Question 1

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

Accepted Answer

Organic compounds are defined by the presence of carbon-hydrogen ($$C-H) $$bonds, whereas inorganic compounds typically lack these bonds.

Question 2

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

Accepted Answer

Carbohydrates: monosaccharides; Proteins: amino acids; Nucleic acids: nucleotides; Lipids: fatty acids and glycerol

Question 3

A patient is unable to properly digest starch due to a deficiency in the enzyme amylase. Which chemical reaction is most directly affected?

Accepted Answer

Hydrolysis

Question 4

Which of the following is a function of phospholipids in the human body?

Accepted Answer

Forming the structural basis of cell membranes

Question 5

A protein's tertiary structure is primarily stabilized by which of the following interactions?

Accepted Answer

Disulfide bridges, hydrophobic interactions, and ionic bonds among side chains

Question 6

Which scenario best illustrates the difference between fibrous and globular proteins?

Accepted Answer

Collagen provides structural support in connective tissue, while hemoglobin transports oxygen in blood.

Question 7

Which of the following statements correctly compares DNA and RNA?

Accepted Answer

DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil.

Question 8

Which type of RNA carries amino acids to the ribosome during protein synthesis?

Accepted Answer

tRNA (transfer RNA)

Question 9

A cell is observed to have a high rate of protein synthesis. Which type of RNA would you expect to be most abundant in the ribosomes of this cell?

Accepted Answer

rRNA

Question 10

Which of the following best describes the function of ATP in cellular metabolism?

Accepted Answer

ATP acts as the primary energy currency, transferring energy for cellular work.

Question 11

Which enzyme catalyzes the exergonic hydrolysis of ATP to ADP and inorganic phosphate ($$Pi$$)?

Accepted Answer

ATPase

Question 12

During dehydration synthesis, which of the following occurs?

Accepted Answer

A water molecule is removed to join two monomers into a polymer.

Question 13

Which of the following equations correctly represents the hydrolysis of a disaccharide?

Accepted Answer

$$C_{12}H$$_{22}$$O_{11} + H$$_{2}$$O \rightarrow 2C_{6}H$$_{12}$$O_{6}$

Question 14

Which of the following is NOT a type of lipid found in the human body?

Accepted Answer

Glycogen

Question 15

A mutation causes a change in the sequence of amino acids in a protein. Which level of protein structure is directly affected?

Accepted Answer

Primary structure

Question 16

Which of the following best describes the quaternary structure of a protein?

Accepted Answer

The association of multiple polypeptide chains to form a functional protein complex.

Question 17

Which of the following is a correct pairing of a macromolecule and its polymer?

Accepted Answer

Carbohydrate: glycogen

Question 18

Which process is responsible for the synthesis of ATP from ADP and inorganic phosphate ($$Pi) $$during cellular respiration?

Accepted Answer

ATP synthase activity

Question 19

Which of the following best describes the role of mRNA in protein synthesis?

Accepted Answer

mRNA provides the template for the sequence of amino acids in a protein.

Question 20

A patient is diagnosed with a disorder affecting steroid hormone production. Which type of macromolecule is directly involved in this condition?

Accepted Answer

Lipids

Chapter 2 Part B: Organic Compounds and Biological Macromolecules

Study Guide - Practice Questions