MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Coupling causes the peaks in H NMR spectra to be split into |
| A. | two peaks |
| B. | multiple peaks equal to the number of hydrogens on surrounding atoms |
| C. | multiple peaks equal to the number of surrounding carbon atoms |
| D. | multiple peaks equal to the number of hydrogen on surrounding atoms, plus one |
| Answer» E. | |
| 2. |
All hydrogen atoms |
| A. | have the same resonance frequency |
| B. | resonate at different frequencies depending on their environment. |
| C. | are attached to carbon |
| D. | resonate at about the same frequency as carbon |
| Answer» C. are attached to carbon | |
| 3. |
Why is it important to use a deuterated solvent? |
| A. | NMR uses least of this solvent |
| B. | So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition |
| C. | Expensive solvents work best with NMR |
| D. | They dissolve polymer the fastest |
| Answer» C. Expensive solvents work best with NMR | |
| 4. |
What is shielding in NMR? |
| A. | Using a curved piece of metal to block an opponents attack |
| B. | Putting metal around an Rf source |
| C. | When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei |
| D. | Blocking parts of a molecule from Rf radiation |
| Answer» D. Blocking parts of a molecule from Rf radiation | |
| 5. |
What is used to cool the superconducting coil? |
| A. | Hydrogen |
| B. | Ice |
| C. | Dry ice |
| D. | Liquid helium |
| Answer» E. | |
| 6. |
Coupling causes the peaks in 1H NMR spectra to be split into |
| A. | two peaks |
| B. | multiple peaks equal to the number of hydrogens on surrounding atoms |
| C. | multiple peaks equal to the number of surrounding carbon atoms |
| D. | multiple peaks equal to the number of hydrogen on surrounding atoms, plus one |
| Answer» E. | |
| 7. |
When placed in a magnetic field, all the random spins of the nuclei |
| A. | stop |
| B. | reverse direction |
| C. | align with the magnetic field |
| D. | rotate to 90 away from the induced field |
| Answer» D. rotate to 90 away from the induced field | |
| 8. |
Better understanding of the nuclei is possible, |
| A. | with the help of wavelength spectrum |
| B. | with the help of frequencies ranges |
| C. | with the help of a mathematical translator called the fourier transfer algorithm |
| D. | none of the above |
| Answer» D. none of the above | |