Question 1

Which of the following best describes the difference between organic and inorganic compounds in biological systems?

Accepted Answer

Organic compounds always contain carbon and hydrogen, often with oxygen or nitrogen, and are generally complex molecules originating in living organisms.

Question 2

Which functional group is characteristic of carbohydrates and is responsible for their solubility in water?

Accepted Answer

Hydroxyl group $$(-OH)$$

Question 3

A dehydration synthesis reaction between two glucose molecules results in the formation of which type of bond and what byproduct?

Accepted Answer

A glycosidic bond and water $$H_2O$$

Question 4

Which process is responsible for breaking down polymers into monomers in the digestive tract, and what molecule is required for this reaction?

Accepted Answer

Hydrolysis; water $$H_2O$$

Question 5

Which of the following correctly matches a macromolecule with its monomer?

Accepted Answer

Protein – Amino acid

Question 6

Triglycerides are formed from which combination of monomers?

Accepted Answer

Three fatty acids and one glycerol

Question 7

Which statement best explains why phospholipids are vital to cell membrane structure?

Accepted Answer

They have both hydrophilic (phosphate head) and hydrophobic (fatty acid tail) regions, allowing them to form bilayers.

Question 8

Which of the following is a physiological role of glycogen in the human body?

Accepted Answer

Storage of glucose for energy in liver and muscle cells

Question 9

A patient is found to have a deficiency in enzymes that catalyze hydrolysis reactions. Which of the following symptoms would most likely result?

Accepted Answer

Impaired digestion of macromolecules, leading to malnutrition

Question 10

Which level of protein structure is primarily stabilized by hydrogen bonds between backbone atoms, resulting in alpha helices and beta sheets?

Accepted Answer

Secondary structure

Question 11

What is the consequence of protein denaturation in terms of its function?

Accepted Answer

Loss of specific shape leads to loss of biological function

Question 12

Which of the following best describes the structure of DNA?

Accepted Answer

Two long chains of nucleotides twisted into a double helix, held together by hydrogen bonds

Question 13

Which macromolecule is responsible for storing and transmitting genetic information?

Accepted Answer

Nucleic acids

Question 14

ATP is synthesized from ADP and inorganic phosphate. Which equation correctly represents this reaction?

Accepted Answer

$$ADP + P_i \rightarrow ATP$$

Question 15

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

Accepted Answer

Storage of genetic information

Question 16

A mutation causes a change in the primary structure of a protein. Which levels of protein structure could be affected as a result?

Accepted Answer

All levels: secondary, tertiary, and quaternary

Question 17

Which of the following correctly matches a functional group with the type of macromolecule it is commonly found in?

Accepted Answer

Phosphate group $$(-H_2PO_4)$$ – Nucleic acids

Question 18

Which of the following statements about saturated and unsaturated fatty acids is correct?

Accepted Answer

Saturated fatty acids have no double bonds and are solid at room temperature.

Question 19

Which type of bond links nucleotides together in a strand of DNA or RNA?

Accepted Answer

Phosphodiester bond

Question 20

A cell rapidly exhausts its supply of ATP. What is the most immediate consequence for cellular function?

Accepted Answer

Energy-dependent processes such as active transport and biosynthesis will halt.

Organic Macromolecules: Structure, Function, and Biological Roles

Study Guide - Practice Questions

Study Guide - Flashcards