A) Symmetrical B) Right-handed C) Left-handed D) Ambidextrous
A) 4.0 B) 3.0 C) 5.4 D) 3.6
A) 5.4 Å B) 3.6 Å C) 1.0 Å D) 0.15 nm E) 1.5 Å
A) 10.0 Å B) 5.4 Å C) 3.6 Å D) 1.5 Å
A) C-alpha group B) R-group C) N-H group D) C=O group
A) i + 2 → i B) i + 5 → i C) i + 4 → i D) i + 3 → i
A) 10 B) 13 C) 3 D) 16
A) DSSP B) ClustalW C) FASTA D) BLAST
A) i + 2 → i B) i + 3 → i C) i + 5 → i D) i + 4 → i
A) i + 4 → i B) i + 5 → i C) i + 3 → i D) i + 6 → i
A) -75° B) -60° C) -105° D) -130°
A) On the inside B) Within the hydrogen-bonded core C) Aligned with the helical axis D) On the outside
A) Proline B) Leucine C) Alanine D) Glycine
A) The vertical distance between turns B) The rotation angle per residue C) The branching of hydrogen bonds D) Side-chains pointing downward toward the N-terminus
A) (-60°, -45°) B) (-90°, -15°) C) (-70°, -35°) D) (-105°, -105°)
A) A cluster of carbohydrate chains B) A sequence of amino acids twisted into a coil C) A straight line of proteins D) A complex fold in tertiary structure
A) Alpha helix B) Random coil C) Beta turn D) Beta strand
A) Quaternary complex B) Local structure C) Hydrophobic core D) Tertiary folding
A) Covalent bond B) Ionic bond C) Hydrogen bond D) Disulfide bond
A) Robert Corey B) William Astbury C) Herman Branson D) Linus Pauling
A) Beta-form B) Delta-form C) Alpha-form D) Gamma-form
A) The denatured protein B) The unstretched coiled helix C) The stretched flat sheet D) The cross-linked globule
A) 1960 B) 1930 C) 1951 D) 1948
A) X-ray fiber diffraction of hair B) Electron microscopy C) Crystal structure of myoglobin D) Nuclear magnetic resonance
A) Hans Neurath B) Linus Pauling C) Maurice Huggins D) H. S. Taylor
A) They are planar B) They are circular C) They are ionized D) They are flexible
A) He ran a complex computer simulation B) He performed a laboratory experiment with wool C) He folded a paper strip into a helix while in bed with a cold D) He analyzed myoglobin crystals
A) The development of X-ray crystallography B) The invention of the electron microscope C) Research into the nature of the chemical bond and structure of complex substances D) The discovery of DNA replication
A) About four B) Over forty C) About ten D) Exactly twenty
A) They are too hydrophobic B) They lack hydrogen atoms C) Entropic cost is not compensated by stabilizing interactions D) They have too many crosslinks
A) Pure water B) Benzene C) Acetone D) Trifluoroethanol
A) By entropically destabilizing the unfolded state B) By changing the amino acid sequence C) By attracting more water molecules D) By increasing the temperature
A) Beta-strands B) They are equally robust C) Random coils D) Alpha-helices
A) AlphaFold B) PyMOL C) Heliquest D) NetWheels
A) helixvis B) Heliquest C) NetWheels D) Chimera
A) Infrared spectroscopy B) X-ray crystallography C) Dielectric relaxation D) Flow birefringence
A) High-resolution mass spectroscopy B) Fluorescence quenching C) Large dipole moment D) Nuclear Overhauser effect couplings
A) Prolate or cigar-like B) Flat sheet C) Irregular globular D) Spherical
A) Sequence alignment B) Dot plot C) Helical wheel D) Ramachandran plot
A) Proline B) Alanine C) Valine D) Glycine
A) Methionine B) Arginine C) Proline D) Leucine
A) Its lack of amide hydrogen bonds B) Its steric hindrance with the backbone C) Its positive charge D) Its high conformational flexibility
A) Every third residue B) The final residue C) The middle residue D) The first residue
A) Proline B) Serine C) Glycine D) Leucine
A) Ability to donate hydrogen bonds B) Structural rigidity C) High flexibility D) Large hydrophobic sidechain
A) High conformational flexibility B) Lack of amide protons C) Low molecular weight D) Steric hindrance
A) Proline B) Arginine C) Cysteine D) Glycine |