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Free download in PDF Amino Acids and Proteins 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)
How many amino acid residues are there in per turn of α-helix?
[A]
3.6
[B]
4.6
[C]
3.0
[D]
2.5
(2)
How is the secondary structure of a protein stabilized?
[A]
Van der wall forces
[B]
Hydrogen bonding
[C]
Covalent bond
[D]
Hydrophobic bond
(3)
What is the maximum wavelength that Tryptophan and tyrosine absorb?
[A]
280nm
[B]
260nm
[C]
257nm
[D]
230nm
(4)
In which amino acid Imidazole group, an aromatic ring found?
[A]
Lysine
[B]
Arginine
[C]
Histidine
[D]
Glutamate
(5)
Which of these are rare amino acid in a protein?
[A]
Leucine and serine
[B]
Lysine and glutamic acid
[C]
Tryptophan and methionine
[D]
Leucine and lysine
Answer: Tryptophan and methionine
(6)
Name the amino acid, which exists in two non-superimposable mirror images of each other.
[A]
Epimer
[B]
Anomer
[C]
Enantiomer
[D]
Chiral carbon
(7)
A solution of L-alanine (4.0g/50 ml of 6 N HCl) has a rotation of +1.61° in a 2dm polarimeter tube. Calculate the specific rotation of L-alanine in 6 N HCl.
[A]
+15.1°
[B]
+10.1°
[C]
+11.1°
[D]
+16.1°
(8)
Which of these are used to measure optical activity?
[A]
Polarimeter
[B]
Planometer
[C]
Psychrometer
[D]
Photometer
(9)
Which of these amino acids are not optically active?
[A]
Cysteine
[B]
Lysine
[C]
Arginine
[D]
Glycine
(10)
The general structure of all amino acids are same except for ___________
[A]
Lysine
[B]
Glycine
[C]
Proline
[D]
Alanine
(11)
Which of the following amino acid is sweet in taste?
[A]
Glycine
[B]
Alanine
[C]
Glutamic acid
[D]
None of these
(12)
Which of the following amino acid act as inhibitory neurotransmitter?
[A]
Glycine
[B]
Alanine
[C]
GABA
[D]
All of these
(13)
The amino acid commonly used as an ingredient in the buffers of SDS PAGE.
[A]
Aspartic acid
[B]
Glutamic acid
[C]
Glycine
[D]
Aspartic acid and Lysine together
(14)
Which of the following amino acid will be absent in α (alpha) helix structure of protein?
[A]
Proline
[B]
Glycine
[C]
Galine
[D]
Glutamic acid
(15)
Aminolevulinic acid, the first product in porphyrin biosynthesis in eukaryotes, is synthesized from ____ and succinyl-CoA.
[A]
Valine
[B]
Tryptophan
[C]
Methionine
[D]
Glycine
(16)
Carnosine is a dipeptide of histidine and _____.
[A]
β-histidine
[B]
β-alanine
[C]
β-lysine
[D]
α-lysine
(17)
Which of the following enzyme contain Selenocysteine?
[A]
Nitrate reductase
[B]
Catalase
[C]
Glutathione peroxidase
[D]
All of these
Answer: Glutathione peroxidase
(18)
Amino acid used in the ‘stripping’ of Western blotting experiment is:
[A]
Glycine
[B]
Alanine
[C]
Glutamic acid
[D]
Phenyl alanine
(19)
Amino acid selenocysteine is coded by_______.
[A]
UAA
[B]
UAG
[C]
UGA
[D]
AUG
(20)
Which of the following is a glucogenic amino acid?
[A]
Glycine
[B]
Proline
[C]
Alanine
[D]
All of these
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