Question 1

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

Accepted Answer

Nucleic acid — Nucleotide

Question 2

Proteins are responsible for a wide range of functions in living organisms. Which of the following is NOT a function performed by proteins?

Accepted Answer

Storing genetic information

Question 3

A mutation in the primary structure of hemoglobin can lead to sickle cell disease. Which level of protein structure is directly affected by this mutation?

Accepted Answer

Primary structure

Question 4

Which type of bond is primarily responsible for stabilizing the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 5

Collagen is a fibrous protein composed of three polypeptide chains coiled like a rope. Which level of protein structure does this represent?

Accepted Answer

Quaternary structure

Question 6

Which of the following statements about protein folding is TRUE?

Accepted Answer

Diseases such as Alzheimer's and mad cow disease are associated with misfolded proteins.

Question 7

Which of the following is a correct description of a peptide bond?

Accepted Answer

A bond formed between the carboxyl group of one amino acid and the amino group of another

Question 8

Which protein is responsible for transporting oxygen in the blood?

Accepted Answer

Hemoglobin

Question 9

What is the main difference between the structure of starch and the structure of proteins?

Accepted Answer

Starch is a polymer of glucose, while proteins are polymers of amino acids.

Question 10

Which of the following equations correctly represents the formation of a peptide bond between two amino acids?

Accepted Answer

$$\mathrm{Amino\ acid}_1 + \mathrm{Amino\ acid}_2 \rightarrow \mathrm{Dipeptide} + H_2O$$

Question 11

Which of the following best explains why proteins can perform such a wide variety of functions in cells?

Accepted Answer

Proteins have a diversity of structures due to the variety of amino acid side chains.

Question 12

Which of the following is a real-world consequence of protein misfolding?

Accepted Answer

Formation of amyloid plaques in Alzheimer's disease

Question 13

Which of the following is NOT a macromolecule?

Accepted Answer

Lipid

Question 14

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

Accepted Answer

The arrangement of multiple polypeptide chains into a single functional protein

Question 15

Which of the following diseases is caused by a change in the primary structure of hemoglobin?

Accepted Answer

Sickle cell disease

Question 16

Which of the following is a storage protein found in egg whites and used as an amino acid source for developing embryos?

Accepted Answer

Ovalbumin

Question 17

Which of the following is a correct statement about the relationship between protein structure and function?

Accepted Answer

A protein must fold into its correct 3D shape to function properly.

Question 18

Which of the following is a structural protein that provides support in connective tissue?

Accepted Answer

Collagen

Question 19

Which of the following is the correct order of protein structural levels from simplest to most complex?

Accepted Answer

Primary, secondary, tertiary, quaternary

Question 20

Which of the following best describes the role of R groups in amino acids?

Accepted Answer

They determine the unique properties and functions of each amino acid.

Structures and Functions of the Four Major Classes of Biological Molecules

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