1. An anabolic reaction usually
A) yields energy.
B) requires energy.
C) involves no change in energy.
D) is degradative, regardless of energy change.
E) decreases molecular order
2.____ Oxidation reactions in biological systems generally involve
A) addition of electrons and hydrogen ions.
B) loss of electrons and hydrogen ions.
C) addition of electrons and loss of hydrogen ions.
D) loss of electrons and addition of hydrogen ions.
E) loss of electrons and either addition or loss of hydrogen ions.
3. Which of the following glycolytic enzymes associates with mitochondria to coordinate glycolysis and respiration?
A) hexokinase
B) aldolase
C) phosphoglycerokinase
D) pyruvate kinase
E) None of the above are correct.
4. During glycolysis, aldolase catalyzes the breakdown of fructose-1, 6 bisphosphate to produce
A) phosphoenolpyruvate.
B) dihydroxyacetone phosphate.
C) fructose-6-phosphate.
D) A and B.
E) B and C.
5. Aldolase breaks down fructose-1,6-bisphosphate into two trioses that are
A) identical.
B) each doubly phosphorylated.
C) identical and each doubly phosphorylated.
D) different and each doubly phosphorylated.
E) different and each singly phosphorylated
6. Although pyruvate is the end product of glycolysis and no more ATP is generated by fermentation of pyruvate to ethanol, yeast produce ethanol under anaerobic conditions because
A) pyruvate export requires more energy than ethanol export.
B) electrons (and protons) are then added to ethanol to make lactate.
C) transfer of electrons from NADH to pyruvate to make ethanol regenerates NAD+, which is necessary for new rounds of glycolysis to proceed.
D) glycolysis substrate-level phosphorylation changes pyruvate to ethanol.
E) pyruvate to ethanol fermentation decreases deleterious CO2 levels.
7. Which of the following is not a product of fermentation?
A) lactate
B) CO2
C) ethanol
D) NAD+
E) glycogen