MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Reactions that have positive standard free energy changes (ΔG> 0) can be made to occur in cells by |
| A. | coupling them with exergonic reactions via a common intermediate |
| B. | manipulating the concentrations of products and reactants such that G/<0 |
| C. | coupling them to the hydrolysis of ATP |
| D. | all of the above |
| Answer» E. | |
| 2. |
During the unfolding reaction of a helix, breakage of each hydrogen bond requires about 2kJ/mol. This implies hydrogen bonds are |
| A. | much stronger in proteins than in water |
| B. | not reformed with water |
| C. | slightly weaker in proteins than in water |
| D. | slightly stronger in proteins than in water |
| Answer» E. | |
| 3. |
If the enthalpy change for a reaction is zero, G is equal to |
| A. | T S |
| B. | -T S |
| C. | - H |
| D. | lnK |
| E. | <sub>eq</sub> |
| Answer» C. - H | |
| 4. |
Reactions that have positive standard free energy changes ( Go> 0) can be made to occur in cells by |
| A. | coupling them with exergonic reactions via a common intermediate |
| B. | manipulating the concentrations of products and reactants such that G/<0 |
| C. | coupling them to the hydrolysis of ATP |
| D. | all of the above |
| Answer» E. | |
| 5. |
The unfolding of regular secondary structure causes |
| A. | little increase in the entropy of protein |
| B. | large decrease in the entropy of the protein |
| C. | no change in the entropy of the protein |
| D. | large increase in the entropy of the protein |
| Answer» E. | |
| 6. |
The Standard Gibb's free energy, G , is |
| A. | the residual energy present in the reactants at equilibrium |
| B. | the residual energy present in the products at equilibrium |
| C. | the difference in the residual energy of reactants and products at equilibrium |
| D. | the energy required to convert one mole of reactants to one mole of products |
| Answer» E. | |
| 7. |
If the Standard Gibb's free energy, G , for a reaction is positive then |
| A. | the products will be favored |
| B. | the reactants will be favored |
| C. | the concentration of the reactants and products will be equal |
| D. | all of the reactant will be converted to product |
| Answer» C. the concentration of the reactants and products will be equal | |