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Amino Acid Structure Quiz

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Questions and Answers

Which of the following is true about the structure of amino acids?

Only glycine has an asymmetric carbon atom

All amino acids have an asymmetric carbon atom

All of the above

The side chain R group gives each amino acid its identity (correct)

What is the basis for classification of natural amino acids?

The type of protein they form

Their essentiality

Their polarity and structural features (correct)

Their metabolic fate

Which of the following is true about the amino acids found in mammalian proteins?

There are 30 common amino acids found in mammalian proteins

All amino acids found in mammalian proteins have the same side chain R group

All amino acids found in mammalian proteins are coded by RNA

Almost all naturally occurring amino acids in mammalian proteins are L-amino acids (correct)

Which type of amino acid classification is based on the polarity and structural features of the side chains?

Classification based on polarity and structural features of side chains Signup and view all the answers

Which amino acid has a symmetrical α-carbon atom?

Glycine Signup and view all the answers

Which type of amino acid classification is based on the metabolic fate of amino acids?

Classification based on metabolic fate of amino acids Signup and view all the answers

Which of the following correctly describes the structure of an amino acid?

COOH, NH2 and side chain R group Signup and view all the answers

Which classification of natural amino acids is based on the polarity and structural features of the side chains?

Classification based on the polarity and structural features of the side chains Signup and view all the answers

Which configuration does the α-carbon atom of an amino acid have, except for glycine?

Can exist in both D and L configurations Signup and view all the answers

Study Notes

Amino Acid Structure

Amino acids have a specific structure, which is correctly described as having a central α-carbon atom bonded to an amino group, a carboxyl group, a hydrogen atom, and a side chain (R group).

Classification of Natural Amino Acids

The basis for classification of natural amino acids is the polarity and structural features of the side chains.
Classification of natural amino acids can also be based on the metabolic fate of amino acids.

Amino Acids in Mammalian Proteins

Amino acids found in mammalian proteins have a specific characteristic, with some exceptions.

α-Carbon Atom Configuration

The α-carbon atom of an amino acid has an asymmetric configuration, except for glycine which has a symmetrical α-carbon atom.
Glycine is the only amino acid that has a symmetrical α-carbon atom.

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Description

Test your knowledge on the structure of amino acids with our quiz! Learn about the COOH, NH2 and side chain R group that make up each amino acid, and discover the difference between the D and L configuration of the α-carbon. This quiz is perfect for students and professionals in the fields of biology and chemistry.