MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is true about ribonucease? |
| A. | Native state which is catalytically inactive is denatured |
| B. | Unfolded state is inactive |
| C. | Renatured ribonuclease is inactive |
| D. | Renaturation involves reestablishment of the correct disulfide cross links |
| Answer» B. Unfolded state is inactive | |
| 2. |
Protein A will fold into its native state only when protein B is also present in the solution. However, protein B can fold itself into native confirmation without the presence of protein A. Which of the following is true? |
| A. | Protein B serves as precursor for protein A |
| B. | Protein B serves as molecular chaperon for protein A |
| C. | Protein B serves as ligand for protein A |
| D. | Protein B serves as structural motif for protein A |
| Answer» C. Protein B serves as ligand for protein A | |
| 3. |
Process of folding does not depend on ____________ |
| A. | Concentration of salts |
| B. | pH |
| C. | Solute |
| D. | Solvent |
| Answer» D. Solvent | |
| 4. |
A process by which a protein structure assumes its functional shape or conformation is? |
| A. | Denaturing |
| B. | Folding |
| C. | Synthesis |
| D. | Hydrolysis |
| Answer» C. Synthesis | |
| 5. |
WHICH_OF_THE_FOLLOWING_IS_TRUE_ABOUT_RIBONUCEASE??$ |
| A. | Native state which is catalytically inactive is denatured |
| B. | Unfolded state is inactive |
| C. | Renatured ribonuclease is inactive |
| D. | Renaturation involves reestablishment of the correct disulfide cross links |
| Answer» B. Unfolded state is inactive | |
| 6. |
PROTEIN_A_WILL_FOLD_INTO_ITS_NATIVE_STATE_ONLY_WHEN_PROTEIN_B_IS_ALSO_PRESENT_IN_THE_SOLUTION._HOWEVER_PROTEIN_B_CAN_FOLD_ITSELF_INTO_NATIVE_CONFIRMATION_WITHOUT_THE_PRESENCE_OF_PROTEIN_A._WHICH_OF_THE_FOLLOWING_IS_TRUE??$ |
| A. | Protein B serves as precursor for protein A |
| B. | Protein B serves as molecular chaperon for protein A |
| C. | Protein B serves as ligand for protein A |
| D. | Protein B serves as structural motif for protein A |
| Answer» C. Protein B serves as ligand for protein A | |
| 7. |
Which of the following about spontaneous folding is false? |
| A. | It involves initial formation of highly compact structure |
| B. | It involves initial formation of a local secondary structure |
| C. | It is essentially a random process |
| D. | It may be defective in some human diseases |
| Answer» D. It may be defective in some human diseases | |
| 8. |
Which of the following are chaperons in E.coli? |
| A. | Hsp70 |
| B. | Hsp40 |
| C. | DnaA |
| D. | DnaK and DnaJ |
| Answer» E. | |
| 9. |
As folding progresses which of the following does not take place? |
| A. | Entropy decreases |
| B. | Amount of protein in native state increases |
| C. | Free energy increases |
| D. | Amount of protein in native state decreases |
| Answer» E. | |
| 10. |
Which of the following is a function of chaperone protein? |
| A. | It degrades proteins that have folded improperly |
| B. | It provide a template for how the proteins should fold |
| C. | It rescues proteins that have folded improperly and allows them to refold properly |
| D. | It degrades proteins that have folded properly |
| Answer» D. It degrades proteins that have folded properly | |
| 11. |
Which of the following cannot denature a protein? |
| A. | Iodoacetic acid |
| B. | SDS detergent |
| C. | Urea |
| D. | Heating to 90°C |
| Answer» B. SDS detergent | |
| 12. |
Process of folding does not depend on |
| A. | Concentration of salts |
| B. | pH |
| C. | Solute |
| D. | Solvent |
| Answer» D. Solvent | |
| 13. |
A process by which a protein structure assumes its functional shape or conformation is |
| A. | Denaturing |
| B. | Folding |
| C. | Synthesis |
| D. | Hydrolysis |
| Answer» C. Synthesis | |
| 14. |
Which of the following forces is favorable for protein folding? |
| A. | Hydrophobic interactions |
| B. | Hydrogen bonding |
| C. | Vander Waals forces |
| D. | Ionic bonding |
| Answer» B. Hydrogen bonding | |