Download PDF
Free download in PDF Amino Acids and Proteins Objective Type Questions & 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.
(21)
Number of chiral centers in isoleucine is
(22)
An amino acid that yields acetoacetyl CoA during the catabolism of its carbon skeleton will be considered
[A]
Glycogenic
[B]
Ketogenic
[C]
Both glycogenic and ketogenic
[D]
Essential
(23)
Which among the following is both glucogenic and ketogenic?
[A]
Isoleucine
[B]
Leucine
[C]
Lysine
[D]
Histidine
(24)
Which of the following is an imino acid?
[A]
Alanine
[B]
Glycine
[C]
Proline
[D]
Serine
(25)
Which of the following is an essential amino acid?
[A]
Cysteine
[B]
Asparagine
[C]
Glutamine
[D]
Phenylalanine
(26)
Which among the following is a non-essential amino acid?
[A]
Serine
[B]
Threonine
[C]
Lysine
[D]
Histidine
(27)
Which of the following is a true statement?
[A]
Tryptophan and tyrosine are significantly more polar than phenylalanine
[B]
Leucine is commonly used as an ingredient in the buffers of SDS page
[C]
Aspartate is an essential amino acid
[D]
Lysine is a non-essential amino acid
Answer: Tryptophan and tyrosine are significantly more polar than phenylalanine
(28)
If pK1 = 2.34 and pK2 = 9.60, then the isoelectric point pI is
[A]
5.87
[B]
5.97
[C]
3.67
[D]
11.94
(29)
The two amino acids having R groups with a negative net charge at pH 7.0 are
[A]
Aspartate and glutamate
[B]
Arginine and histidine
[C]
Cysteine and methionine
[D]
Proline and valine
Answer: Aspartate and glutamate
(30)
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
31
Among the 20 standard proteins coding amino acids, which one is least occurs in proteins?
[A]
Glycine
[B]
Alanine
[C]
Tryptophan
[D]
Methionine
32
What is the molecular weight of Glycine?
[A]
75 g•mol−1
[B]
80 g•mol−1
[C]
90 g•mol−1
[D]
95 g•mol−1
33
Which of the following is not an essential amino acid?
[A]
Proline
[B]
Histidine
[C]
Leucine
[D]
Methionine
34
Histones are rich in__________.
[A]
Lysine
[B]
Arginine
[C]
Histidine
[D]
Lysine and Arginine
Answer: Lysine and Arginine
35
Which of the following is an example for a bio-plastic?
[A]
Polyaspartate
[B]
Polyglutamate
[C]
Poly-L-lysine
[D]
All of these
36
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
37
Which amino acid act as the precursor of nucleotide biosynthesis?
[A]
Aspartate
[B]
Glycine
[C]
Glutamine
[D]
All of these
38
Which of the following amino acid act as excitatory neurotransmitter?
[A]
Glutamate
[B]
Aspartate
[C]
Cysteine
[D]
All of these
Take Mock Tests