Protein Macromolecules Structure Quiz

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What is the main function of the α carbon in an amino acid?

It is responsible for forming the peptide bond.

It determines the acidity of the amino acid.

It provides the distinctive chemical properties to the amino acid.

It serves as the chiral center. (correct)

Which part of an amino acid varies among the 20 common amino acids?

R group (side chain) (correct)

Hydrogen atom

Carboxyl group

Amino group

In the language of protein structure, what do amino acids represent?

Syntax rules

Words

Punctuation marks

Alphabets (correct)

What is the significance of the α-carbon in an amino acid?

It is the carbon next to the functional group. Signup and view all the answers

What makes glycine unique among amino acids?

It has a second hydrogen atom instead of an R group. Signup and view all the answers

Which type of amino acids have a distinctive cyclic structure in their R group?

Non-polar, aliphatic amino acids Signup and view all the answers

What type of amino acids are relatively nonpolar and can participate in hydrophobic interactions?

Aromatic amino acids Signup and view all the answers

Which amino acid groups are significantly more polar than phenylalanine?

Tyrosine and tryptophan Signup and view all the answers

Which type of amino acids absorb ultraviolet light to a significant extent?

Tryptophan and tyrosine Signup and view all the answers

Which group of amino acids are optically active and can exist as enantiomers?

L Stereoisomers Signup and view all the answers

What is the distinguishing feature of essential amino acids compared to non-essential amino acids?

Requirement from external sources Signup and view all the answers

In which class do aliphatic amino acids with a nonpolar side chain belong?

Nonpolar, aliphatic class Signup and view all the answers

Which type of amino acid R groups can form hydrogen bonds?

Polar, uncharged R groups Signup and view all the answers

Which amino acid group has the capability to reduce the structural flexibility of polypeptide regions containing it?

Secondary amino (imino) group containing amino acids Signup and view all the answers

What role does the distinctive cyclic structure in the R group play in proline residues?

Reduces structural flexibility Signup and view all the answers

Protein Macromolecules Structure Quiz

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