MCQOPTIONS
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MCQOPTIONS
This section includes 59 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Secondary structure is defined by _________ |
| A. | Hydrogen bonding |
| B. | Vander Waals forces |
| C. | Covalent bonding |
| D. | Ionic bonding |
| Answer» B. Vander Waals forces | |
| 52. |
Which of the following is false about NMR spectroscopy? |
| A. | NMR is an abbreviated form of Nuclear Magnetic Resonance |
| B. | The intramolecular magnetic field around an atom in a molecule changes the resonance frequency giving structural information about the atom |
| C. | The intermolecular magnetic field around an atom in a molecule changes the resonance frequency giving structural information about the atom |
| D. | It is a technique that exploits magnetic properties of atomic nuclei |
| Answer» D. It is a technique that exploits magnetic properties of atomic nuclei | |
| 53. |
Which of the statements is false about multiple sequence alignment? |
| A. | Both protein and nucleic acid secondary structures can be used |
| B. | More useful in RNA |
| C. | These alignments can be made more accurate by the inclusion of secondary structure information |
| D. | A significant increase in accuracy |
| Answer» C. These alignments can be made more accurate by the inclusion of secondary structure information | |
| 54. |
Which of the following is a false statement? |
| A. | α-Keratin is α helical |
| B. | Collagen is α helical |
| C. | Hemoglobin has a quaternary structure |
| D. | α-Keratin is β pleated structure |
| Answer» E. | |
| 55. |
A structure that has hydrogen bonds between polypeptide chains arranged side by side is? |
| A. | Primary structure |
| B. | α-helix |
| C. | β-pleated sheets |
| D. | Tertiary structure |
| Answer» D. Tertiary structure | |
| 56. |
Which of the following is not true about secondary protein structure? |
| A. | The hydrophilic/hydrophobic character of amino acid residues is important to secondary structure |
| B. | The ability of peptide bonds to form intramolecular hydrogen bonds is important to secondary structure |
| C. | The alpha helix, beta pleated sheet and beta turns are examples of protein secondary structure |
| D. | The steric influence of amino acid residues is important to secondary structure |
| Answer» B. The ability of peptide bonds to form intramolecular hydrogen bonds is important to secondary structure | |
| 57. |
A coiled peptide chain held in place by hydrogen bonding between peptide bonds in the same chain is? |
| A. | Primary structure |
| B. | α-helix |
| C. | β-pleated sheets |
| D. | Tertiary structure |
| Answer» C. β-pleated sheets | |
| 58. |
Which of the following does not affect the stability of an α-helix? |
| A. | Electrostatic repulsion |
| B. | Bulkiness |
| C. | Interaction between R groups spaced three residues apart |
| D. | Occurrence of alanine and glycine residues |
| Answer» E. | |
| 59. |
β-pleated sheets are the examples of _________ |
| A. | Primary structure |
| B. | Secondary structure |
| C. | Tertiary structure |
| D. | Quaternary structure |
| Answer» C. Tertiary structure | |