Physical Chemistry of Macromolecules Quiz

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Questions and Answers

What are macromolecules?

  • Very large molecules assembled from smaller molecules (correct)
  • Polymers assembled from monomers
  • Medium-sized molecules assembled from small molecules
  • Small molecules assembled from larger molecules

Which of the following is NOT a naturally occurring macromolecule?

  • Protein enzymes
  • DNA
  • Nylon (correct)
  • Cellulose

Why is it important to understand the structural features of macromolecules?

  • To calculate their density
  • To understand their physical and chemical properties (correct)
  • To measure their electrical conductivity
  • To determine their color

What do macromolecules give rise to that require investigation?

<p>Molar masses and shapes (A)</p> Signup and view all the answers

At what different levels does the meaning of the structure of a macromolecule change?

<p>Arrangement of building blocks levels (D)</p> Signup and view all the answers

What type of units compose polymers such as nylon and polystyrene?

<p>Monomers (C)</p> Signup and view all the answers

What gives the protein its unique identity?

<p>The sequence of amino acids along the protein chain (A)</p> Signup and view all the answers

Which molecule is a result of the transfer of a proton from the carboxylic acid group to the amine group?

<p>A zwitterion (C)</p> Signup and view all the answers

What type of polymer is shown in (b) in Figure 1?

<p>A cross-linked polymer (A)</p> Signup and view all the answers

What are proteins made up of?

<p>A large number of amino acids linked together by peptide bonds (C)</p> Signup and view all the answers

What gives rise to the formation of a peptide bond?

<p>A condensation reaction between the carboxyl group of one amino acid and the amino group of another amino acid (B)</p> Signup and view all the answers

What predominates at near-neutral pH values?

<p>Zwitterion formation (B)</p> Signup and view all the answers

What characteristic gives proteins their limitless possible arrangements of amino acids?

<p>The fact that proteins consist of hundreds of amino acids (B)</p> Signup and view all the answers

What term is used for molecules containing an amine group and a carboxylic acid group?

<p>-amino acids (C)</p> Signup and view all the answers

What are natural macromolecules dependent on for their shapes?

<p>$nonbonding interactions between molecules$ (A)</p> Signup and view all the answers

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Study Notes

Macromolecules

  • Macromolecules are large molecules composed of smaller units, found naturally or synthesized.

Importance of Structural Features

  • Understanding the structural features of macromolecules is crucial because it affects their functions and interactions.

Characteristics of Macromolecules

  • Macromolecules give rise to complex structures and functions that require investigation.
  • The meaning of a macromolecule's structure changes at different levels, including primary, secondary, tertiary, and quaternary structures.

Polymers

  • Polymers like nylon and polystyrene are composed of repeating units called monomers.

Proteins

  • Proteins are made up of amino acids, which give them unique identities.
  • The transfer of a proton from a carboxylic acid group to an amine group results in a peptide bond.
  • Proteins are composed of amino acids, which are linked by peptide bonds.

pH and Proteins

  • At near-neutral pH values, zwitterions predominate.

Amino Acids and Proteins

  • The limitless possible arrangements of amino acids give proteins their unique characteristics.
  • Molecules containing an amine group and a carboxylic acid group are called amino acids.
  • Natural macromolecules, such as proteins, are dependent on their shapes, which are crucial for their functions.

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