BIOCHEMISTRY SIMPLIFIED QUICK
REVSION QUESTIONS AND
ANSWERS
When delta G is negative, which of the following is not true?
A) it favors products
B) it gives off heat
C) it is spontaneous
D) it is instantaneous
E) it is exergonic
it is not instantaneous
Which of the following does not contain a carbonyl?
A) ester
B) carboxylic acid
C) ketone
D) ether
E) amide
ether
Which of the following is not a protein?
A) albumin
B) collagen
,C) cellulose
D) peptide hormones
E) enzymes
cellulose
What is hydrolysis?
breakdown of large molecules by the addition of water
What bases correspond to RNA?
AUGC
What are enzymes?
catalysts that lower the activation energy; speed up the rate of
reactions
Entropy is a measure of:
disorder (favorable)
Which is true regarding coupled reactions?
A) need 2 or more steps in reaction mechanism
B) none are true
C) the overall delta G is exergonic
D) they typically have intermediates
E) all are true
all are true
Raising the pH will cause what to occur on the oxygen affinity
plot of Hb?
, A) a shift from sigmoidal curve to hyperbolic curve
B) a shift to the left of the sigmoidal curve
C) an increase in the oxygen affinity
D) a shift to the right of the sigmoidal curve
a shift to the left of the sigmoidal curve
Which of the following favors the formation of products in a
reaction?
A) none
B) Keq= 1, Delta G = 0
C) Keq < 1, Delta G > 0
D) Keq > 1, Delta G > 0
E) Keq > 1, Delta G < 0
Keq > 1, Delta G < 0
What type of secondary structure does collagen have?
a-helices
Which of the following is true regarding pKa?
A) a high Ka will indicate a high pKa
B) the pKa = the isolectric point
C) higher pKa's are more acidic than lower pKa's
D) lower pKa's are more acidic than higher pKa's
E) pKa = pH
lower pKa's are more acidic than higher pKa's
REVSION QUESTIONS AND
ANSWERS
When delta G is negative, which of the following is not true?
A) it favors products
B) it gives off heat
C) it is spontaneous
D) it is instantaneous
E) it is exergonic
it is not instantaneous
Which of the following does not contain a carbonyl?
A) ester
B) carboxylic acid
C) ketone
D) ether
E) amide
ether
Which of the following is not a protein?
A) albumin
B) collagen
,C) cellulose
D) peptide hormones
E) enzymes
cellulose
What is hydrolysis?
breakdown of large molecules by the addition of water
What bases correspond to RNA?
AUGC
What are enzymes?
catalysts that lower the activation energy; speed up the rate of
reactions
Entropy is a measure of:
disorder (favorable)
Which is true regarding coupled reactions?
A) need 2 or more steps in reaction mechanism
B) none are true
C) the overall delta G is exergonic
D) they typically have intermediates
E) all are true
all are true
Raising the pH will cause what to occur on the oxygen affinity
plot of Hb?
, A) a shift from sigmoidal curve to hyperbolic curve
B) a shift to the left of the sigmoidal curve
C) an increase in the oxygen affinity
D) a shift to the right of the sigmoidal curve
a shift to the left of the sigmoidal curve
Which of the following favors the formation of products in a
reaction?
A) none
B) Keq= 1, Delta G = 0
C) Keq < 1, Delta G > 0
D) Keq > 1, Delta G > 0
E) Keq > 1, Delta G < 0
Keq > 1, Delta G < 0
What type of secondary structure does collagen have?
a-helices
Which of the following is true regarding pKa?
A) a high Ka will indicate a high pKa
B) the pKa = the isolectric point
C) higher pKa's are more acidic than lower pKa's
D) lower pKa's are more acidic than higher pKa's
E) pKa = pH
lower pKa's are more acidic than higher pKa's
