Question 1

Which of the following best describes the relationship between monomers and polymers in biological macromolecules?

Accepted Answer

Monomers are small molecules that join together via covalent bonds to form polymers.

Question 2

Which type of macromolecule is primarily responsible for catalyzing biochemical reactions in cells?

Accepted Answer

Proteins

Question 3

A patient is diagnosed with a genetic disorder that affects the structure of their cell membranes. Which macromolecule is most likely altered in this patient?

Accepted Answer

Phospholipids

Question 4

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

Accepted Answer

Protein – Amino acid

Question 5

During cellular respiration, glucose is broken down to produce ATP. Which class of macromolecule does glucose belong to?

Accepted Answer

Carbohydrates

Question 6

Which of the following best explains why enzymes are highly specific in their function?

Accepted Answer

The three-dimensional structure of an enzyme creates an active site that fits only specific substrates.

Question 7

A mutation causes a change in the sequence of nucleotides in DNA. Which process is most directly affected by this mutation?

Accepted Answer

Protein production

Question 8

Which of the following equations correctly represents the hydrolysis of a disaccharide into two monosaccharides?

Accepted Answer

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

Question 9

Which of the following statements about phospholipids is correct?

Accepted Answer

They have hydrophilic heads and hydrophobic tails, forming the basic structure of plasma membranes.

Question 10

A scientist is studying a molecule that stores genetic information and is composed of nucleotides. Which macromolecule is she most likely studying?

Accepted Answer

Nucleic acid

Question 11

Which of the following best describes the role of cholesterol in animal cell membranes?

Accepted Answer

It modulates membrane fluidity and stability.

Question 12

Which of the following is a function of membrane proteins?

Accepted Answer

Facilitating cell communication and transport of molecules across the membrane.

Question 13

A person is unable to digest lactose due to a deficiency in the enzyme lactase. Which type of macromolecule is lactase?

Accepted Answer

Protein

Question 14

Which of the following best explains why ATP is considered the energy currency of the cell?

Accepted Answer

ATP stores energy in its phosphate bonds, which can be released to power cellular processes.

Question 15

Which of the following is the correct sequence of events in the central dogma of molecular biology?

Accepted Answer

DNA $$\rightarrow$$ RNA $$\rightarrow$$ Protein

Question 16

A researcher adds a chemical that disrupts covalent bonds in a cell. Which of the following structures would be most directly affected?

Accepted Answer

Polymers such as proteins and nucleic acids

Question 17

Which of the following best describes the structure of a nucleotide?

Accepted Answer

A phosphate group, a five-carbon sugar, and a nitrogenous base

Question 18

Which of the following scenarios best illustrates the function of enzymes in a real-world context?

Accepted Answer

Salivary amylase in the mouth breaks down starch into maltose during digestion.

Question 19

Which of the following statements about the role of carbohydrates in cells is correct?

Accepted Answer

They serve as a primary source of energy and as structural components.

Question 20

A cell is observed to have a high concentration of ribosomes. Which process is likely to be occurring at an elevated rate in this cell?

Accepted Answer

Protein synthesis

Biological Macromolecules: Structure, Function, and Importance

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