Macromolecules and Proteins Overview
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Questions and Answers

Which type of macromolecule is synthesized by condensation reactions?

  • Nucleic acids
  • Polysaccharides
  • Proteins (correct)
  • Lipids

What is the role of enzymes in cells?

  • Catalysts for chemical reactions (correct)
  • Enable cell communication
  • Structural support
  • Transportation

How many common small molecules are used to synthesize most biological macromolecules in cells?

  • 30 (correct)
  • 20
  • 50
  • 40

Which category of proteins provides physical support and shape to cells?

<p>Structural proteins (B)</p> Signup and view all the answers

What is the characteristic of the R group for all amino acids?

<p>Unique for each amino acid (D)</p> Signup and view all the answers

How many amino acids have hydrophilic R groups?

<p>11 (D)</p> Signup and view all the answers

What is the function of motility proteins in cells?

<p>Contraction and movement (B)</p> Signup and view all the answers

Which type of proteins enable cells to respond to chemical stimuli from the environment?

<p>Receptor proteins (A)</p> Signup and view all the answers

How many amino acids have nonpolar, hydrophobic R groups?

<p>9 (B)</p> Signup and view all the answers

What is the characteristic of the R groups for hydrophilic amino acids?

<p>Polar or charged at cellular pH (A)</p> Signup and view all the answers

Why do proteins fall into nine major classes?

<p>To serve different functions within the cell (B)</p> Signup and view all the answers

What is the unique characteristic of the α carbon atom in amino acids?

<p>It is asymmetric (C)</p> Signup and view all the answers

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