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