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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Amino acids required in the human diet and not synthesized by the body are called

trace
essential
accessory
specialized

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Structure and Properties of Amino Acids
Which of the following is not the hydrophobic and aromatic amino acid?

Tryptophan
Phenylalanine
Tyrosine
None of these

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Structure and Properties of Amino Acids
What is the end product of leucine metabolism?

Pyruvic acid
Acetyl carnitine
Oxaloacetic acid
Acetyl-CoA

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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 __________ .

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

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

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

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Structure and Properties of Amino Acids
When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes

a cation
an isotope
nonpolar
a zwitterions

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MORE MCQ ON Structure and Properties of Amino Acids

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