MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Bioenergetics and Metabolism knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The number of moleculespresent in this solution is |
| A. | 40.15 10 |
| B. | 6.023 10 |
| C. | 4.015 10 |
| D. | 0.08 10 |
| E. | All to Marks |
| Answer» F. | |
| 2. |
The free energy change for the transport of two K+ into the cell is |
| A. | +8.0 kJ/mol |
| B. | +11.6 kJ/mol |
| C. | +19.6 kJ/mol |
| D. | +31.2 kJ/mol |
| Answer» E. | |
| 3. |
Match the compounds in Group I with the correct entries in Group II. Group IGroup IIP. Cyanide1. K' ionophoreQ. Antimycin A2. Electron transfer from cytochrome b to cytochrome c1R. Valinomycin3. F1 subunit of ATP synthaseS. Aurovertin4. Cytochrome oxidase5. Adenine nucleotide trans-locase |
| A. | P-5, Q-2, R-3, S-1 |
| B. | P-5, Q-2, R-1, S-3 |
| C. | P-4, Q-2, R-1, S-3 |
| D. | P-4, Q-5, R-3, S-1 |
| Answer» D. P-4, Q-5, R-3, S-1 | |
| 4. |
The equilibrium potential of a biological membrane for Na+ is 55 mV at 37 C. Concentration of Na+ inside the cell is 20 mM. Assuming the membrane is permeable to Na+ only, the Na+ concentration outside the membrane will be _________ mM. (Faraday constant: 23062 cal.V 1.mol 1, Gas constant: 1.98 cal.mol 1.K 1) |
| A. | 147.0 : 170.0 |
| B. | 150.0 180.0 |
| C. | 210.0 : 230.0 |
| D. | 410.0 : 450.0 |
| Answer» B. 150.0 180.0 | |
| 5. |
The free energy change for the transport of three Na+ out of the cell is |
| A. | + 1.5 kJ/mol |
| B. | + 17.4 kJ/mol |
| C. | + 18.9 kJ/mol |
| D. | + 36.3 kJ/mol |
| Answer» E. | |
| 6. |
Match the entries in Group I with the enzymes in Group II. Group IGroup IIP. NAD+1. Glutathione peroxidaseQ. Selenium2. NitrogenaseR. Pyridoxal3. Lactate dehydrogenase phosphateS. Molybdenum4. Glycogen phosphorylase |
| A. | P-3, Q-2, R-4, S-1 |
| B. | P-4, Q-1, R-3, S-2 |
| C. | P-3, Q-1, R-4, S-2 |
| D. | P-3, Q-4, R-2, S-1 |
| Answer» D. P-3, Q-4, R-2, S-1 | |
| 7. |
Match the following photoreceptors with their prosthetic groups and spectral specificity Photoreceptor Moiety that absorbs lightP. Phototropin 1. ChromobilinQ. Cryptochrome 2. FAD R. Phytochrome 3. FMNAbsorption (nm) A. 400-500 B. 600-800 C. 500-600P Q R |
| A. | 3-A 1-A 1-B |
| B. | 1-B, 1-A 3-B |
| C. | 3-A 1-A 1-C |
| D. | 2-C 1-C 1-A |
| Answer» B. 1-B, 1-A 3-B | |
| 8. |
During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1, 5 - bisphosphate to yield |
| A. | one molecule each of 3-phosp-hoglycerate and 2-phosphoglycolate |
| B. | two molecules of 3-phosphoglycerate |
| C. | two molecules of 2-phosphoglycolate |
| D. | one molecule each of 3-phosp- hoglycerate and glyoxylate |
| Answer» B. two molecules of 3-phosphoglycerate | |
| 9. |
The ?G for the oxidation of NADH by FAD is |
| A. | 9.25 kJ mol |
| B. | |
| C. | 103.04 kJ mol |
| D. | + 51.52 kJ mol |
| E. | 18.5 kJ mol |
| Answer» E. 18.5 kJ mol | |
| 10. |
Oxidation reduction reactions with positive standard redox potential (?E0) have |
| A. | positive ?G |
| B. | negative ?G |
| C. | positive ?E |
| D. | negative ?E |
| Answer» C. positive ?E | |
| 11. |
The value of ?G', given Keq as 1.7, at 23 C will be |
| A. | 17.19 kJ mol |
| B. | 19.8 kJ mol |
| C. | + 52.82 kJ mol |
| D. | |
| E. | 117.07 kJ mol |
| Answer» B. 19.8 kJ mol | |
| 12. |
The maximum reaction velocity (Vm) for an enzyme catalyzed reaction was experimentally measured at two different temperatures and following results obtained : Temperature, C 27 37 Vm mmol m 3 2.25 4.50The energy of activation for the reaction is |
| A. | 12834 cal mol |
| B. | 25668 cal mol |
| C. | 6417 cal mol |
| D. | |
| E. | 19251 cal mol |
| Answer» B. 25668 cal mol | |
| 13. |
The respiratory coefficient for the reaction aCHmOn + bO2 + cNH3 ? dCHaO N?+ eH2O + CO2 is defined as |
| A. | /a |
| B. | e/b |
| C. | b/ |
| D. | /b |
| Answer» E. | |
| 14. |
The standard free energy change (?G' ) for ATP hydrolysis is 30 kJ.mole 1. The in vivo concentrations of ATP, ADP and Pi in E. coli are 7.90, 1.04 and 7.90 mM, respectively. When E. coli cells are cultured at 37 C, the free energy change (?G) for ATP hydrolysis in vivo is ______ kJ. mole 1. |
| A. | - 48 to - 80 |
| B. | - 88 to - 80 |
| C. | - 48 to - 46 |
| D. | - 55 to - 44 |
| Answer» D. - 55 to - 44 | |
| 15. |
Match items in group 1 with correct examples from those in group 2 Group 1Group 2P. Catabolic product1. GriseofulvinQ. Bioconversion2. Bakers yeastR. Biosynthetic product3. 6-Aminopenici- llanic acidS. Cell mass4. Ethanol |
| A. | P-4, Q-3, R-2, S-l |
| B. | P-3, Q-4, R-l, S-2 |
| C. | P-4, Q-3, R-l, S-2 |
| D. | P-l, Q-4, R-3, S-2 |
| Answer» D. P-l, Q-4, R-3, S-2 | |
| 16. |
Match the compounds in Group I with the correct entries in Group II. |
| A. | P-5, Q-2, R-3, S-1 |
| B. | P-5, Q-2, R-1, S-3 |
| C. | P-4, Q-2, R-1, S-3 |
| D. | P-4, Q-5, R-3, S-1 |
| Answer» D. P-4, Q-5, R-3, S-1 | |
| 17. |
The equilibrium potential of a biological membrane for Na |
| A. | 147.0 : 170.0 |
| B. | 150.0 180.0 |
| C. | 210.0 : 230.0 |
| D. | 410.0 : 450.0 |
| Answer» B. 150.0 180.0 | |
| 18. |
The free energy change for the transport of three Na |
| A. | + 1.5 kJ/mol |
| B. | + 17.4 kJ/mol |
| C. | + 18.9 kJ/mol |
| D. | + 36.3 kJ/mol |
| Answer» E. | |
| 19. |
During photorespiration under low CO |
| A. | one molecule each of 3-phosp-hoglycerate and 2-phosphoglycolate |
| B. | two molecules of 3-phosphoglycerate |
| C. | two molecules of 2-phosphoglycolate |
| D. | one molecule each of 3-phosp- hoglycerate and glyoxylate |
| Answer» B. two molecules of 3-phosphoglycerate | |
| 20. |
Calculate the molarity ( M) of the resulting solution. |
| A. | 66.6 |
| B. | 6.6 |
| C. | 0.67 |
| D. | 0.067 |
| Answer» B. 6.6 | |
| 21. |
Match the entries in Group I with the enzymes in Group II. |
| A. | P-3, Q-2, R-4, S-1 |
| B. | P-4, Q-1, R-3, S-2 |
| C. | P-3, Q-1, R-4, S-2 |
| D. | P-3, Q-4, R-2, S-1 |
| Answer» D. P-3, Q-4, R-2, S-1 | |
| 22. |
The most plausible explanation for a sudden increase of the respiratory quotient (RQ) of a microbial culture is that |
| A. | cells are dying |
| B. | yield of biomass is increasing |
| C. | the fermentation rate is increasing relative to respiration rate |
| D. | the maintenance rate is decreasing |
| Answer» D. the maintenance rate is decreasing | |
| 23. |
Match the following photoreceptors with their prosthetic groups and spectral specificity |
| A. | 3-A 1-A 1-B |
| B. | 1-B, 1-A 3-B |
| C. | 3-A 1-A 1-C |
| D. | 2-C 1-C 1-A |
| Answer» B. 1-B, 1-A 3-B | |
| 24. |
The product(s) resulting from the hydrolysis of maltose is/are |
| A. | a mixture of a-D-Glucose and -D-Glucose |
| B. | a mixture of D-Glucose and L-Glucose |
| C. | a-D-Glucose only |
| D. | -D-Glucose only |
| Answer» B. a mixture of D-Glucose and L-Glucose | |
| 25. |
In N-linked glycosylation, the oligosaccharide chain is attached to protein by |
| A. | asparagine |
| B. | arginine |
| C. | serine |
| D. | threonine |
| Answer» B. arginine | |
| 26. |
An alternative to glycolysis pathway is |
| A. | glyoxylate pathway |
| B. | pentose phosphate pathway |
| C. | citric acid cycle |
| D. | gluconeogenesis |
| Answer» C. citric acid cycle | |
| 27. |
The free energy change for the transport of two K |
| A. | +8.0 kJ/mol |
| B. | +11.6 kJ/mol |
| C. | +19.6 kJ/mol |
| D. | +31.2 kJ/mol |
| Answer» E. | |
| 28. |
The standard free energy change (?G' ) for ATP hydrolysis is 30 kJ.mole |
| A. | - 48 to - 80 |
| B. | - 88 to - 80 |
| C. | - 48 to - 46 |
| D. | - 55 to - 44 |
| Answer» D. - 55 to - 44 | |
| 29. |
Oxidation reduction reactions with positive standard redox potential (?E |
| A. | positive ?G |
| B. | negative ?G |
| C. | positive ?E |
| D. | negative ?E |
| Answer» C. positive ?E | |
| 30. |
During lactic acid fermentation, net yield of ATP and NADH per mole of glucose is |
| A. | 2 ATP and 2 NADH |
| B. | 2 ATP and 0 NADH |
| C. | 4 ATP and 2 NADH |
| D. | 4 ATP and 0 NADH |
| Answer» C. 4 ATP and 2 NADH | |
| 31. |
The reactions leading to the formation of amino acids from the TCA cycle intermediates are |
| A. | carboxylation |
| B. | isomerization |
| C. | transamination |
| D. | decarboxylation |
| Answer» D. decarboxylation | |
| 32. |
A protein binds to phosphocellulose column at pH 7.0 and elutes at pH 8.0. If the protein has to be further purified on a DEAE Sephacel column, the binding buffer should have a pH of |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 8 |
| Answer» D. 8 | |
| 33. |
Energy capture efficiency of the aerobic cells using glucose as a substrate is |
| A. | 50% |
| B. | 40% |
| C. | 30% |
| D. | 20% |
| Answer» D. 20% | |
| 34. |
The respiratory coefficient for the reaction |
| A. | /a |
| B. | e/b |
| C. | b/ |
| D. | /b |
| Answer» E. | |
| 35. |
28. What product will result from complete hydrolysis of soluble dextran ? |
| A. | Sucrose only |
| B. | Fructose only |
| C. | Glucose and fructose only |
| D. | Glucose only |
| Answer» E. | |
| 36. |
Match items in group 1 with correct examples from those in group 2 |
| A. | P-4, Q-3, R-2, S-l |
| B. | P-3, Q-4, R-l, S-2 |
| C. | P-4, Q-3, R-l, S-2 |
| D. | P-l, Q-4, R-3, S-2 |
| Answer» D. P-l, Q-4, R-3, S-2 | |