|
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 from 1 molecule of glucose. |
| | 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 are 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 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 |
|