Structural Biophysics – MCQs

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1. Structural biophysics primarily studies:





2. The primary structural technique that uses X-ray diffraction is:





3. NMR spectroscopy provides structural information based on:





4. The structural resolution of cryo-electron microscopy (cryo-EM) can reach:





5. Protein secondary structures are commonly identified by:





6. The α-helix structure of proteins was proposed by:





7. The β-sheet structure in proteins is stabilized by:





8. The quaternary structure of proteins refers to:





9. A Ramachandran plot provides information about:





10. In X-ray crystallography, the Bragg’s law is used to relate:





11. The unit cell in crystallography represents:





12. Cryo-EM requires samples to be:





13. Which technique provides high-resolution structural details of membrane proteins?





14. The double helix structure of DNA was discovered by:





15. Hydrogen bonds in DNA occur between:





16. Major and minor grooves are structural features of:





17. Small-angle X-ray scattering (SAXS) provides:





18. The radius of gyration (Rg) from SAXS describes:





19. Protein folding is driven primarily by:





20. The stability of protein tertiary structure is often due to:





21. Chaperone proteins assist in:





22. Circular dichroism spectra in the far-UV region are used to analyze:





23. Fluorescence resonance energy transfer (FRET) provides information on:





24. Which fluorophore is commonly used in structural biophysics?





25. A protein domain is defined as:





26. Structural motifs like helix-turn-helix are important in:





27. The α-helix is stabilized by:





28. Beta-barrel proteins are commonly found in:





29. NMR NOESY spectra provide:





30. The hydrophobic core of proteins is generally composed of:





31. Protein misfolding is associated with:





32. Cryo-EM has revolutionized structural biology mainly because:





33. In crystallography, resolution of 2 Å means:





34. Structural information from NMR is limited by:





35. Secondary structures are stabilized mainly by:





36. The collagen triple helix is stabilized by:





37. DNA denaturation can be monitored by:





38. The melting temperature (Tm) of DNA is the point where:





39. Fiber diffraction studies were used to study:





40. Electron density maps in crystallography represent:





41. Structural homology modeling is used to:





42. Synchrotron radiation is often used in:





43. Hydrogen-deuterium exchange (HDX) combined with mass spectrometry gives:





44. Single-molecule FRET (smFRET) allows measurement of:





45. A structural motif is defined as:





46. Which amino acid is often found in turns of proteins?





47. Triple helical nucleic acid structures are called:





48. G-quadruplex structures are formed by:





49. Which structural method directly measures distances between spin labels?





50. Structural biophysics combines: