|
| 1 | The end product of glycolysis is |
 | A) | 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 the |
| A) | cytoplasm. |
| B) | nucleus. |
| C) | lysosomes. |
| D) | mitochondrion. |
|
| 7 | The transfer of electrons from one molecule to another is termed |
| A) | 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 becomes |
| A) | 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 termed |
| A) | glycolysis. |
| B) | lipolysis. |
| C) | amination. |
| D) | deamination. |
|
| 13 | Free fatty acids can be catabolized by entering the Krebs cycle via |
| A) | acetyl-CoA. |
| B) | pyruvate. |
| C) | glyceraldehyde. |
| D) | NAD. |
|
| 14 | Amino acids can enter the Krebs cycle via |
| A) | pyruvate. |
| B) | acetyl-CoA. |
| C) | no intermediate. |
| D) | all of the above (a-c). |
|
| 15 | Reactions of the Krebs cycle occur in the mitochondrial |
| A) | matrix. |
| B) | outer membrane. |
| C) | inner membrane. |
| D) | cristae. |
|
| 16 | The Krebs cycle and glycolysis is regulated by the enzyme |
| A) | 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 |