Primary Structure of Protein MCQ

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

• A polypeptide chain contains two terminals – one carboxyl-terminal (C terminal) and the other amino-terminal (N terminal). Which of the following is true?
  ক

  N terminal is synthesized last during translation

  খ

  C terminal is synthesized first during translation

  গ

  N terminal is represented on the right side and C terminal on the left side

  ঘ

  N terminal is represented on the left side and C terminal on the right side
• A protein molecule contains amino acid residues and not amino acids because when a peptide bond is formed _________ is lost.
  ক

  nitrogen molecule

  খ

  hydrogen molecule

  গ

  oxygen molecule

  ঘ

  water molecule
• The primary structure of a protein is held together by non-covalent interactions such as peptide bonds, made during transcription.
  ক

  True

  খ

  False
• Which of the following is related to the primary structure of proteins?
  ক

  Alpha helix

  খ

  Beta-sheets

  গ

  Loops

  ঘ

  Amino acid sequence
• ______________ is used for sequencing of peptides.
  ক

  X-ray crystallography

  খ

  Spectrophotometry

  গ

  NMR spectroscopy

  ঘ

  Mass spectrometry
• Cyanogen bromide (CNBr) cleaves the peptide bond on the ‘C’ terminal side of the _______ residues.
  ক

  Trp

  খ

  Ser

  গ

  Ala

  ঘ

  Met
• Trypsin cleaves peptide bonds on the ‘c’ terminal side of the positively charged residues Arg and Lys, if the next residues is not _____
  ক

  His

  খ

  Gly

  গ

  Ala

  ঘ

  Pro
• __________ is used as a reducing agent in SDS PAGE.
  ক

  Sodium dodecyl sulfate (SDS)

  খ

  Ammonium persulphate (APS)

  গ

  Bisacrylamide

  ঘ

  2-mercaptoethanol
• The polyacrylamide gel electrophoresis (PAGE) of proteins is based on the following properties of proteins.
  ক

  Size and charge only

  খ

  Size and shape only

  গ

  Electric charge only

  ঘ

  Size, shape and electric charge
• In metal chelate affinity chromatography, divalent cations such as Zn+2 or Ni+2 is attached on the electrophoretic matrix and it binds to ___________
  ক

  Trp tag

  খ

  Ala tag

  গ

  Gly tag

  ঘ

  His tag
• The minimum number of residues that appear to be necessary for a polypeptide to fold into a discrete and stable shape that allows it to carry out a function is near 40.
  ক

  False

  খ

  True
• For a protein with 100 amino acids, how many possible sequences are there?
  ক

  (100)20

  খ

  (2)100

  গ

  (100)2

  ঘ

  (20)100
• Which of the following represents the two-dimensional structure of proteins?
  ক

  Quaternary

  খ

  Tertiary

  গ

  Secondary

  ঘ

  Primary
• Which of the following interactions is crucial for the primary structure of proteins?
  ক

  Hydrogen bond

  খ

  Di-sulfide bond

  গ

  Vander Waals interactions

  ঘ

  Peptide bond
• The structure formed by joining the amino acids by a peptide bond is called ________ structure of a protein.
  ক

  quaternary

  খ

  tertiary

  গ

  secondary

  ঘ

  primary