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The chain structure of Lysine is shown below.

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Based on the structure, is Lysine acidic, basic, or neutral overall? Explain?

Important Questions on Biomolecules

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Chemistry>Organic Chemistry>Biomolecules>Proteins
Among the α -amino acid-threonine, tyrosine, methionine, arginine and tryptophan, those which contain an aromatic group in their side chain are
HARD
Chemistry>Organic Chemistry>Biomolecules>Proteins
The correct structure of histidine in a strongly acidic solution pH=2 is
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Chemistry>Organic Chemistry>Biomolecules>Proteins

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Chemistry>Organic Chemistry>Biomolecules>Proteins
The number of peptide bonds in the compound

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Chemistry>Organic Chemistry>Biomolecules>Proteins

The increasing order of pKa of the following amino acids in aqueous solution is

Glycine, Aspartate, Lysine, Arginine.

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Chemistry>Organic Chemistry>Biomolecules>Proteins
Among the following, the essential amino acid is:
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Which of the following tests cannot be used for identifying amino acids?
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Thiol group is present in:
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Chemistry>Organic Chemistry>Biomolecules>Proteins
In a protein molecule various amino acids are linked together by:
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Chemistry>Organic Chemistry>Biomolecules>Proteins

The correct sequence of amino acids present in the tripeptide given below is:
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Which of the following statements is not correct?
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Which one of the following statements is correct?
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Assume a spherical mammalian cell has a diameter of 27 microns. If a polypeptide chain with alpha-helical conformation has to stretch across the cell, how many amino acids should it be comprised of?
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Chemistry>Organic Chemistry>Biomolecules>Proteins
The amino acid which is basic in nature is
HARD
Chemistry>Organic Chemistry>Biomolecules>Proteins
The predominant form of histamine present in human blood is pKa, Histidine=60
MEDIUM
Chemistry>Organic Chemistry>Biomolecules>Proteins
Consider the following sequence for aspartic acid:


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The pH (Isoelectric point) of aspartic acid is:
MEDIUM
Chemistry>Organic Chemistry>Biomolecules>Proteins
Observation of "Rhumann's purple" is a confirmatory test for the presence of:
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Among the following compounds most basic amino acid is:
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Which of the following compounds can form a zwitter ion?
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Chemistry>Organic Chemistry>Biomolecules>Proteins
Which of the following will not exist in Zwitterionic form at pH=7?