9. The regions of phi, psi space occupied by well characterized protein secondary structures are marked on a Ramachandran plot as shown above. Which of the following statements is CORRECT? […]
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CSIR PYQ Biochemistry-Conformation of Proteins
Restrictions in the Ramachandran Plot
The Ramachandran plot graphically shows which combination of torsional angles phi (φ) and psi (Ψ) of amino acid residues contained in a peptide are possible. Examination of the plot below […]
CSIR PYQ Biochemistry-Conformation of Proteins
Understanding Peptides in the Ramachandran Plot
Choose the correct statement about peptides in Ramchandran plot. (1) Peptides that are unstructured will have all the backbone dihedral angles in the disallowed regions. (2) It is not possible […]
CSIR PYQ Biochemistry-Conformation of Proteins
Effect of Pyrrolidine Ring Reduction in Proline on ϕ and Ψ Angles
If the pyrollidine ring of proline is reduced to a linear to a linear form, the new amino acid will have (1) constrained ϕ than proline (2) constrained Ψ than […]
CSIR PYQ Biochemistry-Conformation of Proteins
Ramachandran Plot Quadrant for β-Strands of D-Amino Acids
The ϕ and Ψ values of a ß-strand composed of all D- amino acids will mainly occupy which quadrant in the Ramachandran plot? (1) upper left (2) upper right (3) […]
CSIR PYQ Biochemistry-Conformation of Proteins
Which Amino Acid Has Least Allowed Region in Ramachandran Map
The area of allowed regions in the Ramachandran map will be least for (1) Gly (2) L—Ala (3) L-Pro (4) α-methyl L-Valine Which Amino Acid Has the Least Allowed Region […]
CSIR PYQ Biochemistry-Conformation of Proteins
Ramachandran Plot: Understanding Glycine, L-Alanine & L-Proline
3. On a Ramachandran plot – glycine, L-Ala and L-Pro were plotted. Which statement is correct? (1) L-alanine will occupy greatest area (2) All amino acids will occupy same area […]
CSIR PYQ Biochemistry-Conformation of Proteins
Understanding Phi (ϕ) and Psi (ψ) Angles in Peptides
In the diagram for peptide shown below, angle ϕ represents bonds between (1) N – C’ (2) C’ – C (3) C – O (4) N – H […]
CSIR PYQ Biochemistry-Conformation of Proteins
Understanding the Planarity of the Peptide Bond
The peptide unit (Cα – C’O – NH – Cα) is planer due to (1) restriction around Cα – C’ bond (2) restriction around C’ – N bond (3) restriction […]
DBT BET JRF 2023 Previous Year Questions and Video solutions
Matching Precursors with Fermentation Products:
Match List I with List II LIST I (Precursor) […]
