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1 | |
The end product of glycolysis is |
| | A) | glucose 6-phosphate. |
| | B) | pyruvate. |
| | C) | fructose 6-phosphate. |
| | D) | fructose 1,6-diphosphate. |
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2 | |
Which of the following occurs in the cytoplasm? |
| | A) | glycolysis |
| | B) | fermentation |
| | C) | electron transport chain |
| | D) | both a and b |
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3 | |
The end products of fermentation are __________ or _________. |
| | A) | pyruvate, glucose |
| | B) | pyruvate, lactic acid |
| | C) | lactic acid, alcohol |
| | D) | alcohol, glucose |
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4 | |
How many net ATP molecules are produced in glycolysis? |
| | A) | one |
| | B) | two |
| | C) | three |
| | D) | four |
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5 | |
The net ATP gain in glycolysis is __________ per one molecule of glucose. |
| | A) | one |
| | B) | two |
| | C) | three |
| | D) | four |
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6 | |
The final steps of aerobic respiration occurs in the |
| | A) | cytoplasm. |
| | B) | nucleus. |
| | C) | lysosomes. |
| | D) | mitochondrion. |
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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. |
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8 | |
Fermentation regenerates __________, which is needed to drive glycolysis to ultimately obtain ATP. |
| | A) | FAD |
| | B) | NAD+ |
| | C) | ADP |
| | D) | AMP |
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9 | |
When the oxidized form of FAD is reduced, it becomes |
| | A) | FADH2. |
| | B) | FADH. |
| | C) | NADH. |
| | D) | NADH+. |
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10 | |
The Krebs cycle generates __________ NADH molecules. |
| | A) | two |
| | B) | four |
| | C) | six |
| | D) | eight |
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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 |
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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. |
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13 | |
Free fatty acids can be catabolized by entering the Krebs cycle via |
| | A) | acetyl-CoA. |
| | B) | pyruvate. |
| | C) | glyceraldehyde. |
| | D) | NAD. |
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14 | |
Amino acids can enter the Krebs cycle via |
| | A) | pyruvate. |
| | B) | acetyl-CoA. |
| | C) | no intermediate. |
| | D) | all of the above (a-c). |
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15 | |
Reactions of the Krebs cycle occur in the mitochondrial |
| | A) | matrix. |
| | B) | outer membrane. |
| | C) | inner membrane. |
| | D) | cristae. |
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16 | |
The Krebs cycle and glycolysis is regulated by the enzyme |
| | A) | glucase. |
| | B) | phosphatase. |
| | C) | phosphofructokinase. |
| | D) | enolase. |
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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 |
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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 |
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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 |
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20 | |
Oxidation of a molecule results in the gain of electrons. |
| | A) | True |
| | B) | False |
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21 | |
Oxidation-reduction reactions always occur together. |
| | A) | True |
| | B) | False |
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22 | |
The end result of the anaerobic catabolism of one glucose molecule via glycolysis is one pyruvate molecule. |
| | A) | True |
| | B) | False |
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23 | |
Coenzyme A is necessary for pyruvate to enter aerobic respiration. |
| | A) | True |
| | B) | False |
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