Biological Macromolecules and Proteins

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Questions and Answers

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

  • Motility proteins
  • Enzymes
  • Receptor proteins (correct)
  • Structural proteins

How many major classes do proteins fall into?

  • Seven
  • Five
  • Ten
  • Nine (correct)

What is the central element common to all amino acids in their structure?

  • R group
  • Amino group
  • Side chain
  • α carbon atom (correct)

Which type of amino acids have hydrophobic R groups?

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

What is the primary reason for the uniqueness of each protein's amino acid sequence?

<p>Amino acids have unique side chains (A)</p> Signup and view all the answers

Why are receptor proteins crucial for cells?

<p>To enable cells to respond to chemical stimuli from the environment (D)</p> Signup and view all the answers

What is the role of structural proteins in cells?

<p>Support and shape (A)</p> Signup and view all the answers

Why are transport proteins important in cellular processes?

<p>To move substances into and out of cells (A)</p> Signup and view all the answers

What is a key characteristic of acidic amino acids?

<p>They are negatively charged (A)</p> Signup and view all the answers

How many different types of amino acids are used in protein synthesis?

<p>20 (D)</p> Signup and view all the answers

What determines the specific properties of amino acids?

<p>The nature of their R groups (D)</p> Signup and view all the answers

What sets glycine apart from other amino acids in terms of its structure?

<p>It is the only one with an asymmetric α carbon atom (C)</p> Signup and view all the answers

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