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