Question 1

Which enzyme is primarily responsible for the initial breakdown of starch in the human digestive system, and where does this process begin?

Accepted Answer

Amylase in the mouth

Question 2

What is the main form of carbohydrate absorbed into the bloodstream after digestion?

Accepted Answer

Monosaccharides

Question 3

Which of the following best describes the role of the pancreas in carbohydrate digestion?

Accepted Answer

It releases pancreatic amylase to further digest starches in the small intestine

Question 4

A patient is diagnosed with lactose intolerance. Which enzyme deficiency is most likely responsible for their symptoms?

Accepted Answer

Lactase

Question 5

Which of the following is a property of soluble (fermentable) fiber?

Accepted Answer

It dissolves in water and can be fermented by gut bacteria

Question 6

What is the recommended dietary allowance (RDA) for fiber for adults?

Accepted Answer

$$25-38\ 	ext{g/day}$$

Question 7

Which of the following ingredients is a common source of fermentable fiber added to foods?

Accepted Answer

Inulin

Question 8

What is the primary health benefit of insoluble (non-fermentable) fiber?

Accepted Answer

It increases stool bulk and helps prevent constipation

Question 9

Which of the following best describes the difference between fermentable and non-fermentable fiber?

Accepted Answer

Fermentable fiber is broken down by gut bacteria, while non-fermentable fiber passes through the gut largely unchanged

Question 10

A person consumes a meal high in sucrose. Which enzyme is responsible for breaking down sucrose, and what are the resulting monosaccharides?

Accepted Answer

Sucrase; glucose and fructose

Question 11

Which of the following foods is the best source of dietary fiber?

Accepted Answer

Brown rice

Question 12

What is the main function of brush border enzymes in carbohydrate digestion?

Accepted Answer

They break down disaccharides into monosaccharides at the surface of the small intestine

Question 13

Which of the following is a health benefit associated with soluble fiber?

Accepted Answer

Lowers blood cholesterol levels

Question 14

A patient with a history of hemorrhoids is advised to increase their fiber intake. Which type of fiber is most likely to help alleviate their symptoms?

Accepted Answer

Soluble fiber, because it forms a gel and softens stool

Question 15

Which of the following best describes the role of fermentable fiber in human health?

Accepted Answer

It is fermented by gut bacteria to produce short-chain fatty acids that benefit colon health

Question 16

Which of the following is NOT a brush border enzyme involved in carbohydrate digestion?

Accepted Answer

Amylase

Question 17

A food label lists 'chicory root' as an ingredient. What type of fiber does this ingredient primarily provide?

Accepted Answer

Inulin

Question 18

Which of the following best explains why fiber is considered a prebiotic?

Accepted Answer

It serves as food for beneficial gut bacteria, promoting their growth

Question 19

A patient with diverticulitis is advised to increase their intake of which type of fiber to help prevent future flare-ups?

Accepted Answer

Insoluble fiber

Question 20

Which of the following best describes the absorption of carbohydrates in the digestive tract?

Accepted Answer

Monosaccharides are absorbed in the small intestine and transported to the liver via the portal vein

Carbohydrate Digestion and Fiber Study Guide

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