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. |
Which of the following is Edman reagent? |
| A. | Phenylisothiocyanate |
| B. | CF<sub>3</sub> COOH |
| C. | FDNB |
| D. | Phenylthiocarbonyl |
| Answer» B. CF<sub>3</sub> COOH | |
| 2. |
What best summarizes the MALDI method by which gas phase ions are produced for mass spectrometry? |
| A. | Sample is hit by a low energy xenon beam |
| B. | Sample is forced through a narrow capillary tube and the solvent rapidly evaporates |
| C. | Sample is embedded in a crystalline matrix and bombarded by laser beams |
| D. | Sample is heated and then bombarded by electrons |
| Answer» D. Sample is heated and then bombarded by electrons | |
| 3. |
Edman degradation is used for _________ |
| A. | Identifying N-terminal amino acids |
| B. | Identifying C-terminal amino acids |
| C. | Identifying amino acid |
| D. | Identifying carbohydrates |
| Answer» B. Identifying C-terminal amino acids | |
| 4. |
Cleaving of peptide chain is done by _________ |
| A. | Trypsin |
| B. | Tyrosine |
| C. | Tryptophan |
| D. | Arginine |
| Answer» B. Tyrosine | |
| 5. |
The amino acid sequences of thousands of different proteins from many species have been determined using principles first developed by? |
| A. | Edman |
| B. | Sanger |
| C. | Mendel |
| D. | Watson and Crick |
| Answer» C. Mendel | |
| 6. |
Which of the following is a Sanger s reagent? |
| A. | 1-fluoro-2, 4-dinitrobenzene |
| B. | 1-fluoro-2, 3-dinitrobenzene |
| C. | 1-fluoro-2, 4-trinitrobenzene |
| D. | 1-fluoro-2, 3-trinitrobenzene |
| Answer» B. 1-fluoro-2, 3-dinitrobenzene | |
| 7. |
Amino acids sequence in DNA can be determined by the order of their _________ |
| A. | rRNA |
| B. | tRNA |
| C. | Nucleotides |
| D. | mRNA |
| Answer» D. mRNA | |