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Indicate which one of the following statements about nucleic acids and protein structures is correct. (1) Hydrogen bonding between the bases in the major and minor grooves of DNA is […]

The following statements were made to describe a typical collagen structure. A. Collagen has a triple-helical domain structure which consists of three distinct α-chains. B. The collagen triple helix is […]

23. Following are statements on ß-turns: A. All the 20 coded amino acids have equal propensity to form ß -turns. B. Pro cannot occur in ß-turns. C. Pro-Gly sequence strongly […]

In a 30-residue peptide, the dihedral angles φ/Ψ have been determined by one or more methods. When their values are examined in the Ramachandran plot, it is (1) not possible […]

The exact backbone dihedral angles in a folded protein can be obtained by (1) deconvolution of its circular dichroism spectra obtained at different pH and temperature (2) estimating the number […]

The following are four statements on the peptides/proteins conformation: A. Glycine has a largest area of conformationally allowed space in the Ramachandran plot of Φ and Ψ B. A 20-residue […]

Given below are statements related to protein structures: A. The dihedral angles of an amino acid X in Acetyl-x- N-Methyl amide in the Ramachandran plot, occur in very small but […]

The hemagglutinin protein in influenza virus contains a long α-helix, with 53 residues. Which of the following correctly describes the attributes of this α helix? (1) The length is 75.6 […]

How many hydrogen bonds involving the backbone CO and NH can be observed in an a-helix consisting of 15 amino acid residues? (1) 10 (2) 11 (3) 12 (4) 13 […]

An α-helix in a peptide or protein is characterized by hydrogen bonds and characteristic dihedral angles. Choose the right combination. (1) Hydrogen bonding between the amide CO of residue i […]