Q. No.Identify the correct statements regarding the mitochondrial electron transport system.
I:
Electrons from NADH in mitochondrial matrix are first transferred to [Fe-S] and then to FMN in complex I.
II:
Complex II is not a proton pump.
III:
Cytochrome c is located on the outer surface of the inner membrane.
IV:
Ubiquinone, located within the inner mitochondrial membrane, is oxidized with the transfer of electrons to cytochrome c via complex III.
1.
Only II and III
2.
Only II, III and IV
3.
Only IV
4.
Only I and III
With respect to the steps of glycolysis at which utilization or synthesis of ATP or NADH takes place, Identify the incorrect match:
|
1. |
Production of ATP |
BPGA to 3-PGA |
|
2. |
Utilization of ATP |
Fructose-6-phosphate to Fructose-1,6-biphosphate |
|
3. |
Production of NADH |
PGAL to BPGA |
|
4. |
Utilization of NADH |
3-PGA to 2-PGA |
When oxygen is not available to a cell, NADH formed during glycolysis:
| 1. | does not undergo any change as there is no need for the cell to regenerate NAD+ |
| 2. | passes electrons to the electron transport system |
| 3. | passes hydrogen atoms to pyruvic acid |
| 4. | passes electrons and hydrogen atoms to acetyl coA |
Based on the figures given below, calculate the efficiency of the process of aerobic cellular respiration in a eukaryotic cell:
I. The total yield is 32 ATP molecules
II. Complete oxidation of a mole of glucose releases 686 kcal or energy under standard conditions.
III. Phosphorylation of ADP to form ATP stores at least 7.3 kcal per mole of ATP
| 1. | 3.5 % | 2. | 32 % |
| 3. | 34 % | 4. | 51 % |
What would be true when comparing the processes of anaerobic respiration and fermentation?
I. Both processes do not use oxygen.
II. An electron transport chain is used in anaerobic respiration but not in fermentation.
| 1. | Only I | 2. | Only II |
| 3. | Neither I nor II | 4. | Both I and II |
In aerobic cellular respiration:
1. all oxygen in water given off comes from the water used in the process
2. all oxygen in water given off comes from the glucose dismantled in the process
3. all oxygen in water given off comes from the oxygen gas acquired from the air during breathing
4. oxygen in water given off comes from both the water used in the process and the glucose dismantled in the process
In the electron transport system in the mitochondria, oxygen acts as a:
I: final acceptor of electrons
II: final acceptor of protons
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
| Assertion (A): | The maximum concentration of alcohol in beverages that are naturally fermented with yeast is about 13%. |
| Reason (R): | In alcohol fermentation, yeast converts pyruvic acid to ethanol and carbon dioxide. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| Assertion (A): | The respiratory pathway is an amphibolic pathway. |
| Reason (R): | The respiratory pathway is involved in both anabolism and catabolism. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
C77H112N2O22S + 77O2 → 63 CO2 + 38 H2O + SO2 + 9 CO(NH2)2
| 1. | 0.70 | 2. | 0.82 |
| 3. | 0.90 | 4. | 1.00 |
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