Protein Structure Basics MCQ

Test your knowledge with important Protein Structure Basics MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Protein Structure Basics MCQs on Bissoy. Bissoy App

• One can search a structure in PDB using the four-letter code or keywords related to its annotation.
  ক

  True

  খ

  False
• Which of the following is not correct about the NMR?
  ক

  It stands for Nuclear Magnetic Resonance

  খ

  NMR spectroscopy detects spinning patterns of atomic nuclei in a electric field

  গ

  NMR spectroscopy detects spinning patterns of atomic nuclei in a magnetic field

  ঘ

  Protein samples are labeled with radioisotopes such as 13C and 15N
• Which of the following is not correct about the X-ray Crystallography?
  ক

  In x-ray protein crystallography, proteins need to be grown into large crystals in which their positions are fixed in a repeated, ordered fashion

  খ

  The protein crystals are illuminated with an intense x-ray beam

  গ

  The x-rays are deflected by the electron clouds surrounding the atoms in the crystal producing a regular pattern of diffraction

  ঘ

  The protein crystals are illuminated with an intense infrared beam
• Which of the following is not correct about the Integral Membrane Proteins?
  ক

  Membrane proteins exist in lipid bilayers of cell membranes

  খ

  The exterior of the proteins spanning the membrane must be very hydrophobic to be stable

  গ

  The exterior of the proteins spanning the membrane must be very hydrophilic to be stable

  ঘ

  Most typical transmembrane segments are α-helices
• Globular proteins are usually insoluble.
  ক

  True

  খ

  False
• Which of the following is not correct about the β-sheet?
  ক

  A β-sheet is a fully extended configuration built up from several spatially adjacent regions of a polypeptide chain

  খ

  Each region involved in forming the β-sheet is a β-strand

  গ

  The β-strand conformation is pleated with main chain backbone zigzagging and side chains positioned on same sides of the sheet

  ঘ

  β-Strands are stabilized by hydrogen bonds between residues of adjacent strands
• Which of the following is not correct about the α-Helices?
  ক

  An α-helix has a main chain backbone conformation that resembles a corkscrew

  খ

  Nearly all known α-helices are right handed, exhibiting a leftward spiral form

  গ

  Nearly all known α-helices are right handed, exhibiting a rightward spiral form

  ঘ

  In right handed helix, there are 3.6 amino acids per helical turn
• Which of the following is not correct about the stabilizing Forces?
  ক

  Protein structures from secondary to quaternary are maintained by noncovalent forces

  খ

  They include electrostatic interactions but not van der Waals forces, and hydrogen bonding

  গ

  Electrostatic interactions are a significant stabilizing force in a protein structure

  ঘ

  Electrostatic interactions occur when excess negative charges in one region are neutralized by positive charges in another region
• A linear polymer of more than fifty amino acid residues is referred to as a ________
  ক

  dipeptide

  খ

  oligopeptide

  গ

  peptide

  ঘ

  polypeptide
• The peptide formation involves two amino acids covalently joined together between the carboxyl group of one amino acid and the amino group of another.
  ক

  True

  খ

  False
• ______ the smallest amino acid, has a hydrogen atom as the R group.
  ক

  valine

  খ

  proline

  গ

  Glycine

  ঘ

  threonine
• Within the hydrophobic set of amino acids, they can be further divided into aliphatic and aromatic.
  ক

  True

  খ

  False
• The building blocks of proteins are ______ naturally occurring amino acids, small molecules that contain a free amino group (NH2) and a free carboxyl group (COOH).
  ক

  ten

  খ

  twenty

  গ

  nine

  ঘ

  nineteen