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