h u free h u energy
B) negative h u Gibbʹs h u free h u energy
C) positive h u enthalpy
D) negative h u enthalpy
E) positive h u entropy
2
, Answer: h u h u B
Page h u Ref: h u Section h u 4
3
1) Which h u elements h u account h u for h u more h u than h u 97% h u of h u the h u weight h u of h u most
h u organisms?
A) C, h u H, h u N, h u Mg, h u O, h u S
B) C, h u H, h u N, h u O, h u P, h u S
C) C, h u H, h u N
D) Fe, h u C, h u H, h u O, h u P
E) Ca2+, h u K+, h u Na+, h u Mg2+, h u Cl-
Answer: h u h u B
Page h u Ref: h u Section h u 2
2) Proteins h u in h u biological h u membranes h u h u may h u be
A) porous.
B) attached h u to h u the h u membrane h u surface.
C) span h u the h u membrane.
D) All h u of h u the h u above
E) B h u and h u C h u only
Answer: h u h u D
Page h u Ref: h u Section h u 3
3) Which h u statement h u about h u cellulose h u is h u false?
A) It h u is h u the h u most h u abundant h u polysaccharide h u in h u nature.
B) Its h u monomers h u are h u joined h u by h u glycosidic h u bonds.
C) It h u is h u present h u in h u the h u stems h u of h u flowering h u plants.
D) The h u hydroxyl h u groups h u of h u neighboring h u cellulose h u molecules h u interact
h u to h uform h u strong, huinsoluble hufibers.
E) It h u is h u a h u branched h u polymer h u of h u glucose.
Answer: h u h u E
Page h u Ref: h u Section h u 3
1
,4) When h u Keq h u of h u a h u reaction h u = h u 1, h u then
A) the h u forward h u reaction h u is h u faster h u than h u the h u reverse h u reaction.
B) the h u reverse h u reaction h u is h u faster h u than h u the h u forward h u reaction.
C) the h u forward h u and h u reverse h u reaction h u rate h u constants h u are h u equal.
D) more h u products h u are h u formed h u than h u reactants.
E) fewer h u products h u are h u formed h u than h u reactants.
Answer: h u h u C
Page h u Ref: h u Section h u 4
5) Which h u statement h u is h u true h u about h u a h u reaction h u with h u an h u equilibrium h u constant, h u K eq,
h u equal h u to h u 1000?
A) The h u forward h u rate h u constant h u is h u 1000 h u times h u greater h u than h u the h u reverse h u rate
h u constant.
B) The h u forward h u rate h u constant h u is h u 3 h u times h u greater h u than h u reverse h u rate
h u constant.
C) The h u forward h u rate h u constant h u is h u 1000 h u times h u smaller h u than h u the h u reverse h u rate
h u constant.
D) The h u forward h u rate h u constant h u is h u 3 h u times h u smaller h u than h u the h u reverse h u rate
h u constant.
E) There h u is h u not h u enough h u information h u given h u to h u compare h u the h u forward h u and
h u reverse h u rate h u constants.
Answer: h u h u A
Page h u Ref: h u Section h u 4
6) The h u study h u of h u the h u energy h u changes h u during h u metabolic h u reactions h u is h u called hu.
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biological h u heat h u dynamics
Answer: h u h u D
Page h u Ref: h u Section h u 4
7) A h u spontaneous h u chemical h u reaction h u always h u h u has h u a change.
A) positive h u Gibbʹs h u free h u energy
B) negative h u Gibbʹs h u free h u energy
C) positive h u enthalpy
D) negative h u enthalpy
E) positive h u entropy
2
, Answer: h u h u B
Page h u Ref: h u Section h u 4
3
