Biomolecules  MCQs

MCQs of Biomolecules

Showing 111 to 120 out of 161 Questions
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111.
In electric field, the pH value at which the amino acid does not migrate towards any electrode is called_____ of amino acid.
(a) isoelectric point
(b) isotactic point
(c) optimum point
(d) isothermal point
Answer:

Option (a)

112.
Generally isoelectric point of amino acid is in the range of
(a) 4·5 to 8·3
(b) 5·5 to 6·3
(c) 2·3 to 5·5
(d) 6·3 to 9·3
Answer:

Option (c)

113.
Which amino acid from the following does not contain asymmetric carbon ?
(a) Proline
(b) Alanine
(c) Glycine
(d) Valine
Answer:

Option (c)

114.
Which statement is wrong for amino acids ?
(a) Amino acids show amphoteric nature.
(b) Solubility of amino acids is minimum at isoelectric point.
(c) Amino acids exist as dipolar ion in neutral solution.
(d) Amino acids exist as negative ion in acidic solution and positive ion in alkaline solution.
Answer:

Option (d)

115.
Isoelectric point of amphoteric ion of amino acid occur in the range of which pOH value ? (GUJCET 2010)
(a) 9·0 to 10·7
(b) 7·7 to 8·5
(c) 2·5 to 5·0
(d) 5·5 to 6·3
Answer:

Option (b)

116.
Which bond from the following is known as peptide linkage ?
(a) –CONH–
(b) –CO–
(c) –NH–
(d) –COO–
Answer:

Option (a)

117.
If 3 amino acids are joined by peptide bond and form a chain is called the_____ .
(a) dipeptide
(b) tripeptide
(c) oligopeptide
(d) polypeptide
Answer:

Option (b)

118.
On which side of the peptide chain C–terminal residue is written ?
(a) Right side
(b) Left side
(c) Middle of the chain
(d) On any side
Answer:

Option (a)

119.
Ala–Gly–Phe tripeptide, free – NH2 – group of which amino acid is there at the side of N–terminal residue ?
(a) Phe
(b) Gly
(c) Ala
(d) Any one of these three
Answer:

Option (c)

120.
Which protein from the following is insoluble in water ?
(a) Insulin
(b) Albumin
(c) Myosin
(d) All of the above
Answer:

Option (c)

Showing 111 to 120 out of 161 Questions
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