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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following is not an essential amino acid?

Glycine
All of these
Glutamic acid
Aspartic acid

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Structure and Properties of Amino Acids
Which of the following is a nonprotein amino acid?

Cystine
Hydroxylysine
Dopamine
None of these

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Structure and Properties of Amino Acids
In a polypeptide average mass of an amino acid residue is

150 daltons
118 daltons
80 daltons
110 daltons

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Structure and Properties of Amino Acids
Serine and threonine are polar amino acids due to

reactive alcoholic group in the side chain
reactive keto group in the side chain
reactive hydroxyl group in the side chain
reactive aldehyde group in the side chain

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Structure and Properties of Amino Acids
The α-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ .

3.3, and 10.5
2.2, and 9.4
1.1, and 12.1
6.5, and 8.0

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Structure and Properties of Amino Acids
The sequence of letters 'WYQN' will represent

Tryptophan, tyrosine, glutamic acid, asparagine
Glutamine, tyrosine, tryptophan, aspartic acid
Tryptophan, tyrosine, glutamine, asparagine
Tryptophan, glutamine, tryptophan, asparagine

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