Question 1

Which of the following best describes the general formula for a monosaccharide?

Accepted Answer

$$C_nH_{2n}O_{n}$$,\ n \geq 3$

Question 2

A sugar with a carbonyl group at the end of its carbon chain is classified as which type of monosaccharide?

Accepted Answer

Aldose

Question 3

Which of the following is a correct example of a triose ketose?

Accepted Answer

Dihydroxyacetone

Question 4

Monosaccharides can be classified based on the number of carbon atoms present. What is the name for a monosaccharide with five carbons?

Accepted Answer

Pentose

Question 5

Which statement best explains why glucose and fructose are considered isomers?

Accepted Answer

They have the same molecular formula but different arrangements of atoms.

Question 6

Which of the following is NOT a major role played by carbohydrates in living organisms?

Accepted Answer

Catalyzing chemical reactions

Question 7

If a monosaccharide has the formula $$C_6H_{12}O_6$, what type of sugar is it?

Accepted Answer

Hexose

Question 8

Which of the following correctly matches the carbonyl group position with the type of monosaccharide?

Accepted Answer

Carbonyl group at the end: aldose

Question 9

Which of the following is a correct example of a hexose aldose?

Accepted Answer

Glucose

Question 10

A scientist discovers a sugar with the formula $$C_4H_8O_4. $$What is the correct classification for this sugar?

Accepted Answer

Tetrose

Question 11

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

Accepted Answer

Aldoses have a carbonyl group at the end of the carbon chain, while ketoses have it within the chain.

Question 12

Which of the following is true about the structure of monosaccharides?

Accepted Answer

They contain at least one carbonyl group and two hydroxyl groups.

Question 13

Which of the following is a correct real-world application of carbohydrate classification?

Accepted Answer

Glucose is used in IV solutions because it is a hexose aldose, which is easily metabolized by cells.

Question 14

Which of the following statements about monosaccharides is FALSE?

Accepted Answer

Monosaccharides always have a carbonyl group at the end of the carbon chain.

Question 15

Which of the following best explains why carbohydrates are important for cell identity?

Accepted Answer

Carbohydrates are found on the cell surface and help cells recognize each other.

Carbohydrates: Structure, Classification, and Biological Roles

Study Guide - Practice Questions