Question

As with the reaction above, an anabolic precursor (in this case acetyl-CoA) is carboxylated and ATP is converted into ADP and Pi: Acetyl-CoA H?C- S-COA + HCO?? + ATP C-CH? + ADP + Pi S-COA Malonyl-CoA A) A new carbon-carbon bond is formed in this reaction. Where is that bond relative to the carbonyl of acetyl-CoA? OA) ? OB) ? OC) ? OD) None of the above B) During the reaction, which carbon acts as a relatively stable carbanion? OA) The bicarbonate ($HCO_3^-$) carbon OB) The carbon that is ? to the acetyl-CoA carbonyl OC) The acetyl-CoA carbonyl OD) None of these C) The $\Delta G'^\circ$ of the reaction is -19.6 kJ/mol. If this reaction was uncoupled from the conversion of ATP into ADP and Pi, what would be the approximate $\Delta G'^\circ$? OA) 19.6 kJ/mol OB) 10.9 kJ/mol OC) -19.6 kJ/mol OD) 50.1 kJ/mol D) Fill in the blanks using the words exergonic, endergonic, or equilibrium. Under standard biochemical conditions, the reaction above couples the carboxylation of acetyl-CoA to the conversion of ATP into ADP and Pi, yielding a reaction that is overall.

          As with the reaction above, an anabolic precursor (in this case acetyl-CoA) is
carboxylated and ATP is converted into ADP and Pi:
Acetyl-CoA
H?C-
S-COA
+
HCO?? + ATP
C-CH?
+
ADP + Pi
S-COA
Malonyl-CoA
A) A new carbon-carbon bond is formed in this reaction. Where is that bond relative
to the carbonyl of acetyl-CoA?
OA) ?
OB) ?
OC) ?
OD) None of the above
B) During the reaction, which carbon acts as a relatively stable carbanion?
OA) The bicarbonate ($HCO_3^-$) carbon
OB) The carbon that is ? to the acetyl-CoA carbonyl
OC) The acetyl-CoA carbonyl
OD) None of these
C) The $\Delta G'^\circ$ of the reaction is -19.6 kJ/mol. If this reaction was uncoupled from the
conversion of ATP into ADP and Pi, what would be the approximate $\Delta G'^\circ$?
OA) 19.6 kJ/mol
OB) 10.9 kJ/mol
OC) -19.6 kJ/mol
OD) 50.1 kJ/mol
D) Fill in the blanks using the words exergonic, endergonic, or equilibrium.
Under standard biochemical conditions, the reaction above couples the
carboxylation of acetyl-CoA to the
conversion of ATP into ADP and Pi, yielding a reaction that is
overall.

As with the reaction above, an anabolic precursor (in this case acetyl-CoA) is
carboxylated and ATP is converted into ADP and Pi:
Acetyl-CoA
H?C-
S-COA
+
HCO?? + ATP
C-CH?
+
ADP + Pi
S-COA
Malonyl-CoA
A) A new carbon-carbon bond is formed in this reaction. Where is that bond relative
to the carbonyl of acetyl-CoA?
OA) ?
OB) ?
OC) ?
OD) None of the above
B) During the reaction, which carbon acts as a relatively stable carbanion?
OA) The bicarbonate (HCO3^-) carbon
OB) The carbon that is ? to the acetyl-CoA carbonyl
OC) The acetyl-CoA carbonyl
OD) None of these
C) The Δ G'^∘ of the reaction is -19.6 kJ/mol. If this reaction was uncoupled from the
conversion of ATP into ADP and Pi, what would be the approximate Δ G'^∘?
OA) 19.6 kJ/mol
OB) 10.9 kJ/mol
OC) -19.6 kJ/mol
OD) 50.1 kJ/mol
D) Fill in the blanks using the words exergonic, endergonic, or equilibrium.
Under standard biochemical conditions, the reaction above couples the
carboxylation of acetyl-CoA to the
conversion of ATP into ADP and Pi, yielding a reaction that is
overall.

Added by Celia R.

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