MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Protein Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Consider four ions q1, q2, q3 and q4. q1 has a charge +3 and mass of 290 Da, q2 has a charge +2, and mass of 290 Da, q3 has a charge +3 and mass of 390 Da, and q4 has a charge +2 and mass of 390 Da. Which one of these ions has a maximum m/z ratio? |
| A. | q1 |
| B. | q2 |
| C. | q3 |
| D. | q4 |
| Answer» E. | |
| 2. |
Which of the following lasers can be used for laser radiation in MALDI? |
| A. | Infrared lasers |
| B. | Greenlight lasers |
| C. | Red light lasers |
| D. | Ultraviolet lasers |
| Answer» E. | |
| 3. |
Which of the following provides higher resolution in MALDI-TOF? |
| A. | Blocker |
| B. | Channel |
| C. | Transmitter |
| D. | Reflector |
| Answer» E. | |
| 4. |
Which of the following charge has the lowest m/z ratio?Given data: q1 has a charge +1 and mass of 800 Da,q2 has a charge +3 and mass of 3900 Da,q3 has a charge +2 and mass of 2970 Da,q4 has a charge +4 and a mass of 3480 Da. |
| A. | q4 |
| B. | q3 |
| C. | q2 |
| D. | q1 |
| Answer» E. | |
| 5. |
Which of the following is the correct equation of the time of flight? |
| A. | t=(\(\frac{m}{2q}\))0.5 x l |
| B. | t=(\(\frac{m}{2q}\))2.0 x l |
| C. | t=(\(\frac{m}{2v^{\circ}}\))2.0 x l |
| D. | t=(\(\frac{m}{2v^{\circ}q}\))0.5 x l |
| Answer» E. | |
| 6. |
Which of the following cannot be used as a MALDI matrix compound? |
| A. | α-Cyano-4-hydroxycinnamic acid |
| B. | Sinapinic acid |
| C. | 3-Hydroxypicolinic acid |
| D. | 2,3-Dihydroxybenzoic acid |
| Answer» E. | |
| 7. |
If a charge has a mass of 3 kg and it is traveling at a speed of 10 m/s in-flight tube, then what will be it’s kinetic energy? |
| A. | 300 J |
| B. | 90 J |
| C. | 100 J |
| D. | 150 J |
| Answer» E. | |
| 8. |
In TOF, ions of lower mass are accelerated to lower velocities and reach the detector last. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which of the following type of mass analyzer uses a magnetic field and cyclotron motion to trap ions? |
| A. | Quadrupole |
| B. | Orbitrap |
| C. | TOF |
| D. | Fourier transform ion cyclotron resonance |
| Answer» E. | |
| 10. |
What is the relation of time of flight with the molecular mass of the ion in the TOF mass analyzer? |
| A. | Time of flight is inversely proportional to the square root of the molecular mass of the ion |
| B. | Time of flight is inversely proportional to the molecular mass of the ion |
| C. | Time of flight is directly proportional to the molecular mass of the ion |
| D. | Time of flight is directly proportional to the square root of the molecular mass of the ion |
| Answer» E. | |
| 11. |
In the TOF analyzer, all the ions are accelerated at the same velocity. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following ionization method uses aromatic compounds and organic solvents to achieve ionization? |
| A. | ESI |
| B. | Chemical ionization |
| C. | FAB |
| D. | MALDI |
| Answer» E. | |
| 13. |
Sublimation occurs in which of the following ionization methods? |
| A. | ESI |
| B. | FAB |
| C. | Chemical Ionization |
| D. | MALDI |
| Answer» E. | |
| 14. |
Which of the following ionization technique uses a short laser pulse to achieve ionization? |
| A. | ESI |
| B. | Chemical Ionization |
| C. | FAB |
| D. | MALDI |
| Answer» E. | |
| 15. |
Which mass analyzer is most frequently used with MALDI? |
| A. | Magnetic sector |
| B. | Quadrupole |
| C. | Ion trap |
| D. | TOF |
| Answer» E. | |