MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Electron cryomicroscopy is used mainly for _______________ |
| A. | soluble proteins |
| B. | non-soluble proteins |
| C. | carbohydrates |
| D. | lipids |
| Answer» C. carbohydrates | |
| 2. |
Synchrotrons generate _____________________ |
| A. | Peptides |
| B. | X rays |
| C. | Infrared rays |
| D. | Carcinogens |
| Answer» C. Infrared rays | |
| 3. |
Which was the first protein to have its structure determined using X-ray crystallography? |
| A. | keratin |
| B. | myoglobin |
| C. | immunoglobulin |
| D. | globulin |
| Answer» C. immunoglobulin | |
| 4. |
In X-ray diffraction, the protein crystals are bombarded with ____________ |
| A. | UV rays |
| B. | X rays |
| C. | Gamma rays |
| D. | Infrared rays |
| Answer» C. Gamma rays | |
| 5. |
Which of the following techniques delivers the amino-acid sequence of a peptide? |
| A. | Tandem MS |
| B. | GC-MS |
| C. | LC-MS |
| D. | SDS-PAGE |
| Answer» B. GC-MS | |
| 6. |
Electrospray ionization is suited for proteins that are __________________ |
| A. | in matrix |
| B. | in glycerol |
| C. | in solution |
| D. | of large size |
| Answer» D. of large size | |
| 7. |
MALDI is a technique of ______________________ |
| A. | ionization |
| B. | fractionation |
| C. | proteolysis |
| D. | cell counting |
| Answer» B. fractionation | |
| 8. |
Which is the main ingredient in the sample preparation of mass spectrometry? |
| A. | papain |
| B. | pepsin |
| C. | vinculin |
| D. | trypsin |
| Answer» E. | |
| 9. |
In mass-spectrometry, proteins are separated base on their _____________________ |
| A. | i-value |
| B. | c-value |
| C. | m/z ratio |
| D. | e/m ratio |
| Answer» D. e/m ratio | |
| 10. |
For a mass spectrometric analysis, the compounds are converted into ___________________ |
| A. | gaseous ions |
| B. | soluble form |
| C. | matrix |
| D. | antibody |
| Answer» B. soluble form | |
| 11. |
Which of the following amino acid absorbs the light of 280 nm? |
| A. | tyrosine |
| B. | cysteine |
| C. | leucine |
| D. | valine |
| Answer» B. cysteine | |
| 12. |
When was the technique of two-dimensional gel electrophoresis developed? |
| A. | 1955 |
| B. | 1965 |
| C. | 1975 |
| D. | 1985 |
| Answer» D. 1985 | |
| 13. |
In gel electrophoresis, the globular proteins move slower than the fibrous proteins. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
Proteins with greater charge density move faster in the PAGE. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Which of the following is used in PAGE to prevent the mixing of the sample with running buffer? |
| A. | ethanol |
| B. | methanol |
| C. | chloroform |
| D. | sucrose |
| Answer» E. | |