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