1.
The end product of glycolysis isA) glucose 6-phosphate. B) pyruvate. C) fructose 6-phosphate. D) fructose 1,6-diphosphate. 2.
Which of the following occurs in the cytoplasm?A) glycolysis B) fermentation C) electron transport chain D) both a and b 3.
The end products of fermentation are __________ or _________.A) pyruvate, glucose B) pyruvate, lactic acid C) lactic acid, alcohol D) alcohol, glucose 4.
How many net ATP molecules are produced in glycolysis?A) one B) two C) three D) four 5.
The net ATP gain in glycolysis is __________ per one molecule of glucose.A) one B) two C) three D) four 6.
The final steps of aerobic respiration occurs in theA) cytoplasm. B) nucleus. C) lysosomes. D) mitochondrion. 7.
The transfer of electrons from one molecule to another is termedA) a redox reaction. B) an oxidation-reduction reaction. C) a transfer reaction. D) both a and b are correct. 8.
Fermentation regenerates __________, which is needed to drive glycolysis to ultimately obtain ATP.A) FAD B) NAD+ C) ADP D) AMP 9.
When the oxidized form of FAD is reduced, it becomesA) FADH2. B) FADH. C) NADH. D) NADH+. 10.
The Krebs cycle generates __________ NADH molecules.A) two B) four C) six D) eight 11.
The eukaryotic cell obtains a net gain of __________ ATP molecules from the breakdown of each glucose molecule.A) 2 B) 20 C) 36 D) 42 12.
When an amide group is removed from an amino acid to yield ammonia, this is termedA) glycolysis. B) lipolysis. C) amination. D) deamination. 13.
Free fatty acids can be catabolized by entering the Krebs cycle viaA) acetyl-CoA. B) pyruvate. C) glyceraldehyde. D) NAD. 14.
Amino acids can enter the Krebs cycle viaA) pyruvate. B) acetyl-CoA. C) no intermediate. D) all of the above (a-c). 15.
Reactions of the Krebs cycle occur in the mitochondrialA) matrix. B) outer membrane. C) inner membrane. D) cristae. 16.
The Krebs cycle and glycolysis is regulated by the enzymeA) glucase. B) phosphatase. C) phosphofructokinase. D) enolase. 17.
When the electrons reach the end of the electron transport chain, an oxygen molecule accepts the electrons and combines with hydrogen to generate a water molecule.A) True B) False 18.
For each pyruvate molecule that enters the Krebs cycle by way of acetyl-CoA, two CO2, one ATP, three NADH, and one FADH2 molecules form.A) True B) False 19.
Another name for the Krebs cycle is the citric acid cycle. The older name of Krebs cycle was named after its discoverer, Sir Hans Krebs.A) True B) False 20.
Oxidation of a molecule results in the gain of electrons.A) True B) False 21.
Oxidation-reduction reactions always occur together.A) True B) False 22.
The end result of the anaerobic catabolism of one glucose molecule via glycolysis is one pyruvate molecule.A) True B) False 23.
Coenzyme A is necessary for pyruvate to enter aerobic respiration.A) True B) False