Question 1

Which of the following best explains how glucose and galactose differ from each other as monosaccharides?

Accepted Answer

They differ in the arrangement of hydroxyl groups around one carbon atom.

Question 2

Which of the following statements about glycosidic linkages is correct?

Accepted Answer

They are covalent bonds formed by condensation reactions between hydroxyl groups.

Question 3

Which of the following is a key structural difference between starch and cellulose?

Accepted Answer

Starch contains $$\alpha-1$$,4-glycosidic linkages, while cellulose contains $$\beta-1$$,4-glycosidic linkages.

Question 4

Which of the following best describes the function of glycogen in animal cells?

Accepted Answer

It stores glucose for energy.

Question 5

Why are most organisms unable to digest cellulose?

Accepted Answer

They lack enzymes to hydrolyze $$\beta-1$$,4-glycosidic linkages.

Question 6

Which of the following is NOT a function of carbohydrates in cells?

Accepted Answer

Catalyzing chemical reactions

Question 7

A certain monosaccharide has the formula $$C_5H_{10}O_5$. Which of the following statements is true?

Accepted Answer

It is a pentose sugar.

Question 8

Which of the following best explains why carbohydrates are a good source of energy?

Accepted Answer

They contain many C-H and C-C bonds with high potential energy.

Question 9

Which of the following is an example of a condensation reaction in carbohydrate chemistry?

Accepted Answer

The formation of a glycosidic linkage between two monosaccharides, releasing water.

Question 10

Which of the following best describes the role of glycoproteins on the cell surface?

Accepted Answer

They help cells recognize each other as 'self' and facilitate cell signaling.

Question 11

Which of the following is a correct comparison between starch and glycogen?

Accepted Answer

Starch is found in plants, while glycogen is found in animals.

Question 12

Which of the following is an example of an isomer relevant to carbohydrate chemistry?

Accepted Answer

Glucose and galactose, which have the same molecular formula but different structures.

Question 13

A patient is unable to digest lactose due to a deficiency in the enzyme lactase. Which bond is the patient unable to hydrolyze?

Accepted Answer

$$\beta-1$$,4-glycosidic linkage

Question 14

Which of the following would most likely happen to the molecular structure of proteins, nucleic acids, and carbohydrates if food is boiled?

Accepted Answer

Hydrogen bonds and ionic bonds would be disrupted, but covalent bonds like glycosidic linkages would remain intact.

Question 15

Which of the following best explains why cellulose is considered dietary fiber in human nutrition?

Accepted Answer

Humans lack enzymes to hydrolyze $$\beta-1$$,4-glycosidic linkages in cellulose.

Question 16

Which of the following is a precursor function of carbohydrates in cells?

Accepted Answer

Serving as building blocks for nucleotides and amino acids.

Question 17

Which of the following statements about the energy stored in carbohydrates is correct?

Accepted Answer

The potential energy is primarily found in the C-H and C-C bonds.

Question 18

Which of the following best describes the difference between an aldose and a ketose sugar?

Accepted Answer

An aldose has a carbonyl group at the end of the carbon chain, while a ketose has it within the chain.

Question 19

Which of the following is a real-life application of glycoproteins in medicine?

Accepted Answer

Blood type determination based on specific carbohydrate markers on red blood cells.

An Introduction to Carbohydrates

Study Guide - Practice Questions