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Free download in PDF Amino Acids Multiple Choice Questions & Answers for competitive exams. These short objective type questions with answers are very important for competitive exams like IIT-JEE, NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries.
(1)
Identify the amino acids containing nonpolar, aliphatic R groups
[A]
Phenylalanine, tyrosine, and tryptophan
[B]
Glycine, alanine, leucine
[C]
Lysine, arginine, histidine
[D]
Serine, threonine, cysteine
Answer: Glycine, alanine, leucine
(2)
Which of the following is an essential amino acid?
[A]
Cysteine
[B]
Asparagine
[C]
Glutamine
[D]
Phenylalanine
(3)
Which of the following amino acid is sweet in taste?
[A]
Glycine
[B]
Alanine
[C]
Glutamic acid
[D]
None of these
(4)
Which of the following amino acid will be absent in α (alpha) helix structure of protein?
[A]
Glycine
[B]
Galine
[C]
Glutamic acid
[D]
Proline
(5)
Carnosine is a dipeptide of histidine and _____.
[A]
β-histidine
[B]
β-alanine
[C]
β-lysine
[D]
α-lysine
(6)
Amino acid selenocysteine is coded by_______.
[A]
UAA
[B]
UAG
[C]
UGA
[D]
AUG
(7)
Bacteria prefer to use the codon CGA instead of AGA to code for Arginine. This is an example for _____.
[A]
Second genetic code
[B]
Nullomers
[C]
Transcriptional decoding
[D]
Allomers
(8)
Amino acids are
[A]
building blocks of carbohydrates
[B]
building blocks of nucleic acids
[C]
building blocks of lipids
[D]
building blocks of proteins
Answer: building blocks of proteins
(9)
Which of the following amino acid is a ‘α-helix terminator’
[A]
tryptophan
[B]
phenyl alnine
[C]
tyrosine
[D]
proline
(10)
Which of the following amino acid has buffering capacity
[A]
Tryptophan
[B]
Cysteine
[C]
Histidine
[D]
Arginine
(11)
The naturally occurring form of amino acid in proteins
[A]
L-amino acids only
[B]
D-amino acids only
[C]
both L and D amino acids
[D]
none of these
Answer: L-amino acids only
(12)
Sulphur containing amino acids are
[A]
Cysteine and methionine
[B]
Methionine and threonine
[C]
Cysteine and threonine
[D]
Cysteine and serine
Answer: Cysteine and methionine
(13)
Amino acids with hydroxyl groups are
[A]
Serine And Alanine
[B]
Alanine And Valine
[C]
Serine And Threonine
[D]
Valine And Isoleucine
Answer: Serine And Threonine
(14)
Absorbance at 280nm exhibited by protein is due to
[A]
Aliphatic Amino Acids
[B]
All Amino Acids
[C]
Non-Polar Amino Acids
[D]
Aromatic Amino Acids
Answer: Aromatic Amino Acids
(15)
Glycine and proline are the most abundant amino acids in the structure of-
[A]
Hemoglobin
[B]
Myoglobin
[C]
Insulin
[D]
Collagen
(16)
Some proteins contain additional amino acids that arise by modification of an amino acid already present in a peptide, examples include-
[A]
4 -hydroxy proline
[B]
5- hydroxy Lysine
[C]
Gamma Amino Butyric Acid
[D]
All of the above
(17)
Which out of the following amino acids carries a net positive charge at the physiological p H ?
[A]
Valine
[B]
Leucine
[C]
Isoleucine
[D]
None of the followings
Answer: None of the followings
(18)
All of the following amino acids are both glucogenic as well as ketogenic except
[A]
Isoleucine
[B]
Leucine
[C]
Tyrosine
[D]
Phenyl alanine
(19)
The greatest buffering capacity at physiological p H would be provided by a protein rich in which of the following amino acids?
[A]
Serine
[B]
Cysteine
[C]
Alanine
[D]
Histidine
(20)
Which out of the followings is not a fibrous protein?
[A]
Carbonic anhydrase
[B]
Collagen
[C]
Fibrinogen
[D]
Keratin
Answer: Carbonic anhydrase
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