MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The nitrogen atoms of urea produced in the urea cycle are derived from |
| A. | nitrate |
| B. | ammonia and aspartic acid |
| C. | nitrite |
| D. | ammonia |
| Answer» C. nitrite | |
| 2. |
Which of the following amino acid do not fall under the category of essential amino acid? |
| A. | Histidine |
| B. | Leucine |
| C. | Glycine |
| D. | Methionine |
| Answer» D. Methionine | |
| 3. |
Nitrate is reduced and ultimately produces N2 through a series of intermediate gaseous nitrogen oxide products is called ____________ |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» D. Nitrogen assimilation | |
| 4. |
Ammonia or ammonium is oxidized to nitrite followed by the oxidation of nitrite to nitrate is called ____________ |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» C. Denitrification | |
| 5. |
Formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds is called as ____________ |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» E. | |
| 6. |
Conversion of nitrogen to ammonia or nitrogenous compounds is termed as ____________ |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» B. Nitrification | |
| 7. |
An intermediate of the citric acid cycle that undergoes reductive amination with glutamine as nitrogen donor is ____________ |
| A. | α-ketoglutarate |
| B. | Glutamine |
| C. | NADPH |
| D. | H+ |
| Answer» B. Glutamine | |
| 8. |
The reaction of glutamate and NH4+ to yield glutamine is catalyzed by ____________ |
| A. | Uridylyltransferase |
| B. | Adenylyltransferase |
| C. | Glutamate synthase |
| D. | Glutamine synthase |
| Answer» E. | |
| 9. |
Dinitrogenase is a ____________ |
| A. | Monomer |
| B. | Dimer |
| C. | Trimer |
| D. | Tetramer |
| Answer» E. | |
| 10. |
Dinitrogenase reductase is a ____________ |
| A. | Monomer |
| B. | Dimer |
| C. | Trimer |
| D. | Tetramer |
| Answer» C. Trimer | |
| 11. |
Uridylylation and deuridylylation of PII are brought about by a single enzyme ______________ |
| A. | Uridylyltransferase |
| B. | Adenylyltransferase |
| C. | Glutamate synthase |
| D. | Dinitrogenase |
| Answer» B. Adenylyltransferase | |
| 12. |
AMMONIA_OR_AMMONIUM_IS_OXIDIZED_TO_NITRITE_FOLLOWED_BY_THE_OXIDATION_OF_NITRITE_TO_NITRATE_IS_CALLED_AS?$ |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» C. Denitrification | |
| 13. |
Nitrate_is_reduced_and_ultimately_produces_N2_through_a_series_of_intermediate_gaseous_nitrogen_oxide_products_is_called_as$ |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» D. Nitrogen assimilation | |
| 14. |
Formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds is called a? |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» E. | |
| 15. |
Conversion of nitrogen to ammonia or nitrogenous compounds is termed as |
| A. | Nitrogen fixation |
| B. | Nitrification |
| C. | Denitrification |
| D. | Nitrogen assimilation |
| Answer» B. Nitrification | |
| 16. |
Which of the following catalyzes reactions that incorporate nitrogen derived from glutamine? |
| A. | Glutamine amidotransferase |
| B. | Adenylyltransferase |
| C. | Glutamate synthase |
| D. | Glutamine synthase |
| Answer» B. Adenylyltransferase | |
| 17. |
An intermediate of the citric acid cycle that undergoes reductive amination with glutamine as nitrogen donor is |
| A. | α-ketoglutarate |
| B. | Glutamine |
| C. | NADPH |
| D. | H<sup>+</sup> |
| Answer» B. Glutamine | |
| 18. |
The reaction of glutamate and NH4+ to yield glutamine is catalyzed by |
| A. | Uridylyltransferase |
| B. | Adenylyltransferase |
| C. | Glutamate synthase |
| D. | Glutamine synthase |
| Answer» E. | |
| 19. |
Dinitrogenase is a |
| A. | Monomer |
| B. | Dimer |
| C. | Trimer |
| D. | Tetramer |
| Answer» E. | |
| 20. |
Dinitrogenase reductase is a |
| A. | Monomer |
| B. | Dimer |
| C. | Trimer |
| D. | Tetramer |
| Answer» C. Trimer | |
| 21. |
Uridylylation and deuridylylation of PII are brought about by a single enzyme |
| A. | Uridylyltransferase |
| B. | Adenylyltransferase |
| C. | Glutamate synthase |
| D. | Dinitrogenase |
| Answer» B. Adenylyltransferase | |