Question 1

Which process is responsible for joining two monomers together to form a polymer, and what is the byproduct of this reaction?

Accepted Answer

Dehydration reaction; water is released

Question 2

A patient is unable to digest starch but can digest glucose. Which type of chemical bond is most likely missing from their digestive enzymes?

Accepted Answer

Glycosidic bond ($\mathrm{\alpha}$-1,4 linkage)

Question 3

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Unsaturated fatty acids contain one or more double bonds, resulting in a bent structure

Question 4

Cellulose and starch are both polymers of glucose. What structural difference accounts for their distinct properties?

Accepted Answer

Cellulose has $\mathrm{\beta}$-1,4 glycosidic linkages, while starch has $\mathrm{\alpha}$-1,4 linkages

Question 5

Which macromolecule is primarily responsible for catalyzing chemical reactions in living organisms?

Accepted Answer

Proteins (enzymes)

Question 6

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

Accepted Answer

Primary, secondary, tertiary, and quaternary structures

Question 7

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

Accepted Answer

Forming a bilayer that separates the cell from its environment

Question 8

A scientist isolates a molecule with the formula $\mathrm{C_6H_{12}O_6}$. Which type of macromolecule is this most likely to be?

Accepted Answer

A monosaccharide (carbohydrate)

Question 9

Which of the following best explains why chaperonins are important for protein function?

Accepted Answer

They assist in the proper folding of polypeptides, preventing misfolding and aggregation

Question 10

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Energy storage

Question 11

A DNA molecule contains the following sequence: AGCT. Which type of bond connects the nucleotides along the backbone of this molecule?

Accepted Answer

Phosphodiester bonds

Question 12

Which of the following statements about the structure of amino acids is correct?

Accepted Answer

All amino acids have a carboxyl group, an amino group, and a unique R group attached to a central carbon

Question 13

Which macromolecule is most directly involved in the transmission of genetic information from parent to offspring?

Accepted Answer

Nucleic acids (DNA)

Question 14

A researcher finds that two species have very similar DNA sequences. What does this suggest about their evolutionary relationship?

Accepted Answer

They share a recent common ancestor

Question 15

Which of the following is a correct description of a dehydration reaction?

Accepted Answer

A reaction that joins monomers to form polymers by removing a water molecule

Question 16

Which of the following is a major structural component of plant cell walls?

Accepted Answer

Cellulose

Question 17

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

Accepted Answer

The overall three-dimensional shape formed by multiple polypeptide chains

Question 18

Which type of macromolecule is hemoglobin, and what is its primary function?

Accepted Answer

Protein; transport of oxygen in the blood

Question 19

Which of the following is true about the structure of phospholipids in biological membranes?

Accepted Answer

They have hydrophobic tails and hydrophilic heads

Question 20

Which of the following is a correct example of a nucleotide found in DNA?

Accepted Answer

Thymine + deoxyribose + phosphate

Biological Macromolecules: Structure and Function

Study Guide - Practice Questions