Proteins and Their Functions

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Questions and Answers

What is the function of proteins such as pepsin and amylase?

  • Catalyzing chemical reactions (correct)
  • Coordinating cell signaling pathways
  • Providing energy
  • Providing structural support

How many amino acids are found in naturally derived proteins?

  • 10
  • 20 (correct)
  • Over 500
  • Exactly 500

What determines the primary sequence of a protein?

  • The gene sequence (correct)
  • The length of the protein
  • The function of the protein
  • The type of amino acids present

What is the role of mRNA in the process of gene expression?

<p>Translation of protein (C)</p> Signup and view all the answers

What is the main reason for the different forms and functions of proteins?

<p>Differences in the amino acid composition (B)</p> Signup and view all the answers

What is the property of amino acids that influences the function and folding of a protein?

<p>Their chemical properties (C)</p> Signup and view all the answers

What is the typical range of amino acids in a polypeptide chain?

<p>50-2000 (A)</p> Signup and view all the answers

What is the term used to describe the concept that 'amino acid sequence determines protein structure and structure dictates biochemical function'?

<p>Threshold concept (A)</p> Signup and view all the answers

What is the Greek term that means 'leavened' and is used to describe enzymes?

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

Who discovered the protein-digesting enzyme trypsin?

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

What is the minimum molecular weight of a polypeptide chain to be considered a protein?

<p>10000 (D)</p> Signup and view all the answers

What is the term used to describe the bonds formed between the amino group of one amino acid and the carboxyl group of another?

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

Who demonstrated that enzymes can be crystallized and their arrangement of atoms can be studied?

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

What is the process that breaks weak bonds, leading to the denaturing of proteins?

<p>Breaking of hydrogen bonds (C)</p> Signup and view all the answers

Who determined the exact order of the amino acids in the molecule bovine insulin?

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

What is the term used to describe the 'first quality' or 'first' class of biomolecules?

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

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