Digestive Enzymes
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Questions and Answers

What is the result of the complementary nature between the shape of the active site on the enzyme and its substrate(s)?

  • The enzyme binds to multiple substrates
  • The enzyme becomes denatured
  • The specificity of an enzyme is achieved (correct)
  • The lock and key model is disproven

Why do enzymes have specific three-dimensional shapes?

  • Because they are formed from carbohydrate molecules
  • Because they are formed from protein molecules (correct)
  • Because they are formed from DNA molecules
  • Because they are formed from lipid molecules

What determines the shape of an enzyme?

  • The type of carbohydrate molecules
  • The order of nucleotides
  • The type of lipid molecules
  • The order of amino acids (correct)

What is the 'lock and key theory' used to explain?

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

What happens when an enzyme and its complementary substrate collide?

<p>An enzyme-substrate complex forms, and the reaction occurs (D)</p> Signup and view all the answers

What forms from the substrate(s) during an enzyme-substrate reaction?

<p>A product (or products) (A)</p> Signup and view all the answers

What is the role of the active site of an enzyme?

<p>To bind to a specific substrate (C)</p> Signup and view all the answers

What is the function of an enzyme in a living organism?

<p>To catalyse specific chemical reactions (A)</p> Signup and view all the answers

What is the primary role of enzymes in biological reactions?

<p>They speed up chemical reactions without being used up. (B)</p> Signup and view all the answers

Which enzyme breaks down starch into maltose?

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

Where is amylase produced?

<p>Salivary glands, pancreas, and small intestine (C)</p> Signup and view all the answers

Which group of enzymes is responsible for breaking down proteins?

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

Where does protein digestion primarily take place?

<p>Stomach and small intestine (D)</p> Signup and view all the answers

What do lipases break down?

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

Where are lipase enzymes produced?

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

What is one role of bile in the digestive system?

<p>It neutralizes hydrochloric acid from the stomach. (C)</p> Signup and view all the answers

What is the primary purpose of digestion?

<p>To convert large, insoluble molecules into smaller, soluble molecules (C)</p> Signup and view all the answers

Which enzyme is used to break down starch?

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

What is the suggested temperature for controlling enzyme activity in an experiment using a water bath?

<p>35℃ (B)</p> Signup and view all the answers

Why is a colorimeter used in enzyme experiments?

<p>To precisely quantify the progress of the reaction (C)</p> Signup and view all the answers

Which enzyme is responsible for breaking down proteins?

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

What role does temperature play in enzyme activity experiments?

<p>It affects the kinetic energy of molecules involved in the reaction (B)</p> Signup and view all the answers

Which statement describes enzymes denaturing?

<p>The enzyme's active site changes shape, reducing its functionality (C)</p> Signup and view all the answers

What is the main function of a pH buffer in enzyme activity experiments?

<p>To maintain a constant pH environment for the reactions (B)</p> Signup and view all the answers

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