Question 1

Which of the following best describes a dehydration synthesis reaction?

Accepted Answer

A reaction in which two monomers are joined by the removal of a water molecule, forming a covalent bond.

Question 2

Which equation correctly represents the hydrolysis of a disaccharide?

Accepted Answer

$$C_{12}H$$_{22}$$O_{11} + H_2O \rightarrow 2C_6H_{12}O_6$

Question 3

Which of the following is a monosaccharide?

Accepted Answer

Glucose

Question 4

Which carbohydrate is a polymer made up of glucose monomers and serves as energy storage in animals?

Accepted Answer

Glycogen

Question 5

Which of the following statements about lipids is correct?

Accepted Answer

Lipids are hydrophobic molecules that consist mostly of hydrocarbons.

Question 6

Which structure is characteristic of a steroid molecule?

Accepted Answer

A backbone of four interlocking hydrocarbon rings.

Question 7

Which of the following is a disaccharide composed of glucose and fructose?

Accepted Answer

Sucrose

Question 8

Which carbohydrate is the main structural component of plant cell walls?

Accepted Answer

Cellulose

Question 9

Which of the following best explains why lipids are insoluble in water?

Accepted Answer

Lipids are composed mainly of nonpolar hydrocarbon chains, which do not interact with water.

Question 10

Which of the following is NOT a function of triglycerides in the human body?

Accepted Answer

Formation of cell membranes

Question 11

Which of the following is a pentose sugar found in nucleic acids?

Accepted Answer

Ribose

Question 12

Which of the following correctly matches the carbohydrate with its class?

Accepted Answer

Galactose – Monosaccharide

Question 13

A patient is unable to digest lactose. Which enzyme is most likely deficient, and what type of carbohydrate is lactose?

Accepted Answer

Lactase; disaccharide

Question 14

Which of the following is a correct statement about the ratio of hydrogen to oxygen in carbohydrates?

Accepted Answer

The ratio of hydrogen to oxygen is 2:1.

Question 15

Which of the following is a function of phospholipids in biological systems?

Accepted Answer

Formation of cell membranes

Question 16

Which of the following is true regarding the structure of a triglyceride?

Accepted Answer

It consists of a glycerol molecule bonded to three fatty acids.

Question 17

Which of the following is a disaccharide formed from two glucose molecules?

Accepted Answer

Maltose

Question 18

Which of the following carbohydrates is NOT a hexose sugar?

Accepted Answer

Ribose

Question 19

Which of the following best describes the difference between monosaccharides and polysaccharides?

Accepted Answer

Monosaccharides are the monomers that make up polysaccharides, which are polymers of many sugar units.

Question 20

Which of the following is a real-life example of a dehydration synthesis reaction in the human body?

Accepted Answer

Forming glycogen from glucose molecules in the liver.

Biomolecules Part 1 Recap: Carbohydrates and Related Reactions

Study Guide - Practice Questions