Molecular Biophysics – MCQs

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1. The primary structure of a protein is determined by:





2. The alpha-helix is stabilized mainly by:





3. The diameter of the DNA double helix is approximately:





4. The secondary structure of proteins includes:





5. Which technique is most commonly used to determine protein 3D structures?





6. Circular dichroism spectroscopy is primarily used to study:





7. In DNA, adenine pairs with:





8. The quaternary structure of a protein refers to:





9. The unit of molecular mass commonly used in biophysics is:





10. Fluorescence spectroscopy in biophysics often exploits which amino acid?





11. The B-form of DNA has how many base pairs per helical turn?





12. Which bond connects nucleotides in DNA?





13. Which technique is commonly used to study large biomolecular complexes in solution?





14. The melting temperature (Tm) of DNA refers to the point at which:





15. Which interaction primarily stabilizes beta-sheets?





16. Molecular dynamics simulations provide:





17. Protein folding is mainly driven by:





18. The backbone of proteins is composed of repeating:





19. ATP mainly stores energy in:





20. Which spectroscopy technique is most suitable for studying protein-ligand interactions in real time?





21. Ramachandran plots are used to analyze:





22. Which force stabilizes the DNA double helix?





23. The primary function of molecular chaperones is to:





24. Which method can measure the size distribution of proteins in solution?





25. The Z-form of DNA is characterized by:





26. Which type of bond forms between cysteine residues in proteins?





27. Which is an example of a molecular motor protein?





28. Enzyme-substrate interactions are often described by the:





29. The phospholipid bilayer of membranes is stabilized by:





30. Which experiment demonstrated that DNA is the genetic material?





31. Which amino acid introduces a bend in protein secondary structure due to its cyclic structure?





32. The binding of oxygen to hemoglobin is an example of:





33. Which spectroscopy is best for identifying functional groups in biomolecules?





34. Which protein structure level is most affected by denaturation?





35. The double helix model of DNA was proposed by:





36. Hydrogen bonds in proteins are typically of strength:





37. Which amino acid is achiral?





38. Which technique is used to analyze protein secondary structures like Ξ±-helix and Ξ²-sheet content?





39. In DNA, hydrogen bonds are formed between:





40. Which is a structural protein?





41. Protein denaturation usually does not break:





42. NMR spectroscopy is particularly useful for:





43. The heme group in hemoglobin binds:





44. The stacking of DNA bases contributes to stability via:





45. A typical phospholipid molecule is:





46. The hydrophobic effect is primarily driven by:





47. The stability of collagen triple helix is enhanced by:





48. The energy of hydrogen bonds in biomolecules is weaker than:





49. Cryo-electron microscopy provides:





50. DNA replication is: