Protein Folding Quiz | Protein Folding Multiple Choice Questions(MCQs) with Answers

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Questions
1 In a living organism, strong interactions between molecules are formed by a certain type of bond. Name that?
A Hydrogen bonding
B Covalent bond
C Electrostatic interactions
D Van der Waals forces

Answer: Covalent bond
2 Mark the correct statement which depicts the correct statement of protein assay?
A To determine the amount of protein
B To characterize the function of the protein
C To determine the structure of the protein
D To determine the sequence of the protein

Answer: To determine the amount of protein
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3 Proteolytic enzyme trypsin cleaves protein at which of these specific sites?
A Carboxyl side of Alanine, Glycine
B Carboxyl side of Lysin or Arginine
C Carboxyl side of aromatic amino acid
D The amino side of aromatic amino acid

Answer: Carboxyl side of Lysin or Arginine
4 Which one of the following reagent is also known a Sanger’s reagent?
A 1-fluoro-2,4-dinitrobenzene (FDNB)
B Phenylisothiocyanate
C Cyanogen bromide
D β-mercaptoethanol

Answer: 1-fluoro-2,4-dinitrobenzene (FDNB)
5 Among all the heat shock proteins which one is known as chaperonins?
A Hsp70
B Hsp32
C Hsp60
D Hsp30

Answer: Hsp60
6 Which of these heat shock proteins prevent protein misfolding and maintain polypeptide chain in the unfolded state.
A Hsp60
B Hsp28
C Hsp70
D Hsp32

Answer: Hsp70
7 Which of the following name is given to molecular chaperones?
A Allosteric protein
B Heat shock protein
C Denaturation protein
D Ribonuclease

Answer: Heat shock protein
8 Which sentence is INCORRECT regarding molten globule state of protein?
A Hydrophobic interaction among non-polar residues
B The collapsed state
C It is less compact
D The denatured state

Answer: The denatured state
9 Which of them contains all the information required to fold the polypeptide chain in its 3-D structure?
A DNA sequences
B RNA
C Histone protein
D Amino acid sequences

Answer: Amino acid sequences
10 Protein folding is a process in which a polypeptide folds in to ___________
A 2-D structure
B Globular form
C 3-D structure
D Linear form

Answer: 3-D structure
11 The characteristic strong absorbance of 280nm of proteins is due to
A Tryptophan, tyrosine and phenylalanine can absorb at 280 nm
B Tryptophan is responsible for the absorbance
C Only Tryptophan and tyrosine can absorb at 280 nm
D All amino acids can absorb at 280nm

Answer: Tryptophan, tyrosine and phenylalanine can absorb at 280 nm
12 All the following statements are true except
A Ornithine and citrulline are uncommon aminoacids
B Ornithine is an intermediates in Urea cycle
C Ormithine and citrulline are uncommon amino acids present in many proteins
D Both ornithine and citrulline are intermediates in urea cycle

Answer: Both ornithine and citrulline are intermediates in urea cycle
13 Tri-peptide consists
A 3 amino acids and 3 peptide bonds
B 2 amino acids and 3 peptide bonds
C 3 amino acids and 2 peptide bonds
D 3 amino acids and 4 peptide bonds

Answer: 3 amino acids and 2 peptide bonds
14 Peptide bonds between amino acids are highly stable and have a half-life of seven years in intracellular condition. This is due to
A High activation energy required for hydrolysis
B Low activation energy required for hydrolysis
C Peptide bond is a covalent bond
D Peptide bond is rigid and planar

Answer: High activation energy required for hydrolysis
15 4-hydroxy proline is present in
A Collagen
B Plant cell wall
C Keratin
D Both plant cell wall and collagen

Answer: Both plant cell wall and collagen
16 The formation of cystine occurs at
A ER
B Golgi
C Cytosol
D Mitochondria

Answer: ER
17 Which of the following interaction contributes most in protein folding
A Covalent bond
B Ionic bond
C Hydrophobic interaction
D Vander walls interaction

Answer: Hydrophobic interaction
18 Which of the following aminoacid has pKa near neutrality
A Tryptophan
B Arginine
C Histidine
D Asparagine

Answer: Histidine
19 Desmosine is an unusual amino acid found in
A Myosin
B Elastin
C Troponin
D Actin

Answer: Elastin
20 How many small peptides are formed upon cleavage by trypsin if a protein has 5 lysine residues
A 4
B 5
C 6
D 7

Answer: 6

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