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Free download in PDF Protein Folding Multiple Choice Questions(MCQs) & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(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
(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
(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
(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
(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
(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
(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
(19)
Desmosine is an unusual amino acid found in
[A]
Myosin
[B]
Elastin
[C]
Troponin
[D]
Actin
(20)
How many small peptides are formed upon cleavage by trypsin if a protein has 5 lysine residues
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