Tag: csir previous year question

41. Which one of the following is the most appropriate statement regarding folded proteins? (1) Charged amino acid side chains are always buried. (2) Charged amino acid side chains are […]

Which one of the following is unfavorable for protein folding? (1) Hydrophobic interaction (2) van der Waals interaction (3) Conformational entropy (4) Hydrogen bonding Factors Affecting Protein Folding: Favorable and […]

The following observations are made on a 30-residue polypeptide (a) Unordered structure is observed in water but a helical conformation is observed in medium of low dielectric constant. (b)The peptide […]

Following are statements related to peptide/protein conformation. A. The circular dichroism spectra of collagen and a protein in α-helical conformation will be identical. B. The allowed region for the dihedral […]

Which statement is correct for globular proteins? (1) Always contain only α helix (2) Always contain only β sheets (3) Contains more reverse turns (4) Contains α helix, β sheets […]

Out of the statements mentioned below A. L-threonine and L-allo-threonine interact identically with plane polarized light. B. van der Waals’ interactions are always attractive. C. Poly (pro) ll-helix is not […]

35. β-α-β motif is composed of two beta strands joined by an alpha helix through connecting loops. This motif is known for (1) ligand binding (2) stereological hindrance in binding […]

Following statements are made related to protein structure A. The hydrogen bonding patterns between the CO and NH groups are n → n +3 in α-helix; n → n + […]

Phosphorylation of ADP to ATP occurs through energy metabolism, comprising oxidative phosphorylation or substrate level phosphorylation or photo- phosphorylation (in plants). ATP can also be formed from ADP through the […]

A protein has 30% alanine. If all the alanines are replaced by glycines, (1) helical content will increase. (2) ß-sheet content will increase. (3) there will be no change in […]