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Digestive Enzymes: Their Roles and Importance

Description: Digestive Enzymes: Their Roles and Importance
Number of Questions: 15
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Which enzyme is responsible for breaking down proteins into amino acids?

  1. Pepsin

  2. Amylase

  3. Lipase

  4. Lactase


Correct Option: A
Explanation:

Pepsin is a protease enzyme that breaks down proteins into smaller peptides and amino acids in the stomach.

Where is amylase produced, and what is its primary function?

  1. Pancreas

  2. Liver

  3. Small Intestine

  4. Salivary Glands


Correct Option: D
Explanation:

Amylase is produced in the salivary glands and pancreas. Its primary function is to break down carbohydrates, particularly starch, into simpler sugars like maltose and glucose.

Which enzyme is responsible for breaking down fats into fatty acids and glycerol?

  1. Pepsin

  2. Amylase

  3. Lipase

  4. Lactase


Correct Option: C
Explanation:

Lipase is a fat-digesting enzyme that breaks down triglycerides into fatty acids and glycerol in the small intestine.

What is the primary function of lactase?

  1. Breaking down proteins

  2. Breaking down carbohydrates

  3. Breaking down fats

  4. Breaking down lactose


Correct Option: D
Explanation:

Lactase is an enzyme produced in the small intestine that breaks down lactose, the sugar found in milk and dairy products, into glucose and galactose.

Where is protease produced, and what is its primary function?

  1. Stomach

  2. Pancreas

  3. Small Intestine

  4. Liver


Correct Option: B
Explanation:

Protease is produced in the pancreas and is responsible for breaking down proteins into smaller peptides and amino acids in the small intestine.

Which enzyme is responsible for breaking down cellulose, a complex carbohydrate found in plant cell walls?

  1. Pepsin

  2. Amylase

  3. Cellulase

  4. Lactase


Correct Option: C
Explanation:

Cellulase is an enzyme produced by some bacteria and fungi that breaks down cellulose into simpler sugars.

What is the role of hydrochloric acid in digestion?

  1. Neutralizing stomach acid

  2. Breaking down proteins

  3. Activating digestive enzymes

  4. Killing harmful bacteria


Correct Option: D
Explanation:

Hydrochloric acid, produced in the stomach, helps kill harmful bacteria and creates an acidic environment necessary for the activation of pepsin.

Which enzyme is responsible for breaking down starch into maltose?

  1. Pepsin

  2. Amylase

  3. Lipase

  4. Lactase


Correct Option: B
Explanation:

Amylase, produced in the pancreas and salivary glands, breaks down starch into maltose, a disaccharide.

What is the primary function of sucrase?

  1. Breaking down proteins

  2. Breaking down carbohydrates

  3. Breaking down fats

  4. Breaking down sucrose


Correct Option: D
Explanation:

Sucrase, produced in the small intestine, breaks down sucrose, a disaccharide, into glucose and fructose.

Which enzyme is responsible for breaking down maltose into glucose?

  1. Pepsin

  2. Amylase

  3. Maltase

  4. Lactase


Correct Option: C
Explanation:

Maltase, produced in the small intestine, breaks down maltose, a disaccharide, into two molecules of glucose.

What is the role of bile in digestion?

  1. Breaking down proteins

  2. Breaking down carbohydrates

  3. Breaking down fats

  4. Neutralizing stomach acid


Correct Option: C
Explanation:

Bile, produced by the liver and stored in the gallbladder, helps break down fats into smaller droplets, aiding in their digestion and absorption.

Which enzyme is responsible for breaking down DNA and RNA into nucleotides?

  1. Pepsin

  2. Amylase

  3. Lipase

  4. Nuclease


Correct Option: D
Explanation:

Nuclease, produced in the pancreas and small intestine, breaks down DNA and RNA into nucleotides, the building blocks of nucleic acids.

What is the role of peptidase in digestion?

  1. Breaking down proteins

  2. Breaking down carbohydrates

  3. Breaking down fats

  4. Breaking down nucleic acids


Correct Option: A
Explanation:

Peptidase, produced in the pancreas and small intestine, breaks down proteins into smaller peptides and amino acids.

Which enzyme is responsible for breaking down glycogen into glucose?

  1. Pepsin

  2. Amylase

  3. Glycogenase

  4. Lactase


Correct Option: C
Explanation:

Glycogenase, produced in the liver and muscles, breaks down glycogen, a storage form of glucose, into glucose.

What is the primary function of intestinal alkaline phosphatase?

  1. Breaking down proteins

  2. Breaking down carbohydrates

  3. Breaking down fats

  4. Breaking down nucleic acids


Correct Option: D
Explanation:

Intestinal alkaline phosphatase, produced in the small intestine, breaks down nucleic acids into nucleotides.

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